diff --git a/.vscode/settings.json b/.vscode/settings.json
index e7f6f06..78efe5e 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -85,6 +85,7 @@
         "ruru",
         "sessionmaker",
         "sqlalchemy",
+        "sqliteuuid",
         "starlette",
         "stefano",
         "testadmin",
diff --git a/alembic/versions/0a455608256f_add_groups_table_and_migrate_group_.py b/alembic/versions/0a455608256f_add_groups_table_and_migrate_group_.py
new file mode 100644
index 0000000..6c2f83e
--- /dev/null
+++ b/alembic/versions/0a455608256f_add_groups_table_and_migrate_group_.py
@@ -0,0 +1,110 @@
+"""add groups table and migrate group_title data
+
+Revision ID: 0a455608256f
+Revises: 95b61a92455a
+Create Date: 2025-06-10 09:22:11.820035
+
+"""
+import uuid
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '0a455608256f'
+down_revision: Union[str, None] = '95b61a92455a'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('groups',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('name', sa.String(), nullable=False),
+    sa.Column('sort_order', sa.Integer(), nullable=False, server_default='0'),
+    sa.Column('created_at', sa.DateTime(), server_default=sa.text('now()'), nullable=True),
+    sa.Column('updated_at', sa.DateTime(), server_default=sa.text('now()'), nullable=True),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('name')
+    )
+
+    # Create temporary table for group mapping
+    group_mapping = op.create_table(
+        'group_mapping',
+        sa.Column('group_title', sa.String(), nullable=False),
+        sa.Column('group_id', sa.UUID(), nullable=False)
+    )
+
+    # Get existing group titles and create groups
+    conn = op.get_bind()
+    distinct_groups = conn.execute(
+        sa.text("SELECT DISTINCT group_title FROM channels")
+    ).fetchall()
+
+    for group in distinct_groups:
+        group_title = group[0]
+        group_id = str(uuid.uuid4())
+        conn.execute(
+            sa.text(
+                "INSERT INTO groups (id, name, sort_order) "
+                "VALUES (:id, :name, 0)"
+            ).bindparams(id=group_id, name=group_title)
+        )
+        conn.execute(
+            group_mapping.insert().values(
+                group_title=group_title,
+                group_id=group_id
+            )
+        )
+
+    # Add group_id column (nullable first)
+    op.add_column('channels', sa.Column('group_id', sa.UUID(), nullable=True))
+
+    # Update channels with group_ids
+    conn.execute(
+        sa.text(
+            "UPDATE channels c SET group_id = gm.group_id "
+            "FROM group_mapping gm WHERE c.group_title = gm.group_title"
+        )
+    )
+
+    # Now make group_id non-nullable and add constraints
+    op.alter_column('channels', 'group_id', nullable=False)
+    op.drop_constraint(op.f('uix_group_title_name'), 'channels', type_='unique')
+    op.create_unique_constraint('uix_group_id_name', 'channels', ['group_id', 'name'])
+    op.create_foreign_key('fk_channels_group_id', 'channels', 'groups', ['group_id'], ['id'])
+
+    # Clean up and drop group_title
+    op.drop_table('group_mapping')
+    op.drop_column('channels', 'group_title')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('channels', sa.Column('group_title', sa.VARCHAR(), autoincrement=False, nullable=True))
+    
+    # Restore group_title values from groups table
+    conn = op.get_bind()
+    conn.execute(
+        sa.text(
+            "UPDATE channels c SET group_title = g.name "
+            "FROM groups g WHERE c.group_id = g.id"
+        )
+    )
+    
+    # Now make group_title non-nullable
+    op.alter_column('channels', 'group_title', nullable=False)
+    
+    # Drop constraints and columns
+    op.drop_constraint('fk_channels_group_id', 'channels', type_='foreignkey')
+    op.drop_constraint('uix_group_id_name', 'channels', type_='unique')
+    op.create_unique_constraint(op.f('uix_group_title_name'), 'channels', ['group_title', 'name'])
+    op.drop_column('channels', 'group_id')
+    op.drop_table('groups')
+    # ### end Alembic commands ###
diff --git a/app/main.py b/app/main.py
index 1e79974..b03957e 100644
--- a/app/main.py
+++ b/app/main.py
@@ -2,7 +2,7 @@ from fastapi import FastAPI
 from fastapi.concurrency import asynccontextmanager
 from fastapi.openapi.utils import get_openapi
 
-from app.routers import auth, channels, playlist, priorities
+from app.routers import auth, channels, groups, playlist, priorities
 from app.utils.database import init_db
 
 
@@ -68,3 +68,4 @@ app.include_router(auth.router)
 app.include_router(channels.router)
 app.include_router(playlist.router)
 app.include_router(priorities.router)
+app.include_router(groups.router)
diff --git a/app/models/__init__.py b/app/models/__init__.py
index 29b82a9..d3a14da 100644
--- a/app/models/__init__.py
+++ b/app/models/__init__.py
@@ -1,10 +1,13 @@
-from .db import Base, ChannelDB, ChannelURL
+from .db import Base, ChannelDB, ChannelURL, Group
 from .schemas import (
     ChannelCreate,
     ChannelResponse,
     ChannelUpdate,
     ChannelURLCreate,
     ChannelURLResponse,
+    GroupCreate,
+    GroupResponse,
+    GroupUpdate,
 )
 
 __all__ = [
@@ -16,4 +19,8 @@ __all__ = [
     "ChannelURL",
     "ChannelURLCreate",
     "ChannelURLResponse",
+    "Group",
+    "GroupCreate",
+    "GroupResponse",
+    "GroupUpdate",
 ]
diff --git a/app/models/db.py b/app/models/db.py
index adf02ce..fb570c5 100644
--- a/app/models/db.py
+++ b/app/models/db.py
@@ -1,18 +1,58 @@
+import os
 import uuid
 from datetime import datetime, timezone
 
 from sqlalchemy import (
+    TEXT,
     Boolean,
     Column,
     DateTime,
     ForeignKey,
     Integer,
     String,
+    TypeDecorator,
     UniqueConstraint,
 )
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import declarative_base, relationship
 
+
+# Custom UUID type for SQLite compatibility
+class SQLiteUUID(TypeDecorator):
+    """Enables UUID support for SQLite with proper comparison handling."""
+
+    impl = TEXT
+    cache_ok = True
+
+    def process_bind_param(self, value, dialect):
+        if value is None:
+            return value
+        if isinstance(value, uuid.UUID):
+            return str(value)
+        try:
+            # Validate string format by attempting to create UUID
+            uuid.UUID(value)
+            return value
+        except (ValueError, AttributeError):
+            raise ValueError(f"Invalid UUID string format: {value}")
+
+    def process_result_value(self, value, dialect):
+        if value is None:
+            return value
+        return uuid.UUID(value)
+
+    def compare_values(self, x, y):
+        if x is None or y is None:
+            return x == y
+        return str(x) == str(y)
+
+
+# Determine which UUID type to use based on environment
+if os.getenv("MOCK_AUTH", "").lower() == "true":
+    UUID_COLUMN_TYPE = SQLiteUUID()
+else:
+    UUID_COLUMN_TYPE = UUID(as_uuid=True)
+
 Base = declarative_base()
 
 
@@ -25,20 +65,37 @@ class Priority(Base):
     description = Column(String, nullable=False)
 
 
+class Group(Base):
+    """SQLAlchemy model for channel groups"""
+
+    __tablename__ = "groups"
+
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
+    name = Column(String, nullable=False, unique=True)
+    sort_order = Column(Integer, nullable=False, default=0)
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(
+        DateTime,
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    # Relationship with Channel
+    channels = relationship("ChannelDB", back_populates="group")
+
+
 class ChannelDB(Base):
     """SQLAlchemy model for IPTV channels"""
 
     __tablename__ = "channels"
 
-    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
     tvg_id = Column(String, nullable=False)
     name = Column(String, nullable=False)
-    group_title = Column(String, nullable=False)
+    group_id = Column(UUID_COLUMN_TYPE, ForeignKey("groups.id"), nullable=False)
     tvg_name = Column(String)
 
-    __table_args__ = (
-        UniqueConstraint("group_title", "name", name="uix_group_title_name"),
-    )
+    __table_args__ = (UniqueConstraint("group_id", "name", name="uix_group_id_name"),)
     tvg_logo = Column(String)
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
     updated_at = Column(
@@ -47,10 +104,11 @@ class ChannelDB(Base):
         onupdate=lambda: datetime.now(timezone.utc),
     )
 
-    # Relationship with ChannelURL
+    # Relationships
     urls = relationship(
         "ChannelURL", back_populates="channel", cascade="all, delete-orphan"
     )
+    group = relationship("Group", back_populates="channels")
 
 
 class ChannelURL(Base):
@@ -58,9 +116,9 @@ class ChannelURL(Base):
 
     __tablename__ = "channels_urls"
 
-    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
     channel_id = Column(
-        UUID(as_uuid=True),
+        UUID_COLUMN_TYPE,
         ForeignKey("channels.id", ondelete="CASCADE"),
         nullable=False,
     )
diff --git a/app/models/schemas.py b/app/models/schemas.py
index 22e122c..3b73c84 100644
--- a/app/models/schemas.py
+++ b/app/models/schemas.py
@@ -53,12 +53,54 @@ class ChannelURLResponse(ChannelURLBase):
     pass
 
