Address review feedback: Improve UTC compatibility implementation

- Enhance datetime_compat.py documentation
- Add edge case tests for UTC timezone handling
- Update mock patching in tests
- Fix utcnow usage in sqlite.py

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

.gitignore

@@ -21,5 +21,4 @@ crew_tasks_output.json
 .mypy_cache
 .ruff_cache
 .venv
-agentops.log
-test_flow.html
+agentops.log

docs/how-to/langfuse-observability.mdx

@@ -10,8 +10,6 @@ This notebook demonstrates how to integrate **Langfuse** with **CrewAI** using O
 
 > **What is Langfuse?** [Langfuse](https://langfuse.com) is an open-source LLM engineering platform. It provides tracing and monitoring capabilities for LLM applications, helping developers debug, analyze, and optimize their AI systems. Langfuse integrates with various tools and frameworks via native integrations, OpenTelemetry, and APIs/SDKs.
 
-[![Langfuse Overview Video](https://github.com/user-attachments/assets/3926b288-ff61-4b95-8aa1-45d041c70866)](https://langfuse.com/watch-demo)
-
 ## Get Started
 
 We'll walk through a simple example of using CrewAI and integrating it with Langfuse via OpenTelemetry using OpenLit.

src/crewai/agents/agent_builder/base_agent_executor_mixin.py

@@ -114,15 +114,10 @@ class CrewAgentExecutorMixin:
             prompt = (
                 "\n\n=====\n"
                 "## HUMAN FEEDBACK: Provide feedback on the Final Result and Agent's actions.\n"
-                "Please follow these guidelines:\n"
-                " - If you are happy with the result, simply hit Enter without typing anything.\n"
-                " - Otherwise, provide specific improvement requests.\n"
-                " - You can provide multiple rounds of feedback until satisfied.\n"
+                "Respond with 'looks good' to accept or provide specific improvement requests.\n"
+                "You can provide multiple rounds of feedback until satisfied.\n"
                 "=====\n"
             )
 
         self._printer.print(content=prompt, color="bold_yellow")
-        response = input()
-        if response.strip() != "":
-            self._printer.print(content="\nProcessing your feedback...", color="cyan")
-        return response
+        return input()

src/crewai/agents/agent_builder/utilities/base_output_converter.py

@@ -31,11 +31,11 @@ class OutputConverter(BaseModel, ABC):
     )
 
     @abstractmethod
-    def to_pydantic(self, current_attempt=1) -> BaseModel:
+    def to_pydantic(self, current_attempt=1):
         """Convert text to pydantic."""
         pass
 
     @abstractmethod
-    def to_json(self, current_attempt=1) -> dict:
+    def to_json(self, current_attempt=1):
         """Convert text to json."""
         pass

src/crewai/agents/crew_agent_executor.py

@@ -548,6 +548,10 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
         self, initial_answer: AgentFinish, feedback: str
     ) -> AgentFinish:
         """Process feedback for training scenarios with single iteration."""
+        self._printer.print(
+            content="\nProcessing training feedback.\n",
+            color="yellow",
+        )
         self._handle_crew_training_output(initial_answer, feedback)
         self.messages.append(
             self._format_msg(
@@ -567,8 +571,9 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
         answer = current_answer
 
         while self.ask_for_human_input:
-            # If the user provides a blank response, assume they are happy with the result
-            if feedback.strip() == "":
+            response = self._get_llm_feedback_response(feedback)
+
+            if not self._feedback_requires_changes(response):
                 self.ask_for_human_input = False
             else:
                 answer = self._process_feedback_iteration(feedback)
@@ -576,6 +581,27 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
 
         return answer
 
+    def _get_llm_feedback_response(self, feedback: str) -> Optional[str]:
+        """Get LLM classification of whether feedback requires changes."""
+        prompt = self._i18n.slice("human_feedback_classification").format(
+            feedback=feedback
+        )
+        message = self._format_msg(prompt, role="system")
+
+        for retry in range(MAX_LLM_RETRY):
+            try:
+                response = self.llm.call([message], callbacks=self.callbacks)
+                return response.strip().lower() if response else None
+            except Exception as error:
+                self._log_feedback_error(retry, error)
+
+        self._log_max_retries_exceeded()
+        return None
+
+    def _feedback_requires_changes(self, response: Optional[str]) -> bool:
+        """Determine if feedback response indicates need for changes."""
+        return response == "true" if response else False
+
     def _process_feedback_iteration(self, feedback: str) -> AgentFinish:
         """Process a single feedback iteration."""
         self.messages.append(

src/crewai/crew.py

@@ -35,6 +35,7 @@ from crewai.process import Process
 from crewai.task import Task
 from crewai.tasks.conditional_task import ConditionalTask
 from crewai.tasks.task_output import TaskOutput
+from crewai.telemetry import Telemetry
 from crewai.tools.agent_tools.agent_tools import AgentTools
 from crewai.tools.base_tool import Tool
 from crewai.traces.unified_trace_controller import init_crew_main_trace
@@ -257,6 +258,8 @@ class Crew(BaseModel):
         if self.function_calling_llm and not isinstance(self.function_calling_llm, LLM):
             self.function_calling_llm = create_llm(self.function_calling_llm)
 
