diff --git a/tests/utils/test_database.py b/tests/utils/test_database.py
index cbeeec2..164c338 100644
--- a/tests/utils/test_database.py
+++ b/tests/utils/test_database.py
@@ -107,6 +107,16 @@ def test_get_db_credentials_ssm(mock_ssm):
     assert "postgresql://mocked_value:mocked_value@mocked_value/mocked_value" in conn_str
     mock_ssm.get_parameter.assert_called()
 
+def test_get_db_credentials_ssm_exception(mock_ssm):
+    """Test SSM credential fetching failure raises RuntimeError"""
+    os.environ.pop("MOCK_AUTH", None)
+    mock_ssm.get_parameter.side_effect = Exception("SSM timeout")
+    
+    with pytest.raises(RuntimeError) as excinfo:
+        get_db_credentials()
+    
+    assert "Failed to fetch DB credentials from SSM: SSM timeout" in str(excinfo.value)
+
 def test_session_creation():
     """Test database session creation"""
     session = session_mock()
@@ -121,4 +131,20 @@ def test_get_db_generator():
     try:
         next(db_gen)  # Should raise StopIteration
     except StopIteration:
-        pass
\ No newline at end of file
+        pass
+
+def test_init_db(mocker, mock_env):
+    """Test database initialization creates tables"""
+    mock_create_all = mocker.patch('app.models.Base.metadata.create_all')
+    
+    # Mock get_db_credentials to return SQLite test connection
+    mocker.patch(
+        'app.utils.database.get_db_credentials',
+        return_value="sqlite:///:memory:"
+    )
+    
+    from app.utils.database import init_db, engine
+    init_db()
+    
+    # Verify create_all was called with the engine
+    mock_create_all.assert_called_once_with(bind=engine)
\ No newline at end of file