 
+# New Group Schemas
+class GroupCreate(BaseModel):
+    """Pydantic model for creating groups"""
+
+    name: str
+    sort_order: int = Field(default=0, ge=0)
+
+
+class GroupUpdate(BaseModel):
+    """Pydantic model for updating groups"""
+
+    name: Optional[str] = None
+    sort_order: Optional[int] = Field(None, ge=0)
+
+
+class GroupResponse(BaseModel):
+    """Pydantic model for group responses"""
+
+    id: UUID
+    name: str
+    sort_order: int
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class GroupSortUpdate(BaseModel):
+    """Pydantic model for updating a single group's sort order"""
+
+    sort_order: int = Field(ge=0)
+
+
+class GroupBulkSort(BaseModel):
+    """Pydantic model for bulk updating group sort orders"""
+
+    groups: list[dict] = Field(
+        description="List of dicts with group_id and new sort_order",
+        json_schema_extra={"example": [{"group_id": "uuid", "sort_order": 1}]},
+    )
+
+
 class ChannelCreate(BaseModel):
     """Pydantic model for creating channels"""
 
     urls: list[ChannelURLCreate]  # List of URL objects with priority
     name: str
-    group_title: str
+    group_id: UUID
     tvg_id: str
     tvg_logo: str
     tvg_name: str
@@ -76,7 +118,7 @@ class ChannelUpdate(BaseModel):
     """Pydantic model for updating channels (all fields optional)"""
 
     name: Optional[str] = Field(None, min_length=1)
-    group_title: Optional[str] = Field(None, min_length=1)
+    group_id: Optional[UUID] = None
     tvg_id: Optional[str] = Field(None, min_length=1)
     tvg_logo: Optional[str] = None
     tvg_name: Optional[str] = Field(None, min_length=1)
@@ -87,7 +129,7 @@ class ChannelResponse(BaseModel):
 
     id: UUID
     name: str
-    group_title: str
+    group_id: UUID
     tvg_id: str
     tvg_logo: str
     tvg_name: str
diff --git a/app/routers/channels.py b/app/routers/channels.py
index 4c2118a..67c3189 100644
--- a/app/routers/channels.py
+++ b/app/routers/channels.py
@@ -13,6 +13,7 @@ from app.models import (
     ChannelURL,
     ChannelURLCreate,
     ChannelURLResponse,
+    Group,
 )
 from app.models.auth import CognitoUser
 from app.models.schemas import ChannelURLUpdate
@@ -29,12 +30,20 @@ def create_channel(
     user: CognitoUser = Depends(get_current_user),
 ):
     """Create a new channel"""
-    # Check for duplicate channel (same group_title + name)
+    # Check if group exists
+    group = db.query(Group).filter(Group.id == channel.group_id).first()
+    if not group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Group not found",
+        )
+
+    # Check for duplicate channel (same group_id + name)
     existing_channel = (
         db.query(ChannelDB)
         .filter(
             and_(
-                ChannelDB.group_title == channel.group_title,
+                ChannelDB.group_id == channel.group_id,
                 ChannelDB.name == channel.name,
             )
         )
@@ -44,7 +53,7 @@ def create_channel(
     if existing_channel:
         raise HTTPException(
             status_code=status.HTTP_409_CONFLICT,
-            detail="Channel with same group_title and name already exists",
+            detail="Channel with same group_id and name already exists",
         )
 
     # Create channel without URLs first
@@ -96,20 +105,27 @@ def update_channel(
             status_code=status.HTTP_404_NOT_FOUND, detail="Channel not found"
         )
 
-    # Only check for duplicates if name or group_title are being updated
-    if channel.name is not None or channel.group_title is not None:
+    # Only check for duplicates if name or group_id are being updated
+    if channel.name is not None or channel.group_id is not None:
         name = channel.name if channel.name is not None else db_channel.name
-        group_title = (
-            channel.group_title
-            if channel.group_title is not None
-            else db_channel.group_title
+        group_id = (
+            channel.group_id if channel.group_id is not None else db_channel.group_id
         )
 
+        # Check if new group exists
+        if channel.group_id is not None:
+            group = db.query(Group).filter(Group.id == channel.group_id).first()
+            if not group:
+                raise HTTPException(
+                    status_code=status.HTTP_404_NOT_FOUND,
+                    detail="Group not found",
+                )
+
         existing_channel = (
             db.query(ChannelDB)
             .filter(
                 and_(
-                    ChannelDB.group_title == group_title,
+                    ChannelDB.group_id == group_id,
                     ChannelDB.name == name,
                     ChannelDB.id != channel_id,
                 )
@@ -120,7 +136,7 @@ def update_channel(
         if existing_channel:
             raise HTTPException(
                 status_code=status.HTTP_409_CONFLICT,
-                detail="Channel with same group_title and name already exists",
+                detail="Channel with same group_id and name already exists",
             )
 
     # Update only provided fields
@@ -163,9 +179,69 @@ def list_channels(
     return db.query(ChannelDB).offset(skip).limit(limit).all()
 
 
+# New endpoint to get channels by group
+@router.get("/groups/{group_id}/channels", response_model=list[ChannelResponse])
+def get_channels_by_group(
+    group_id: UUID,
+    db: Session = Depends(get_db),
+):
+    """Get all channels for a specific group"""
+    group = db.query(Group).filter(Group.id == group_id).first()
+    if not group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+    return db.query(ChannelDB).filter(ChannelDB.group_id == group_id).all()
+
+
+# New endpoint to update a channel's group
+@router.put("/{channel_id}/group", response_model=ChannelResponse)
+@require_roles("admin")
+def update_channel_group(
+    channel_id: UUID,
+    group_id: UUID,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Update a channel's group"""
+    channel = db.query(ChannelDB).filter(ChannelDB.id == channel_id).first()
+    if not channel:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Channel not found"
+        )
+
+    group = db.query(Group).filter(Group.id == group_id).first()
+    if not group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+
+    # Check for duplicate channel name in new group
+    existing_channel = (
+        db.query(ChannelDB)
+        .filter(
+            and_(
+                ChannelDB.group_id == group_id,
+                ChannelDB.name == channel.name,
+                ChannelDB.id != channel_id,
+            )
+        )
+        .first()
+    )
+
+    if existing_channel:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="Channel with same name already exists in target group",
+        )
+
+    channel.group_id = group_id
+    db.commit()
+    db.refresh(channel)
+    return channel
+
+
 # URL Management Endpoints
-
-
 @router.post(
     "/{channel_id}/urls",
     response_model=ChannelURLResponse,
diff --git a/app/routers/groups.py b/app/routers/groups.py
new file mode 100644
index 0000000..14f6f0a
--- /dev/null
+++ b/app/routers/groups.py
@@ -0,0 +1,169 @@
+from uuid import UUID
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app.auth.dependencies import get_current_user, require_roles
+from app.models import Group
+from app.models.auth import CognitoUser
+from app.models.schemas import (
+    GroupBulkSort,
+    GroupCreate,
+    GroupResponse,
+    GroupSortUpdate,
+    GroupUpdate,
+)
+from app.utils.database import get_db
+
+router = APIRouter(prefix="/groups", tags=["groups"])
+
+
+@router.post("/", response_model=GroupResponse, status_code=status.HTTP_201_CREATED)
+@require_roles("admin")
+def create_group(
+    group: GroupCreate,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Create a new channel group"""
+    # Check for duplicate group name
+    existing_group = db.query(Group).filter(Group.name == group.name).first()
+    if existing_group:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="Group with this name already exists",
+        )
+
+    db_group = Group(**group.model_dump())
+    db.add(db_group)
+    db.commit()
+    db.refresh(db_group)
+    return db_group
+
+
+@router.get("/{group_id}", response_model=GroupResponse)
+def get_group(group_id: UUID, db: Session = Depends(get_db)):
+    """Get a group by id"""
+    group = db.query(Group).filter(Group.id == group_id).first()
+    if not group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+    return group
+
+
+@router.put("/{group_id}", response_model=GroupResponse)
+@require_roles("admin")
+def update_group(
+    group_id: UUID,
+    group: GroupUpdate,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Update a group's name or sort order"""
+    db_group = db.query(Group).filter(Group.id == group_id).first()
+    if not db_group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+
+    # Check for duplicate name if name is being updated
+    if group.name is not None and group.name != db_group.name:
+        existing_group = db.query(Group).filter(Group.name == group.name).first()
+        if existing_group:
+            raise HTTPException(
+                status_code=status.HTTP_409_CONFLICT,
+                detail="Group with this name already exists",
+            )
+
+    # Update only provided fields
+    update_data = group.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(db_group, key, value)
+
+    db.commit()
+    db.refresh(db_group)
+    return db_group
+
+
+@router.delete("/{group_id}", status_code=status.HTTP_204_NO_CONTENT)
+@require_roles("admin")
+def delete_group(
+    group_id: UUID,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Delete a group (only if it has no channels)"""
+    group = db.query(Group).filter(Group.id == group_id).first()
+    if not group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+
+    # Check if group has any channels
+    if group.channels:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Cannot delete group with existing channels",
+        )
+
+    db.delete(group)
+    db.commit()
+    return None
+
+
+@router.get("/", response_model=list[GroupResponse])
+def list_groups(db: Session = Depends(get_db)):
+    """List all groups sorted by sort_order"""
+    return db.query(Group).order_by(Group.sort_order).all()
+
+
+@router.put("/{group_id}/sort", response_model=GroupResponse)
+@require_roles("admin")
+def update_group_sort_order(
+    group_id: UUID,
+    sort_update: GroupSortUpdate,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Update a single group's sort order"""
+    db_group = db.query(Group).filter(Group.id == group_id).first()
+    if not db_group:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
+        )
+
+    db_group.sort_order = sort_update.sort_order
+    db.commit()
+    db.refresh(db_group)
+    return db_group
+
+
+@router.post("/reorder", response_model=list[GroupResponse])
+@require_roles("admin")
+def bulk_update_sort_orders(
+    bulk_sort: GroupBulkSort,
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Bulk update group sort orders"""
+    groups_to_update = []
+
+    for group_data in bulk_sort.groups:
+        group_id = group_data["group_id"]
+        sort_order = group_data["sort_order"]
+
+        group = db.query(Group).filter(Group.id == str(group_id)).first()
+        if not group:
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail=f"Group with id {group_id} not found",
+            )
+
+        group.sort_order = sort_order
+        groups_to_update.append(group)
+
+    db.commit()
+
+    # Return all groups in their new order
+    return db.query(Group).order_by(Group.sort_order).all()
diff --git a/tests/auth/test_dependencies.py b/tests/auth/test_dependencies.py
index 5d73400..17f033e 100644
--- a/tests/auth/test_dependencies.py
+++ b/tests/auth/test_dependencies.py
@@ -173,3 +173,33 @@ def test_mock_auth_import(monkeypatch):
 