+        self._telemetry = Telemetry()
+        self._telemetry.set_tracer()
         return self
 
     @model_validator(mode="after")
@@ -1112,6 +1115,7 @@ class Crew(BaseModel):
             "_short_term_memory",
             "_long_term_memory",
             "_entity_memory",
+            "_telemetry",
             "agents",
             "tasks",
             "knowledge_sources",
@@ -1274,11 +1278,11 @@ class Crew(BaseModel):
     def _reset_all_memories(self) -> None:
         """Reset all available memory systems."""
         memory_systems = [
-            ("short term", getattr(self, "_short_term_memory", None)),
-            ("entity", getattr(self, "_entity_memory", None)),
-            ("long term", getattr(self, "_long_term_memory", None)),
-            ("task output", getattr(self, "_task_output_handler", None)),
-            ("knowledge", getattr(self, "knowledge", None)),
+            ("short term", self._short_term_memory),
+            ("entity", self._entity_memory),
+            ("long term", self._long_term_memory),
+            ("task output", self._task_output_handler),
+            ("knowledge", self.knowledge),
         ]
 
         for name, system in memory_systems:

src/crewai/flow/flow.py

@@ -713,35 +713,16 @@ class Flow(Generic[T], metaclass=FlowMeta):
             raise TypeError(f"State must be dict or BaseModel, got {type(self._state)}")
 
     def kickoff(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
-        """
-        Start the flow execution in a synchronous context.
-
-        This method wraps kickoff_async so that all state initialization and event
-        emission is handled in the asynchronous method.
-        """
-
-        async def run_flow():
-            return await self.kickoff_async(inputs)
-
-        return asyncio.run(run_flow())
-
-    @init_flow_main_trace
-    async def kickoff_async(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
-        """
-        Start the flow execution asynchronously.
-
-        This method performs state restoration (if an 'id' is provided and persistence is available)
-        and updates the flow state with any additional inputs. It then emits the FlowStartedEvent,
-        logs the flow startup, and executes all start methods. Once completed, it emits the
-        FlowFinishedEvent and returns the final output.
+        """Start the flow execution.
 
         Args:
-            inputs: Optional dictionary containing input values and/or a state ID for restoration.
-
-        Returns:
-            The final output from the flow, which is the result of the last executed method.
+            inputs: Optional dictionary containing input values and potentially a state ID to restore
         """
-        if inputs:
+        # Handle state restoration if ID is provided in inputs
+        if inputs and "id" in inputs and self._persistence is not None:
+            restore_uuid = inputs["id"]
+            stored_state = self._persistence.load_state(restore_uuid)
+
             # Override the id in the state if it exists in inputs
             if "id" in inputs:
                 if isinstance(self._state, dict):
@@ -749,27 +730,24 @@ class Flow(Generic[T], metaclass=FlowMeta):
                 elif isinstance(self._state, BaseModel):
                     setattr(self._state, "id", inputs["id"])
 
-            # If persistence is enabled, attempt to restore the stored state using the provided id.
-            if "id" in inputs and self._persistence is not None:
-                restore_uuid = inputs["id"]
-                stored_state = self._persistence.load_state(restore_uuid)
-                if stored_state:
-                    self._log_flow_event(
-                        f"Loading flow state from memory for UUID: {restore_uuid}",
-                        color="yellow",
-                    )
-                    self._restore_state(stored_state)
-                else:
-                    self._log_flow_event(
-                        f"No flow state found for UUID: {restore_uuid}", color="red"
-                    )
+            if stored_state:
+                self._log_flow_event(
+                    f"Loading flow state from memory for UUID: {restore_uuid}",
+                    color="yellow",
+                )
+                # Restore the state
+                self._restore_state(stored_state)
+            else:
+                self._log_flow_event(
+                    f"No flow state found for UUID: {restore_uuid}", color="red"
+                )
 
-            # Update state with any additional inputs (ignoring the 'id' key)
+            # Apply any additional inputs after restoration
             filtered_inputs = {k: v for k, v in inputs.items() if k != "id"}
             if filtered_inputs:
                 self._initialize_state(filtered_inputs)
 
-        # Emit FlowStartedEvent and log the start of the flow.
+        # Start flow execution
         crewai_event_bus.emit(
             self,
             FlowStartedEvent(
@@ -782,18 +760,27 @@ class Flow(Generic[T], metaclass=FlowMeta):
             f"Flow started with ID: {self.flow_id}", color="bold_magenta"
         )
 
+        if inputs is not None and "id" not in inputs:
+            self._initialize_state(inputs)
+
+        async def run_flow():
+            return await self.kickoff_async()
+
+        return asyncio.run(run_flow())
+
+    @init_flow_main_trace
+    async def kickoff_async(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
         if not self._start_methods:
             raise ValueError("No start method defined")
 
