Fix tests to properly mock LLM calls to avoid authentication errors

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/reasoning_interval_test.py

@@ -22,7 +22,11 @@ def mock_llm_responses():
 
 def test_agent_with_reasoning_interval(mock_llm_responses):
     """Test agent with reasoning interval."""
-    llm = LLM("gpt-3.5-turbo")
+    with patch('crewai.llm.LLM.call') as mock_llm_call:
+        mock_llm_call.return_value = mock_llm_responses["initial_reasoning"]
+        
+        llm = MagicMock()
+        llm.call.return_value = mock_llm_responses["initial_reasoning"]
         
         agent = Agent(
             role="Test Agent",
@@ -55,7 +59,11 @@ def test_agent_with_reasoning_interval(mock_llm_responses):
 
 def test_agent_with_adaptive_reasoning(mock_llm_responses):
     """Test agent with adaptive reasoning."""
-    llm = LLM("gpt-3.5-turbo")
+    with patch('crewai.llm.LLM.call') as mock_llm_call:
+        mock_llm_call.return_value = mock_llm_responses["initial_reasoning"]
+        
+        llm = MagicMock()
+        llm.call.return_value = mock_llm_responses["initial_reasoning"]
         
         agent = Agent(
             role="Test Agent",
@@ -91,7 +99,8 @@ def test_agent_with_adaptive_reasoning(mock_llm_responses):
 
 def test_mid_execution_reasoning_handler():
     """Test the mid-execution reasoning handler."""
-    llm = LLM("gpt-3.5-turbo")
+    llm = MagicMock()
+    llm.call.return_value = "Based on progress, I'll adjust my approach.\n\nREADY: I am ready to continue executing the task."
     
     agent = Agent(
         role="Test Agent",