         # Reload again to restore original state
         importlib.reload(app.auth.dependencies)
+
+
+def test_cognito_auth_import(monkeypatch):
+    """Test that cognito auth is imported when MOCK_AUTH=false (covers line 14)"""
+    # Save original env var value
+    original_value = os.environ.get("MOCK_AUTH")
+
+    try:
+        # Set MOCK_AUTH to false
+        monkeypatch.setenv("MOCK_AUTH", "false")
+
+        # Reload the dependencies module to trigger the import condition
+        import app.auth.dependencies
+
+        importlib.reload(app.auth.dependencies)
+
+        # Verify that get_user_from_token was imported from app.auth.cognito
+        from app.auth.dependencies import get_user_from_token
+
+        assert get_user_from_token.__module__ == "app.auth.cognito"
+
+    finally:
+        # Restore original env var
+        if original_value is None:
+            monkeypatch.delenv("MOCK_AUTH", raising=False)
+        else:
+            monkeypatch.setenv("MOCK_AUTH", original_value)
+
+        # Reload again to restore original state
+        importlib.reload(app.auth.dependencies)
diff --git a/tests/models/test_db.py b/tests/models/test_db.py
new file mode 100644
index 0000000..15e2cac
--- /dev/null
+++ b/tests/models/test_db.py
@@ -0,0 +1,135 @@
+import os
+import uuid
+from unittest.mock import patch
+
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.models.db import UUID_COLUMN_TYPE, Base, SQLiteUUID
+
+# --- Test SQLiteUUID Type ---
+
+
+def test_sqliteuuid_process_bind_param_none():
+    """Test SQLiteUUID.process_bind_param with None returns None"""
+    uuid_type = SQLiteUUID()
+    assert uuid_type.process_bind_param(None, None) is None
+
+
+def test_sqliteuuid_process_bind_param_valid_uuid():
+    """Test SQLiteUUID.process_bind_param with valid UUID returns string"""
+    uuid_type = SQLiteUUID()
+    test_uuid = uuid.uuid4()
+    assert uuid_type.process_bind_param(test_uuid, None) == str(test_uuid)
+
+
+def test_sqliteuuid_process_bind_param_valid_string():
+    """Test SQLiteUUID.process_bind_param with valid UUID string returns string"""
+    uuid_type = SQLiteUUID()
+    test_uuid_str = "550e8400-e29b-41d4-a716-446655440000"
+    assert uuid_type.process_bind_param(test_uuid_str, None) == test_uuid_str
+
+
+def test_sqliteuuid_process_bind_param_invalid_string():
+    """Test SQLiteUUID.process_bind_param raises ValueError for invalid UUID"""
+    uuid_type = SQLiteUUID()
+    with pytest.raises(ValueError, match="Invalid UUID string format"):
+        uuid_type.process_bind_param("invalid-uuid", None)
+
+
+def test_sqliteuuid_process_result_value_none():
+    """Test SQLiteUUID.process_result_value with None returns None"""
+    uuid_type = SQLiteUUID()
+    assert uuid_type.process_result_value(None, None) is None
+
+
+def test_sqliteuuid_process_result_value_valid_string():
+    """Test SQLiteUUID.process_result_value converts string to UUID"""
+    uuid_type = SQLiteUUID()
+    test_uuid = uuid.uuid4()
+    result = uuid_type.process_result_value(str(test_uuid), None)
+    assert isinstance(result, uuid.UUID)
+    assert result == test_uuid
+
+
+def test_sqliteuuid_compare_values_none():
+    """Test SQLiteUUID.compare_values handles None values"""
+    uuid_type = SQLiteUUID()
+    assert uuid_type.compare_values(None, None) is True
+    assert uuid_type.compare_values(None, uuid.uuid4()) is False
+    assert uuid_type.compare_values(uuid.uuid4(), None) is False
+
+
+def test_sqliteuuid_compare_values_uuid():
+    """Test SQLiteUUID.compare_values compares UUIDs as strings"""
+    uuid_type = SQLiteUUID()
+    test_uuid = uuid.uuid4()
+    assert uuid_type.compare_values(test_uuid, test_uuid) is True
+    assert uuid_type.compare_values(test_uuid, uuid.uuid4()) is False
+
+
+def test_sqlite_uuid_comparison():
+    """Test SQLiteUUID comparison functionality (moved from db_mocks.py)"""
+    uuid_type = SQLiteUUID()
+
+    # Test equal UUIDs
+    uuid1 = uuid.uuid4()
+    uuid2 = uuid.UUID(str(uuid1))
+    assert uuid_type.compare_values(uuid1, uuid2) is True
+
+    # Test UUID vs string
+    assert uuid_type.compare_values(uuid1, str(uuid1)) is True
+
+    # Test None comparisons
+    assert uuid_type.compare_values(None, None) is True
+    assert uuid_type.compare_values(uuid1, None) is False
+    assert uuid_type.compare_values(None, uuid1) is False
+
+    # Test different UUIDs
+    uuid3 = uuid.uuid4()
+    assert uuid_type.compare_values(uuid1, uuid3) is False
+
+
+def test_sqlite_uuid_binding():
+    """Test SQLiteUUID binding parameter handling (moved from db_mocks.py)"""
+    uuid_type = SQLiteUUID()
+
+    # Test UUID object binding
+    uuid_obj = uuid.uuid4()
+    assert uuid_type.process_bind_param(uuid_obj, None) == str(uuid_obj)
+
+    # Test valid UUID string binding
+    uuid_str = str(uuid.uuid4())
+    assert uuid_type.process_bind_param(uuid_str, None) == uuid_str
+
+    # Test None handling
+    assert uuid_type.process_bind_param(None, None) is None
+
+    # Test invalid UUID string
+    with pytest.raises(ValueError):
+        uuid_type.process_bind_param("invalid-uuid", None)
+
+
+# --- Test UUID Column Type Configuration ---
+
+
+def test_uuid_column_type_default():
+    """Test UUID_COLUMN_TYPE uses SQLiteUUID in test environment"""
+    assert isinstance(UUID_COLUMN_TYPE, SQLiteUUID)
+
+
+@patch.dict(os.environ, {"MOCK_AUTH": "false"})
+def test_uuid_column_type_postgres():
+    """Test UUID_COLUMN_TYPE uses Postgres UUID when MOCK_AUTH=false"""
+    # Need to re-import to get the patched environment
+    from importlib import reload
+
+    from app import models
+
+    reload(models.db)
+    from sqlalchemy.dialects.postgresql import UUID as PostgresUUID
+
+    from app.models.db import UUID_COLUMN_TYPE
+
+    assert isinstance(UUID_COLUMN_TYPE, PostgresUUID)
diff --git a/tests/routers/test_channels.py b/tests/routers/test_channels.py
index db3864b..349ad20 100644
--- a/tests/routers/test_channels.py
+++ b/tests/routers/test_channels.py
@@ -1,13 +1,14 @@
 import uuid
+from datetime import datetime, timezone
 
 import pytest
-from fastapi import FastAPI, status
+from fastapi import status
 from fastapi.testclient import TestClient
 from sqlalchemy import String
 from sqlalchemy.orm import Session
 
 from app.auth.dependencies import get_current_user
-from app.routers.channels import router as channels_router
+from app.main import app
 from app.utils.database import get_db
 
 # Import mocks and fixtures
@@ -22,18 +23,16 @@ from tests.utils.db_mocks import (
     MockBase,
     MockChannelDB,
     MockChannelURL,
+    MockGroup,
     MockPriority,
+    create_mock_priorities_and_group,
     engine_mock,
     mock_get_db,
 )
 from tests.utils.db_mocks import session_mock as TestingSessionLocal
 
-# Create a FastAPI instance for testing
-app = FastAPI()
-
-# Override dependencies
+# Override dependencies for testing
 app.dependency_overrides[get_db] = mock_get_db
-app.include_router(channels_router)
 
 client = TestClient(app)
 
@@ -42,26 +41,24 @@ client = TestClient(app)
 
 
 def test_create_channel_success(db_session: Session, admin_user_client: TestClient):
-    # Setup a priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create mock priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Test Group"
+    )
 
     channel_data = {
         "tvg_id": "channel1.tv",
         "name": "Test Channel 1",
-        "group_title": "Test Group",
+        "group_id": str(group_id),
         "tvg_name": "TestChannel1",
         "tvg_logo": "logo.png",
         "urls": [{"url": "http://stream1.com/test", "priority_id": 100}],
     }
-    response = admin_user_client.post(
-        "/channels/", json=channel_data
-    )  # No headers needed now
+    response = admin_user_client.post("/channels/", json=channel_data)
     assert response.status_code == status.HTTP_201_CREATED
     data = response.json()
     assert data["name"] == "Test Channel 1"
-    assert data["group_title"] == "Test Group"
+    assert data["group_id"] == str(group_id)
     assert data["tvg_id"] == "channel1.tv"
     assert len(data["urls"]) == 1
     assert data["urls"][0]["url"] == "http://stream1.com/test"
@@ -74,12 +71,12 @@ def test_create_channel_success(db_session: Session, admin_user_client: TestClie
         .first()
     )
     assert db_channel is not None
-    assert db_channel.group_title == "Test Group"
+    assert db_channel.group_id == group_id
 
-    # Query URLs using exact string comparison
+    # Query URLs
     db_urls = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.channel_id.cast(String()) == db_channel.id)
+        .filter(MockChannelURL.channel_id == db_channel.id)
         .all()
     )
 
@@ -88,16 +85,16 @@ def test_create_channel_success(db_session: Session, admin_user_client: TestClie
 
 
 def test_create_channel_duplicate(db_session: Session, admin_user_client: TestClient):
-    # Setup a priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create mock priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Duplicate Group"
+    )
 
     # Create initial channel
     initial_channel_data = {
         "tvg_id": "channel_dup.tv",
         "name": "Duplicate Channel",
-        "group_title": "Duplicate Group",
+        "group_id": str(group_id),
         "tvg_name": "DuplicateChannelName",
         "tvg_logo": "duplicate_logo.png",
         "urls": [{"url": "http://stream_dup.com/test", "priority_id": 100}],
@@ -114,15 +111,15 @@ def test_create_channel_duplicate(db_session: Session, admin_user_client: TestCl
 def test_create_channel_forbidden_for_non_admin(
     db_session: Session, non_admin_user_client: TestClient
 ):
-    # Setup a priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create mock priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Forbidden Group"
+    )
 
     channel_data = {
         "tvg_id": "channel_forbidden.tv",
         "name": "Forbidden Channel",
-        "group_title": "Forbidden Group",
+        "group_id": str(group_id),
         "tvg_name": "ForbiddenChannelName",
         "tvg_logo": "forbidden_logo.png",
         "urls": [{"url": "http://stream_forbidden.com/test", "priority_id": 100}],
@@ -132,20 +129,39 @@ def test_create_channel_forbidden_for_non_admin(
     assert "required roles" in response.json()["detail"]
 
 
+def test_create_channel_group_not_found(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test creating channel with non-existent group returns 404"""
+    # No group created in DB
+    channel_data = {
+        "tvg_id": "no_group.tv",
+        "name": "No Group Channel",
+        "group_id": str(uuid.uuid4()),  # Random non-existent group ID
+        "tvg_name": "NoGroupChannel",
+        "tvg_logo": "no_group_logo.png",
+        "urls": [{"url": "http://no_group.com/stream", "priority_id": 100}],
+    }
+    response = admin_user_client.post("/channels/", json=channel_data)
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
 # --- Test Cases For Get Channel ---
 
 
 def test_get_channel_success(db_session: Session, admin_user_client: TestClient):
-    # Setup a priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group using utility function
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Get Group"
+    )
 
     # Create a channel first
+
     channel_data_create = {
         "tvg_id": "get_me.tv",
         "name": "Get Me Channel",
-        "group_title": "Get Group",
+        "group_id": str(group_id),
         "tvg_name": "GetMeChannelName",
         "tvg_logo": "get_me_logo.png",
         "urls": [{"url": "http://get_me.com/stream", "priority_id": 100}],
@@ -162,7 +178,7 @@ def test_get_channel_success(db_session: Session, admin_user_client: TestClient)
     data = get_response.json()
     assert data["id"] == created_channel_id
     assert data["name"] == "Get Me Channel"
-    assert data["group_title"] == "Get Group"
+    assert data["group_id"] == str(group_id)
     assert len(data["urls"]) == 1
     app.dependency_overrides.pop(get_current_user, None)
 
@@ -180,15 +196,15 @@ def test_get_channel_not_found(db_session: Session, admin_user_client: TestClien
 
 
 def test_update_channel_success(db_session: Session, admin_user_client: TestClient):
-    # Setup priority and create initial channel
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group using utility function
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Update Group"
+    )
 
     initial_channel_data = {
         "tvg_id": "update_me.tv",
         "name": "Update Me Channel",
-        "group_title": "Update Group",
+        "group_id": str(group_id),
         "tvg_name": "UpdateMeChannelName",
         "tvg_logo": "update_me_logo.png",
         "urls": [{"url": "http://update_me.com/stream", "priority_id": 100}],
@@ -205,13 +221,13 @@ def test_update_channel_success(db_session: Session, admin_user_client: TestClie
     data = response.json()
     assert data["id"] == created_channel_id
     assert data["name"] == "Updated Channel Name"
-    assert data["group_title"] == "Update Group"
+    assert data["group_id"] == str(group_id)
     assert data["tvg_logo"] == "new_logo.png"
 
     # Verify in DB
     db_channel = (
         db_session.query(MockChannelDB)
-        .filter(MockChannelDB.id.cast(String()) == uuid.UUID(created_channel_id))
+        .filter(MockChannelDB.id == created_channel_id)
         .first()
     )
     assert db_channel is not None
@@ -220,16 +236,15 @@ def test_update_channel_success(db_session: Session, admin_user_client: TestClie
 
 
 def test_update_channel_conflict(db_session: Session, admin_user_client: TestClient):
-    # Setup priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priorities and groups using utility function
+    group1_id = create_mock_priorities_and_group(db_session, [(100, "High")], "Group A")
+    group2_id = create_mock_priorities_and_group(db_session, [], "Group B")
 
     # Create channel 1
     channel1_data = {
         "tvg_id": "c1.tv",
         "name": "Channel One",
-        "group_title": "Group A",
+        "group_id": str(group1_id),
         "tvg_name": "C1Name",
         "tvg_logo": "c1logo.png",
         "urls": [{"url": "http://c1.com", "priority_id": 100}],
@@ -240,7 +255,7 @@ def test_update_channel_conflict(db_session: Session, admin_user_client: TestCli
     channel2_data = {
         "tvg_id": "c2.tv",
         "name": "Channel Two",
-        "group_title": "Group B",
+        "group_id": str(group2_id),
         "tvg_name": "C2Name",
         "tvg_logo": "c2logo.png",
         "urls": [{"url": "http://c2.com", "priority_id": 100}],
@@ -249,7 +264,7 @@ def test_update_channel_conflict(db_session: Session, admin_user_client: TestCli
     channel2_id = response_c2.json()["id"]
 
     # Attempt to update channel 2 to conflict with channel 1
-    update_conflict_data = {"name": "Channel One", "group_title": "Group A"}
+    update_conflict_data = {"name": "Channel One", "group_id": str(group1_id)}
     response = admin_user_client.put(
         f"/channels/{channel2_id}", json=update_conflict_data
     )
@@ -265,19 +280,49 @@ def test_update_channel_not_found(db_session: Session, admin_user_client: TestCl
     assert "Channel not found" in response.json()["detail"]
 
 
+def test_update_channel_group_not_found(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test updating channel with non-existent group returns 404"""
+    # Create priority and group using utility function
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Original Group"
+    )
+
+    initial_channel_data = {
+        "tvg_id": "original.tv",
+        "name": "Original Channel",
+        "group_id": str(group_id),
+        "tvg_name": "OriginalName",
+        "tvg_logo": "original_logo.png",
+        "urls": [{"url": "http://original.com", "priority_id": 100}],
+    }
+    create_response = admin_user_client.post("/channels/", json=initial_channel_data)
+    created_channel_id = create_response.json()["id"]
+
+    # Attempt to update with non-existent group
+    update_data = {"group_id": str(uuid.uuid4())}
+    response = admin_user_client.put(
+        f"/channels/{created_channel_id}", json=update_data
+    )
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
 def test_update_channel_forbidden_for_non_admin(
     db_session: Session,
     non_admin_user_client: TestClient,
     admin_user_client: TestClient,
 ):
-    # Setup priority and create initial channel with admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group using utility function
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Forbidden Update Group"
+    )
+
     initial_channel_data = {
         "tvg_id": "update_forbidden.tv",
         "name": "Update Forbidden",
-        "group_title": "Forbidden Update Group",
+        "group_id": str(group_id),
         "tvg_name": "UFName",
         "tvg_logo": "uflogo.png",
         "urls": [{"url": "http://update_forbidden.com", "priority_id": 100}],
@@ -297,15 +342,15 @@ def test_update_channel_forbidden_for_non_admin(
 
 
 def test_delete_channel_success(db_session: Session, admin_user_client: TestClient):
-    # Setup priority and create initial channel
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Delete Group"
+    )
 
     initial_channel_data = {
         "tvg_id": "delete_me.tv",
         "name": "Delete Me Channel",
-        "group_title": "Delete Group",
+        "group_id": str(group_id),  # Use the ID of the created group
         "tvg_name": "DMName",
         "tvg_logo": "dmlogo.png",
         "urls": [{"url": "http://delete_me.com/stream", "priority_id": 100}],
@@ -317,7 +362,7 @@ def test_delete_channel_success(db_session: Session, admin_user_client: TestClie
     # Verify it exists before delete
     db_channel_before_delete = (
         db_session.query(MockChannelDB)
-        .filter(MockChannelDB.id.cast(String()) == uuid.UUID(created_channel_id))
+        .filter(MockChannelDB.id == uuid.UUID(created_channel_id))
         .first()
     )
     assert db_channel_before_delete is not None
@@ -328,7 +373,7 @@ def test_delete_channel_success(db_session: Session, admin_user_client: TestClie
     # Verify it's gone from DB
     db_channel_after_delete = (
         db_session.query(MockChannelDB)
-        .filter(MockChannelDB.id.cast(String()) == uuid.UUID(created_channel_id))
+        .filter(MockChannelDB.id == uuid.UUID(created_channel_id))
         .first()
     )
     assert db_channel_after_delete is None
@@ -336,9 +381,7 @@ def test_delete_channel_success(db_session: Session, admin_user_client: TestClie
     # Also verify associated URLs are deleted (due to CASCADE in mock model)
     db_urls_after_delete = (
         db_session.query(MockChannelURL)
-        .filter(
-            MockChannelURL.channel_id.cast(String()) == uuid.UUID(created_channel_id)
-        )
+        .filter(MockChannelURL.channel_id == uuid.UUID(created_channel_id))
         .all()
     )
     assert len(db_urls_after_delete) == 0
@@ -356,14 +399,15 @@ def test_delete_channel_forbidden_for_non_admin(
     non_admin_user_client: TestClient,
     admin_user_client: TestClient,
 ):
-    # Setup priority and create initial channel with admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Forbidden Delete Group"
+    )
+
     initial_channel_data = {
         "tvg_id": "delete_forbidden.tv",
         "name": "Delete Forbidden",
-        "group_title": "Forbidden Delete Group",
+        "group_id": str(group_id),  # Use the ID of the created group
         "tvg_name": "DFName",
         "tvg_logo": "dflogo.png",
         "urls": [{"url": "http://delete_forbidden.com", "priority_id": 100}],
@@ -378,7 +422,7 @@ def test_delete_channel_forbidden_for_non_admin(
     # Ensure channel was not deleted
     db_channel_not_deleted = (
         db_session.query(MockChannelDB)
-        .filter(MockChannelDB.id.cast(String()) == uuid.UUID(created_channel_id))
+        .filter(MockChannelDB.id == uuid.UUID(created_channel_id))
         .first()
     )
     assert db_channel_not_deleted is not None
@@ -393,20 +437,230 @@ def test_list_channels_empty(db_session: Session, admin_user_client: TestClient)
     assert response.json() == []
 
 
+def test_get_channels_by_group_success(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test getting channels for an existing group"""
+    # Create priority and groups
+    group1_id = create_mock_priorities_and_group(db_session, [(100, "High")], "Group 1")
+
+    group2_id = create_mock_priorities_and_group(db_session, [], "Group 2")
+
+    # Create 2 channels in group1 and 1 in group2
+    channels_group1 = [
+        {
+            "tvg_id": f"g1c{i}.tv",
+            "name": f"Group1 Channel {i}",
+            "group_id": str(group1_id),
+            "tvg_name": f"G1C{i}",
+            "tvg_logo": f"g1c{i}_logo.png",
+            "urls": [{"url": f"http://g1c{i}.com", "priority_id": 100}],
+        }
+        for i in range(2)
+    ]
+    channel_group2 = {
+        "tvg_id": "g2c1.tv",
+        "name": "Group2 Channel 1",
+        "group_id": str(group2_id),
+        "tvg_name": "G2C1",
+        "tvg_logo": "g2c1_logo.png",
+        "urls": [{"url": "http://g2c1.com", "priority_id": 100}],
+    }
+
+    # Create all channels
+    for channel_data in channels_group1 + [channel_group2]:
+        admin_user_client.post("/channels/", json=channel_data)
+
+    # Get channels for group1
+    response = admin_user_client.get(f"/channels/groups/{group1_id}/channels")
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert len(data) == 2
+    assert all(channel["group_id"] == str(group1_id) for channel in data)
+
+
+def test_get_channels_by_group_not_found(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test getting channels for non-existent group returns 404"""
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.get(f"/channels/groups/{random_uuid}/channels")
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+def test_update_channel_group_success(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test successfully updating a channel's group"""
+    # Create priority and group
+    group1_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Original Group"
+    )
+
+    channel_data = {
+        "tvg_id": "original.tv",
+        "name": "Original Channel",
+        "group_id": str(group1_id),
+        "tvg_name": "OriginalName",
+        "tvg_logo": "original_logo.png",
+        "urls": [{"url": "http://original.com", "priority_id": 100}],
+    }
+    create_response = admin_user_client.post("/channels/", json=channel_data)
+    channel_id = create_response.json()["id"]
+
+    # Create target group
+    group2_id = create_mock_priorities_and_group(db_session, [], "Target Group")
+
+    # Update channel's group
+    response = admin_user_client.put(
+        f"/channels/{channel_id}/group?group_id={group2_id}"
+    )
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert data["id"] == channel_id
+    assert data["group_id"] == str(group2_id)
+
+    # Verify in DB
+    db_channel = (
+        db_session.query(MockChannelDB)
+        .filter(MockChannelDB.id == uuid.UUID(channel_id))
+        .first()
+    )
+    assert db_channel.group_id == group2_id
+
+
+def test_update_channel_group_channel_not_found(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test updating non-existent channel's group returns 404"""
+    # Create priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Test Group"
+    )
+
+    # Attempt to update non-existent channel
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.put(
+        f"/channels/{random_uuid}/group?group_id={group_id}"
+    )
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Channel not found" in response.json()["detail"]
+
+
+def test_update_channel_group_group_not_found(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test updating channel to non-existent group returns 404"""
+    # Create priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Original Group"
+    )
+
+    # Create a channel in the original group
+    channel_data = {
+        "tvg_id": "original.tv",
+        "name": "Original Channel",
+        "group_id": str(group_id),
+        "tvg_name": "OriginalName",
+        "tvg_logo": "original_logo.png",
+        "urls": [{"url": "http://original.com", "priority_id": 100}],
+    }
+    create_response = admin_user_client.post("/channels/", json=channel_data)
+    channel_id = create_response.json()["id"]
+
+    # Attempt to update with non-existent group
+    response = admin_user_client.put(
+        f"/channels/{channel_id}/group?group_id={uuid.uuid4()}"
+    )
+
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+def test_update_channel_group_duplicate_name(
+    db_session: Session, admin_user_client: TestClient
+):
+    """Test updating channel to group with duplicate name returns 409"""
+    # Create priority and groups
+    group1_id = create_mock_priorities_and_group(db_session, [(100, "High")], "Group 1")
+    group2_id = create_mock_priorities_and_group(db_session, [], "Group 2")
+
+    # Create channel in each group with same name
+    channel_name = "Duplicate Channel"
+    channel1_data = {
+        "tvg_id": "c1.tv",
+        "name": channel_name,
+        "group_id": str(group1_id),
+        "tvg_name": "C1",
+        "tvg_logo": "c1.png",
+        "urls": [{"url": "http://c1.com", "priority_id": 100}],
+    }
+    channel2_data = {
+        "tvg_id": "c2.tv",
+        "name": channel_name,
+        "group_id": str(group2_id),
+        "tvg_name": "C2",
+        "tvg_logo": "c2.png",
+        "urls": [{"url": "http://c2.com", "priority_id": 100}],
+    }
+    admin_user_client.post("/channels/", json=channel1_data)
+    create2_response = admin_user_client.post("/channels/", json=channel2_data)
+    channel2_id = create2_response.json()["id"]
+
+    # Attempt to move channel2 to group1 (would create duplicate name)
+    response = admin_user_client.put(
+        f"/channels/{channel2_id}/group?group_id={group1_id}"
+    )
+    assert response.status_code == status.HTTP_409_CONFLICT
+    assert "already exists" in response.json()["detail"]
+
+
+def test_update_channel_group_forbidden_for_non_admin(
+    db_session: Session,
+    non_admin_user_client: TestClient,
+    admin_user_client: TestClient,
+):
+    """Test updating channel's group as non-admin returns 403"""
+    # Create priority and groups
+    group1_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Original Group"
+    )
+    group2_id = create_mock_priorities_and_group(db_session, [], "Target Group")
+
+    channel_data = {
+        "tvg_id": "protected.tv",
+        "name": "Protected Channel",
+        "group_id": str(group1_id),
+        "tvg_name": "Protected",
+        "tvg_logo": "protected.png",
+        "urls": [{"url": "http://protected.com", "priority_id": 100}],
+    }
+    create_response = admin_user_client.post("/channels/", json=channel_data)
+    channel_id = create_response.json()["id"]
+
+    # Attempt to update group as non-admin
+    response = non_admin_user_client.put(
+        f"/channels/{channel_id}/group?group_id={group2_id}"
+    )
+    assert response.status_code == status.HTTP_403_FORBIDDEN
+    assert "required roles" in response.json()["detail"]
+
+
 def test_list_channels_with_data_and_pagination(
     db_session: Session, admin_user_client: TestClient
 ):
-    # Setup priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Create priority and group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "List Group"
+    )
 
     # Create some channels
     for i in range(5):
         channel_data = {
             "tvg_id": f"list_c{i}.tv",
             "name": f"List Channel {i}",
-            "group_title": "List Group",
+            "group_id": str(group_id),
             "tvg_name": f"LCName{i}",
             "tvg_logo": f"lclogo{i}.png",
             "urls": [{"url": f"http://list_c{i}.com", "priority_id": 100}],
@@ -454,16 +708,15 @@ def test_list_channels_forbidden_for_non_admin(
 
 
 def test_add_channel_url_success(db_session: Session, admin_user_client: TestClient):
-    # Setup priority and create a channel
-    priority1 = MockPriority(id=100, description="High")
-    priority2 = MockPriority(id=200, description="Medium")
-    db_session.add_all([priority1, priority2])
-    db_session.commit()
+    # Setup priorities and create a group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High"), (200, "Medium")], "URL Group"
+    )
 
     channel_data = {
         "tvg_id": "channel_for_url.tv",
         "name": "Channel For URL",
-        "group_title": "URL Group",
+        "group_id": str(group_id),
         "tvg_name": "CFUName",
         "tvg_logo": "cfulogo.png",
         "urls": [{"url": "http://initial.com/stream", "priority_id": 100}],
@@ -485,7 +738,7 @@ def test_add_channel_url_success(db_session: Session, admin_user_client: TestCli
     # Verify in DB
     db_url = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(data["id"]))
+        .filter(MockChannelURL.id == uuid.UUID(data["id"]))
         .first()
     )
     assert db_url is not None
@@ -503,9 +756,7 @@ def test_add_channel_url_success(db_session: Session, admin_user_client: TestCli
     # for the count of URLs for the channel
     url_count = (
         db_session.query(MockChannelURL)
-        .filter(
-            MockChannelURL.channel_id.cast(String()) == uuid.UUID(created_channel_id)
-        )
+        .filter(MockChannelURL.channel_id == uuid.UUID(created_channel_id))
         .count()
     )
     assert url_count == 2
@@ -521,9 +772,7 @@ def test_add_channel_url_channel_not_found(
     db_session: Session, admin_user_client: TestClient
 ):
     # Setup priority
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    create_mock_priorities_and_group(db_session, [(100, "High")], "My Group")
 
     random_channel_uuid = uuid.uuid4()
     url_data = {"url": "http://stream_no_channel.com", "priority_id": 100}
@@ -540,13 +789,14 @@ def test_add_channel_url_forbidden_for_non_admin(
     admin_user_client: TestClient,
 ):
     # Setup priority and create a channel with admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Forbidden Group"
+    )
+
     channel_data = {
         "tvg_id": "url_forbidden.tv",
         "name": "URL Forbidden",
-        "group_title": "URL Forbidden Group",
+        "group_id": str(group_id),  # Use the ID of the created group
         "tvg_name": "UFName2",
         "tvg_logo": "uflogo2.png",
         "urls": [{"url": "http://url_forbidden.com", "priority_id": 100}],
@@ -567,18 +817,14 @@ def test_add_channel_url_forbidden_for_non_admin(
 
 def test_update_channel_url_success(db_session: Session, admin_user_client: TestClient):
     # Setup priorities and create a channel with a URL
-    priority1 = MockPriority(id=100, description="High")
-    priority2 = MockPriority(id=200, description="Medium")
-    priority3 = MockPriority(
-        id=300, description="Low"
-    )  # New priority for update, Use valid priority ID
-    db_session.add_all([priority1, priority2, priority3])
-    db_session.commit()
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High"), (200, "Medium"), (300, "Low")], "URL Update Group"
+    )
 
     channel_data = {
         "tvg_id": "ch_update_url.tv",
         "name": "Channel Update URL",
-        "group_title": "URL Update Group",
+        "group_id": str(group_id),  # Use the ID of the created group
         "tvg_name": "CUUName",
         "tvg_logo": "cuulogo.png",
         "urls": [{"url": "http://original_url.com/stream", "priority_id": 100}],
@@ -606,7 +852,7 @@ def test_update_channel_url_success(db_session: Session, admin_user_client: Test
     # Verify in DB
     db_url = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(initial_url_id))
+        .filter(MockChannelURL.id == uuid.UUID(initial_url_id))
         .first()
     )
     assert db_url is not None
@@ -619,14 +865,14 @@ def test_update_channel_url_partial_success(
     db_session: Session, admin_user_client: TestClient
 ):
     # Setup priorities and create a channel with a URL
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add_all([priority1])
-    db_session.commit()
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Partial Update Group"
+    )
 
     channel_data = {
         "tvg_id": "ch_partial_update_url.tv",
         "name": "Channel Partial Update URL",
-        "group_title": "URL Partial Update Group",
+        "group_id": str(group_id),
         "tvg_name": "CPUName",
         "tvg_logo": "cpulogo.png",
         "urls": [{"url": "http://partial_original.com/stream", "priority_id": 100}],
@@ -650,7 +896,7 @@ def test_update_channel_url_partial_success(
     # Verify in DB
     db_url = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(initial_url_id))
+        .filter(MockChannelURL.id == uuid.UUID(initial_url_id))
         .first()
     )
     assert db_url is not None
@@ -662,14 +908,15 @@ def test_update_channel_url_partial_success(
 def test_update_channel_url_url_not_found(
     db_session: Session, admin_user_client: TestClient
 ):
-    # Setup priority and create a channel
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority and create a group
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Not Found Group"
+    )
+
     channel_data = {
         "tvg_id": "ch_url_not_found.tv",
         "name": "Channel URL Not Found",
-        "group_title": "URL Not Found Group",
+        "group_id": str(group_id),
         "tvg_name": "CUNFName",
         "tvg_logo": "cunflogo.png",
         "urls": [],
@@ -691,15 +938,17 @@ def test_update_channel_url_channel_id_mismatch_is_url_not_found(
 ):
     # This tests if a URL ID exists but is not associated
     # with the given channel_id in the path
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+
+    # Setup priority and create a group
+    group1_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "Ch1 Group"
+    )
 
     # Create channel 1 with a URL
     ch1_data = {
         "tvg_id": "ch1_url_mismatch.tv",
         "name": "CH1 URL Mismatch",
-        "group_title": "G1",
+        "group_id": str(group1_id),
         "tvg_name": "C1UMName",
         "tvg_logo": "c1umlogo.png",
         "urls": [{"url": "http://ch1.url", "priority_id": 100}],
@@ -707,11 +956,16 @@ def test_update_channel_url_channel_id_mismatch_is_url_not_found(
     ch1_resp = admin_user_client.post("/channels/", json=ch1_data)
     url_id_from_ch1 = ch1_resp.json()["urls"][0]["id"]
 
+    # Create another group
+    group2_id = create_mock_priorities_and_group(
+        db_session, [(200, "Medium")], "Ch2 Group"
+    )
+
     # Create channel 2
     ch2_data = {
         "tvg_id": "ch2_url_mismatch.tv",
         "name": "CH2 URL Mismatch",
-        "group_title": "G2",
+        "group_id": str(group2_id),
         "tvg_name": "C2UMName",
         "tvg_logo": "c2umlogo.png",
         "urls": [],
@@ -733,14 +987,15 @@ def test_update_channel_url_forbidden_for_non_admin(
     non_admin_user_client: TestClient,
     admin_user_client: TestClient,
 ):
-    # Setup priority and create channel with URL using admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group and create channel with URL using admin
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Update Forbidden Group"
+    )
+
     channel_data = {
         "tvg_id": "ch_update_url_forbidden.tv",
         "name": "Channel Update URL Forbidden",
-        "group_title": "URL Update Forbidden Group",
+        "group_id": str(group_id),
         "tvg_name": "CUFName",
         "tvg_logo": "cuflgo.png",
         "urls": [{"url": "http://original_forbidden.com/stream", "priority_id": 100}],
@@ -761,15 +1016,15 @@ def test_update_channel_url_forbidden_for_non_admin(
 
 
 def test_delete_channel_url_success(db_session: Session, admin_user_client: TestClient):
-    # Setup priority and create a channel with a URL
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group and create a channel with a URL
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Delete Group"
+    )
 
     channel_data = {
         "tvg_id": "ch_delete_url.tv",
         "name": "Channel Delete URL",
-        "group_title": "URL Delete Group",
+        "group_id": str(group_id),
         "tvg_name": "CDUName",
         "tvg_logo": "cdulogo.png",
         "urls": [{"url": "http://delete_this_url.com/stream", "priority_id": 100}],
@@ -781,7 +1036,7 @@ def test_delete_channel_url_success(db_session: Session, admin_user_client: Test
     # Verify URL exists before delete
     db_url_before = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(url_to_delete_id))
+        .filter(MockChannelURL.id == url_to_delete_id)
         .first()
     )
     assert db_url_before is not None
@@ -794,7 +1049,7 @@ def test_delete_channel_url_success(db_session: Session, admin_user_client: Test
     # Verify URL is gone from DB
     db_url_after = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(url_to_delete_id))
+        .filter(MockChannelURL.id == url_to_delete_id)
         .first()
     )
     assert db_url_after is None
@@ -808,14 +1063,15 @@ def test_delete_channel_url_success(db_session: Session, admin_user_client: Test
 def test_delete_channel_url_url_not_found(
     db_session: Session, admin_user_client: TestClient
 ):
-    # Setup priority and create a channel
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group and create a channel with a URL
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Del Not Found Group"
+    )
+
     channel_data = {
         "tvg_id": "ch_del_url_not_found.tv",
         "name": "Channel Del URL Not Found",
-        "group_title": "URL Del Not Found Group",
+        "group_id": str(group_id),
         "tvg_name": "CDUNFName",
         "tvg_logo": "cdunflogo.png",
         "urls": [],
@@ -834,9 +1090,8 @@ def test_delete_channel_url_url_not_found(
 def test_delete_channel_url_channel_id_mismatch_is_url_not_found(
     db_session: Session, admin_user_client: TestClient
 ):
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group 1 and create a channel 1 with a URL
+    group1_id = create_mock_priorities_and_group(db_session, [(100, "High")], "G1Del")
 
     # Create channel 1 with a URL
     ch1_data = {
@@ -844,20 +1099,23 @@ def test_delete_channel_url_channel_id_mismatch_is_url_not_found(
         "tvg_id": "ch1_del_url_mismatch.tv",
         "tvg_name": "CH1 Del URL Mismatch",
         "tvg_logo": "ch1delogo.png",
-        "group_title": "G1Del",
+        "group_id": str(group1_id),
         "urls": [{"url": "http://ch1del.url", "priority_id": 100}],
     }
     ch1_resp = admin_user_client.post("/channels/", json=ch1_data)
     print(ch1_resp.json())
     url_id_from_ch1 = ch1_resp.json()["urls"][0]["id"]
 
+    # Setup group 2 and create a channel 2
+    group2_id = create_mock_priorities_and_group(db_session, [], "G2Del")
+
     # Create channel 2
     ch2_data = {
         "tvg_id": "ch2_del_url_mismatch.tv",
         "name": "CH2 Del URL Mismatch",
         "tvg_name": "CH2 Del URL Mismatch",
         "tvg_logo": "ch2delogo.png",
-        "group_title": "G2Del",
+        "group_id": str(group2_id),
         "urls": [],
     }
     ch2_resp = admin_user_client.post("/channels/", json=ch2_data)
@@ -871,7 +1129,7 @@ def test_delete_channel_url_channel_id_mismatch_is_url_not_found(
     # Ensure the original URL on CH1 was not deleted
     db_url_ch1 = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(url_id_from_ch1))
+        .filter(MockChannelURL.id == url_id_from_ch1)
         .first()
     )
     assert db_url_ch1 is not None
@@ -882,14 +1140,15 @@ def test_delete_channel_url_forbidden_for_non_admin(
     non_admin_user_client: TestClient,
     admin_user_client: TestClient,
 ):
-    # Setup priority and create channel with URL using admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group and create a channel with a URL
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Del Forbidden Group"
+    )
+
     channel_data = {
         "tvg_id": "ch_del_url_forbidden.tv",
         "name": "Channel Del URL Forbidden",
-        "group_title": "URL Del Forbidden Group",
+        "group_id": str(group_id),
         "tvg_name": "CDUFName",
         "tvg_logo": "cduflogo.png",
         "urls": [
@@ -909,7 +1168,7 @@ def test_delete_channel_url_forbidden_for_non_admin(
     # Ensure URL was not deleted
     db_url_not_deleted = (
         db_session.query(MockChannelURL)
-        .filter(MockChannelURL.id.cast(String()) == uuid.UUID(initial_url_id))
+        .filter(MockChannelURL.id == initial_url_id)
         .first()
     )
     assert db_url_not_deleted is not None
@@ -919,16 +1178,15 @@ def test_delete_channel_url_forbidden_for_non_admin(
 
 
 def test_list_channel_urls_success(db_session: Session, admin_user_client: TestClient):
-    # Setup priorities and create a channel with multiple URLs
-    priority1 = MockPriority(id=100, description="High")
-    priority2 = MockPriority(id=200, description="Medium")
-    db_session.add_all([priority1, priority2])
-    db_session.commit()
+    # Setup priorities, group and create a channel with a URL
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High"), (200, "Medium")], "URL List Group"
+    )
 
     channel_data = {
         "tvg_id": "ch_list_urls.tv",
         "name": "Channel List URLs",
-        "group_title": "URL List Group",
+        "group_id": str(group_id),
         "tvg_name": "CLUName",
         "tvg_logo": "clulogo.png",
         "urls": [
@@ -961,10 +1219,14 @@ def test_list_channel_urls_success(db_session: Session, admin_user_client: TestC
 def test_list_channel_urls_empty(db_session: Session, admin_user_client: TestClient):
     # Create a channel with no URLs initially
     # No need to set up MockPriority if no URLs with priority_id are being created.
+
+    # Setup group
+    group_id = create_mock_priorities_and_group(db_session, [], "URL List Empty Group")
+
     channel_data = {
         "tvg_id": "ch_list_empty_urls.tv",
         "name": "Channel List Empty URLs",
-        "group_title": "URL List Empty Group",
+        "group_id": str(group_id),
         "tvg_name": "CLEUName",
         "tvg_logo": "cleulogo.png",
         "urls": [],
@@ -991,14 +1253,15 @@ def test_list_channel_urls_forbidden_for_non_admin(
     non_admin_user_client: TestClient,
     admin_user_client: TestClient,
 ):
-    # Setup priority and create channel with admin
-    priority1 = MockPriority(id=100, description="High")
-    db_session.add(priority1)
-    db_session.commit()
+    # Setup priority, group and create a channel admin
+    group_id = create_mock_priorities_and_group(
+        db_session, [(100, "High")], "URL Del Forbidden Group"
+    )
+
     channel_data = {
         "tvg_id": "ch_list_url_forbidden.tv",
         "name": "Channel List URL Forbidden",
-        "group_title": "URL List Forbidden Group",
+        "group_id": str(group_id),
         "tvg_name": "CLUFName",
         "tvg_logo": "cluflogo.png",
         "urls": [{"url": "http://list_url_forbidden.com", "priority_id": 100}],
diff --git a/tests/routers/test_groups.py b/tests/routers/test_groups.py
new file mode 100644
index 0000000..16f785b
--- /dev/null
+++ b/tests/routers/test_groups.py
@@ -0,0 +1,422 @@
+import uuid
+from datetime import datetime, timezone
+
+import pytest
+from fastapi import status
+from sqlalchemy.orm import Session
+
+from app.auth.dependencies import get_current_user
+from app.routers.groups import router as groups_router
+from app.utils.database import get_db
+
+# Import mocks and fixtures
+from tests.utils.auth_test_fixtures import (
+    admin_user_client,
+    db_session,
+    non_admin_user_client,
+)
+from tests.utils.db_mocks import MockChannelDB, MockGroup, SQLiteUUID
+
+# --- Test Cases For Group Creation ---
+
+
+def test_create_group_success(db_session: Session, admin_user_client):
+    group_data = {"name": "Test Group", "sort_order": 1}
+    response = admin_user_client.post("/groups/", json=group_data)
+    assert response.status_code == status.HTTP_201_CREATED
+    data = response.json()
+    assert data["name"] == "Test Group"
+    assert data["sort_order"] == 1
+    assert "id" in data
+    assert "created_at" in data
+    assert "updated_at" in data
+
+    # Verify in DB
+    db_group = (
+        db_session.query(MockGroup).filter(MockGroup.name == "Test Group").first()
+    )
+    assert db_group is not None
+    assert db_group.sort_order == 1
+
+
+def test_create_group_duplicate(db_session: Session, admin_user_client):
+    # Create initial group
+    initial_group = MockGroup(
+        id=uuid.uuid4(),
+        name="Duplicate Group",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(initial_group)
+    db_session.commit()
+
+    # Attempt to create duplicate
+    response = admin_user_client.post(
+        "/groups/", json={"name": "Duplicate Group", "sort_order": 2}
+    )
+    assert response.status_code == status.HTTP_409_CONFLICT
+    assert "already exists" in response.json()["detail"]
+
+
+def test_create_group_forbidden_for_non_admin(
+    db_session: Session, non_admin_user_client
+):
+    response = non_admin_user_client.post(
+        "/groups/", json={"name": "Forbidden Group", "sort_order": 1}
+    )
+    assert response.status_code == status.HTTP_403_FORBIDDEN
+    assert "required roles" in response.json()["detail"]
+
+
+# --- Test Cases For Get Group ---
+
+
+def test_get_group_success(db_session: Session, admin_user_client):
+    # Create a group first
+    test_group = MockGroup(
+        id=uuid.uuid4(),
+        name="Get Me Group",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    response = admin_user_client.get(f"/groups/{test_group.id}")
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert data["id"] == str(test_group.id)
+    assert data["name"] == "Get Me Group"
+    assert data["sort_order"] == 1
+
+
+def test_get_group_not_found(db_session: Session, admin_user_client):
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.get(f"/groups/{random_uuid}")
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+# --- Test Cases For Update Group ---
+
+
+def test_update_group_success(db_session: Session, admin_user_client):
+    # Create initial group
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Update Me",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    update_data = {"name": "Updated Name", "sort_order": 2}
+    response = admin_user_client.put(f"/groups/{group_id}", json=update_data)
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert data["name"] == "Updated Name"
+    assert data["sort_order"] == 2
+
+    # Verify in DB
+    db_group = db_session.query(MockGroup).filter(MockGroup.id == group_id).first()
+    assert db_group.name == "Updated Name"
+    assert db_group.sort_order == 2
+
+
+def test_update_group_conflict(db_session: Session, admin_user_client):
+    # Create two groups
+    group1 = MockGroup(
+        id=uuid.uuid4(),
+        name="Group One",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    group2 = MockGroup(
+        id=uuid.uuid4(),
+        name="Group Two",
+        sort_order=2,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add_all([group1, group2])
+    db_session.commit()
+
+    # Try to rename group2 to conflict with group1
+    response = admin_user_client.put(f"/groups/{group2.id}", json={"name": "Group One"})
+    assert response.status_code == status.HTTP_409_CONFLICT
+    assert "already exists" in response.json()["detail"]
+
+
+def test_update_group_not_found(db_session: Session, admin_user_client):
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.put(
+        f"/groups/{random_uuid}", json={"name": "Non-existent"}
+    )
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+def test_update_group_forbidden_for_non_admin(
+    db_session: Session, non_admin_user_client, admin_user_client
+):
+    # Create group with admin
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Admin Created",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    # Attempt update with non-admin
+    response = non_admin_user_client.put(
+        f"/groups/{group_id}", json={"name": "Non-Admin Update"}
+    )
+    assert response.status_code == status.HTTP_403_FORBIDDEN
+    assert "required roles" in response.json()["detail"]
+
+
+# --- Test Cases For Delete Group ---
+
+
+def test_delete_group_success(db_session: Session, admin_user_client):
+    # Create group
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Delete Me",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    # Verify exists before delete
+    assert (
+        db_session.query(MockGroup).filter(MockGroup.id == group_id).first() is not None
+    )
+
+    response = admin_user_client.delete(f"/groups/{group_id}")
+    assert response.status_code == status.HTTP_204_NO_CONTENT
+
+    # Verify deleted
+    assert db_session.query(MockGroup).filter(MockGroup.id == group_id).first() is None
+
+
+def test_delete_group_with_channels_fails(db_session: Session, admin_user_client):
+    # Create group with channel
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Group With Channels",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+
+    # Create channel in this group
+    test_channel = MockChannelDB(
+        id=uuid.uuid4(),
+        tvg_id="channel1.tv",
+        name="Channel 1",
+        group_id=group_id,
+        tvg_name="Channel1",
+        tvg_logo="logo.png",
+    )
+    db_session.add(test_channel)
+    db_session.commit()
+
+    response = admin_user_client.delete(f"/groups/{group_id}")
+    assert response.status_code == status.HTTP_400_BAD_REQUEST
+    assert "existing channels" in response.json()["detail"]
+
+    # Verify group still exists
+    assert (
+        db_session.query(MockGroup).filter(MockGroup.id == group_id).first() is not None
+    )
+
+
+def test_delete_group_not_found(db_session: Session, admin_user_client):
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.delete(f"/groups/{random_uuid}")
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+def test_delete_group_forbidden_for_non_admin(
+    db_session: Session, non_admin_user_client, admin_user_client
+):
+    # Create group with admin
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Admin Created",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    # Attempt delete with non-admin
+    response = non_admin_user_client.delete(f"/groups/{group_id}")
+    assert response.status_code == status.HTTP_403_FORBIDDEN
+    assert "required roles" in response.json()["detail"]
+
+    # Verify group still exists
+    assert (
+        db_session.query(MockGroup).filter(MockGroup.id == group_id).first() is not None
+    )
+
+
+# --- Test Cases For List Groups ---
+
+
+def test_list_groups_empty(db_session: Session, admin_user_client):
+    response = admin_user_client.get("/groups/")
+    assert response.status_code == status.HTTP_200_OK
+    assert response.json() == []
+
+
+def test_list_groups_with_data(db_session: Session, admin_user_client):
+    # Create some groups
+    groups = [
+        MockGroup(
+            id=uuid.uuid4(),
+            name=f"Group {i}",
+            sort_order=i,
+            created_at=datetime.now(timezone.utc),
+            updated_at=datetime.now(timezone.utc),
+        )
+        for i in range(3)
+    ]
+    db_session.add_all(groups)
+    db_session.commit()
+
+    response = admin_user_client.get("/groups/")
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert len(data) == 3
+    assert data[0]["sort_order"] == 0  # Should be sorted by sort_order
+    assert data[1]["sort_order"] == 1
+    assert data[2]["sort_order"] == 2
+
+
+# --- Test Cases For Sort Order Updates ---
+
+
+def test_update_group_sort_order_success(db_session: Session, admin_user_client):
+    # Create group
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Sort Me",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    response = admin_user_client.put(f"/groups/{group_id}/sort", json={"sort_order": 5})
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert data["sort_order"] == 5
+
+    # Verify in DB
+    db_group = db_session.query(MockGroup).filter(MockGroup.id == group_id).first()
+    assert db_group.sort_order == 5
+
+
+def test_update_group_sort_order_not_found(db_session: Session, admin_user_client):
+    """Test that updating sort order for non-existent group returns 404"""
+    random_uuid = uuid.uuid4()
+    response = admin_user_client.put(
+        f"/groups/{random_uuid}/sort", json={"sort_order": 5}
+    )
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "Group not found" in response.json()["detail"]
+
+
+def test_bulk_update_sort_orders_success(db_session: Session, admin_user_client):
+    # Create groups
+    groups = [
+        MockGroup(
+            id=uuid.uuid4(),
+            name=f"Group {i}",
+            sort_order=i,
+            created_at=datetime.now(timezone.utc),
+            updated_at=datetime.now(timezone.utc),
+        )
+        for i in range(3)
+    ]
+    print(groups)
+    db_session.add_all(groups)
+    db_session.commit()
+
+    # Bulk update sort orders (reverse order)
+    bulk_data = {
+        "groups": [
+            {"group_id": str(groups[0].id), "sort_order": 2},
+            {"group_id": str(groups[1].id), "sort_order": 1},
+            {"group_id": str(groups[2].id), "sort_order": 0},
+        ]
+    }
+    response = admin_user_client.post("/groups/reorder", json=bulk_data)
+    assert response.status_code == status.HTTP_200_OK
+    data = response.json()
+    assert len(data) == 3
+
+    # Create a dictionary for easy lookup of returned group data by ID
+    returned_groups_map = {item["id"]: item for item in data}
+
+    # Verify each group has its expected new sort_order
+    assert returned_groups_map[str(groups[0].id)]["sort_order"] == 2
+    assert returned_groups_map[str(groups[1].id)]["sort_order"] == 1
+    assert returned_groups_map[str(groups[2].id)]["sort_order"] == 0
+
+    # Verify in DB
+    db_groups = db_session.query(MockGroup).order_by(MockGroup.sort_order).all()
+    assert db_groups[0].sort_order == 2
+    assert db_groups[1].sort_order == 1
+    assert db_groups[2].sort_order == 0
+
+
+def test_bulk_update_sort_orders_invalid_group(db_session: Session, admin_user_client):
+    # Create one group
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Valid Group",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add(test_group)
+    db_session.commit()
+
+    # Try to update with invalid group
+    bulk_data = {
+        "groups": [
+            {"group_id": str(group_id), "sort_order": 2},
+            {"group_id": str(uuid.uuid4()), "sort_order": 1},  # Invalid group
+        ]
+    }
+    response = admin_user_client.post("/groups/reorder", json=bulk_data)
+    assert response.status_code == status.HTTP_404_NOT_FOUND
+    assert "not found" in response.json()["detail"]
+
+    # Verify original sort order unchanged
+    db_group = db_session.query(MockGroup).filter(MockGroup.id == group_id).first()
+    assert db_group.sort_order == 1
diff --git a/tests/routers/test_priorities.py b/tests/routers/test_priorities.py
index 1673bb8..1390520 100644
--- a/tests/routers/test_priorities.py
+++ b/tests/routers/test_priorities.py
@@ -1,3 +1,6 @@
+import uuid
+from datetime import datetime, timezone
+
 import pytest
 from fastapi import status
 from sqlalchemy.orm import Session
@@ -11,7 +14,7 @@ from tests.utils.auth_test_fixtures import (
     db_session,
     non_admin_user_client,
 )
-from tests.utils.db_mocks import MockChannelDB, MockChannelURL, MockPriority
+from tests.utils.db_mocks import MockChannelDB, MockChannelURL, MockGroup, MockPriority
 
 # --- Test Cases For Priority Creation ---
 
@@ -147,7 +150,15 @@ def test_delete_priority_not_found(db_session: Session, admin_user_client):
 def test_delete_priority_in_use(db_session: Session, admin_user_client):
     # Create a priority and a channel URL using it
     priority = MockPriority(id=100, description="In Use")
-    db_session.add(priority)
+    group_id = uuid.uuid4()
+    test_group = MockGroup(
+        id=group_id,
+        name="Group With Channels",
+        sort_order=1,
+        created_at=datetime.now(timezone.utc),
+        updated_at=datetime.now(timezone.utc),
+    )
+    db_session.add_all([priority, test_group])
     db_session.commit()
 
     # Create a channel first
@@ -156,7 +167,7 @@ def test_delete_priority_in_use(db_session: Session, admin_user_client):
         tvg_id="test.tv",
         tvg_name="Test",
         tvg_logo="test.png",
-        group_title="Test Group",
+        group_id=group_id,
     )
     db_session.add(channel)
     db_session.commit()
diff --git a/tests/utils/auth_test_fixtures.py b/tests/utils/auth_test_fixtures.py
index 0f95630..d212480 100644
--- a/tests/utils/auth_test_fixtures.py
+++ b/tests/utils/auth_test_fixtures.py
@@ -6,6 +6,7 @@ from sqlalchemy.orm import Session
 from app.auth.dependencies import get_current_user
 from app.models.auth import CognitoUser
 from app.routers.channels import router as channels_router
+from app.routers.groups import router as groups_router
 from app.routers.playlist import router as playlist_router
 from app.routers.priorities import router as priorities_router
 from app.utils.database import get_db
@@ -60,6 +61,7 @@ def admin_user_client(db_session: Session):
     test_app.include_router(channels_router)
     test_app.include_router(priorities_router)
     test_app.include_router(playlist_router)
+    test_app.include_router(groups_router)
     test_app.dependency_overrides[get_db] = mock_get_db
     test_app.dependency_overrides[get_current_user] = mock_get_current_user_admin
     with TestClient(test_app) as test_client:
@@ -73,6 +75,7 @@ def non_admin_user_client(db_session: Session):
     test_app.include_router(channels_router)
     test_app.include_router(priorities_router)
     test_app.include_router(playlist_router)
+    test_app.include_router(groups_router)
     test_app.dependency_overrides[get_db] = mock_get_db
     test_app.dependency_overrides[get_current_user] = mock_get_current_user_non_admin
     with TestClient(test_app) as test_client:
diff --git a/tests/utils/db_mocks.py b/tests/utils/db_mocks.py
index 4427282..ab22477 100644
--- a/tests/utils/db_mocks.py
+++ b/tests/utils/db_mocks.py
@@ -4,41 +4,25 @@ from unittest.mock import MagicMock, patch
 
 import pytest
 from sqlalchemy import (
-    TEXT,
     Boolean,
     Column,
     DateTime,
     ForeignKey,
     Integer,
     String,
-    TypeDecorator,
     UniqueConstraint,
     create_engine,
 )
-from sqlalchemy.orm import declarative_base, sessionmaker
+from sqlalchemy.orm import declarative_base, relationship, sessionmaker
 from sqlalchemy.pool import StaticPool
 
+# Import the actual UUID_COLUMN_TYPE and SQLiteUUID from app.models.db
+from app.models.db import UUID_COLUMN_TYPE, SQLiteUUID
+
 # Create a mock-specific Base class for testing
 MockBase = declarative_base()
 
 
-class SQLiteUUID(TypeDecorator):
-    """Enables UUID support for SQLite."""
-
-    impl = TEXT
-    cache_ok = True
-
-    def process_bind_param(self, value, dialect):
-        if value is None:
-            return value
-        return str(value)
-
-    def process_result_value(self, value, dialect):
-        if value is None:
-            return value
-        return uuid.UUID(value)
-
-
 # Model classes for testing - prefix with Mock to avoid pytest collection
 class MockPriority(MockBase):
     __tablename__ = "priorities"
@@ -46,16 +30,28 @@ class MockPriority(MockBase):
     description = Column(String, nullable=False)
 
 
+class MockGroup(MockBase):
+    __tablename__ = "groups"
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
+    name = Column(String, nullable=False, unique=True)
+    sort_order = Column(Integer, nullable=False, default=0)
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(
+        DateTime,
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+    channels = relationship("MockChannelDB", back_populates="group")
+
+
 class MockChannelDB(MockBase):
     __tablename__ = "channels"
-    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
     tvg_id = Column(String, nullable=False)
     name = Column(String, nullable=False)
-    group_title = Column(String, nullable=False)
+    group_id = Column(UUID_COLUMN_TYPE, ForeignKey("groups.id"), nullable=False)
     tvg_name = Column(String)
-    __table_args__ = (
-        UniqueConstraint("group_title", "name", name="uix_group_title_name"),
-    )
+    __table_args__ = (UniqueConstraint("group_id", "name", name="uix_group_id_name"),)
     tvg_logo = Column(String)
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
     updated_at = Column(
@@ -63,13 +59,14 @@ class MockChannelDB(MockBase):
         default=lambda: datetime.now(timezone.utc),
         onupdate=lambda: datetime.now(timezone.utc),
     )
+    group = relationship("MockGroup", back_populates="channels")
 
 
 class MockChannelURL(MockBase):
     __tablename__ = "channels_urls"
-    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
+    id = Column(UUID_COLUMN_TYPE, primary_key=True, default=uuid.uuid4)
     channel_id = Column(
-        SQLiteUUID(), ForeignKey("channels.id", ondelete="CASCADE"), nullable=False
+        UUID_COLUMN_TYPE, ForeignKey("channels.id", ondelete="CASCADE"), nullable=False
     )
     url = Column(String, nullable=False)
     in_use = Column(Boolean, default=False, nullable=False)
@@ -82,6 +79,31 @@ class MockChannelURL(MockBase):
     )
 
 
+def create_mock_priorities_and_group(db_session, priorities, group_name):
+    """Create mock priorities and group for testing purposes.
+
+    Args:
+        db_session: SQLAlchemy session object
+        priorities: List of (id, description) tuples for priorities to create
+        group_name: Name for the new mock group
+
+    Returns:
+        UUID: The ID of the created group
+    """
+    # Create priorities
+    priority_objects = [
+        MockPriority(id=priority_id, description=description)
+        for priority_id, description in priorities
+    ]
+
+    # Create group
+    group = MockGroup(name=group_name)
+    db_session.add_all(priority_objects + [group])
+    db_session.commit()
+
+    return group.id
+
+
 # Create test engine
 engine_mock = create_engine(
     "sqlite:///:memory:",