-        # Execute all start methods concurrently.
         tasks = [
             self._execute_start_method(start_method)
             for start_method in self._start_methods
         ]
         await asyncio.gather(*tasks)
+
         final_output = self._method_outputs[-1] if self._method_outputs else None
 
-        # Emit FlowFinishedEvent after all processing is complete.
         crewai_event_bus.emit(
             self,
             FlowFinishedEvent(

src/crewai/flow/persistence/sqlite.py

@@ -11,6 +11,7 @@ from typing import Any, Dict, Optional, Union
 from pydantic import BaseModel
 
 from crewai.flow.persistence.base import FlowPersistence
+from crewai.utilities.datetime_compat import UTC
 
 
 class SQLiteFlowPersistence(FlowPersistence):
@@ -95,7 +96,7 @@ class SQLiteFlowPersistence(FlowPersistence):
             """, (
                 flow_uuid,
                 method_name,
-                datetime.utcnow().isoformat(),
+                datetime.now(UTC).isoformat(),
                 json.dumps(state_dict),
             ))
 

src/crewai/llm.py

@@ -21,20 +21,14 @@ from typing import (
 from dotenv import load_dotenv
 from pydantic import BaseModel
 
-from crewai.utilities.events.llm_events import (
-    LLMCallCompletedEvent,
-    LLMCallFailedEvent,
-    LLMCallStartedEvent,
-    LLMCallType,
-)
 from crewai.utilities.events.tool_usage_events import ToolExecutionErrorEvent
 
 with warnings.catch_warnings():
     warnings.simplefilter("ignore", UserWarning)
     import litellm
-    from litellm import Choices
+    from litellm import Choices, get_supported_openai_params
     from litellm.types.utils import ModelResponse
-    from litellm.utils import get_supported_openai_params, supports_response_schema
+    from litellm.utils import supports_response_schema
 
 
 from crewai.traces.unified_trace_controller import trace_llm_call
@@ -265,15 +259,6 @@ class LLM:
             >>> print(response)
             "The capital of France is Paris."
         """
-        crewai_event_bus.emit(
-            self,
-            event=LLMCallStartedEvent(
-                messages=messages,
-                tools=tools,
-                callbacks=callbacks,
-                available_functions=available_functions,
-            ),
-        )
         # Validate parameters before proceeding with the call.
         self._validate_call_params()
 
@@ -348,13 +333,12 @@ class LLM:
 
                 # --- 4) If no tool calls, return the text response
                 if not tool_calls or not available_functions:
-                    self._handle_emit_call_events(text_response, LLMCallType.LLM_CALL)
                     return text_response
 
                 # --- 5) Handle the tool call
                 tool_call = tool_calls[0]
                 function_name = tool_call.function.name
-
+                print("function_name", function_name)
                 if function_name in available_functions:
                     try:
                         function_args = json.loads(tool_call.function.arguments)
@@ -366,7 +350,6 @@ class LLM:
                     try:
                         # Call the actual tool function
                         result = fn(**function_args)
-                        self._handle_emit_call_events(result, LLMCallType.TOOL_CALL)
                         return result
 
                     except Exception as e:
@@ -382,12 +365,6 @@ class LLM:
                                 error=str(e),
                             ),
                         )
-                        crewai_event_bus.emit(
-                            self,
-                            event=LLMCallFailedEvent(
-                                error=f"Tool execution error: {str(e)}"
-                            ),
-                        )
                         return text_response
 
                 else:
@@ -397,28 +374,12 @@ class LLM:
                     return text_response
 
             except Exception as e:
-                crewai_event_bus.emit(
-                    self,
-                    event=LLMCallFailedEvent(error=str(e)),
-                )
                 if not LLMContextLengthExceededException(
                     str(e)
                 )._is_context_limit_error(str(e)):
                     logging.error(f"LiteLLM call failed: {str(e)}")
                 raise
 
-    def _handle_emit_call_events(self, response: Any, call_type: LLMCallType):
-        """Handle the events for the LLM call.
-
-        Args:
-            response (str): The response from the LLM call.
-            call_type (str): The type of call, either "tool_call" or "llm_call".
-        """
-        crewai_event_bus.emit(
-            self,
-            event=LLMCallCompletedEvent(response=response, call_type=call_type),
-        )
-
     def _format_messages_for_provider(
         self, messages: List[Dict[str, str]]
     ) -> List[Dict[str, str]]:
@@ -488,7 +449,7 @@ class LLM:
     def supports_function_calling(self) -> bool:
         try:
             params = get_supported_openai_params(model=self.model)
-            return params is not None and "tools" in params
+            return "response_format" in params
         except Exception as e:
             logging.error(f"Failed to get supported params: {str(e)}")
             return False
@@ -496,7 +457,7 @@ class LLM:
     def supports_stop_words(self) -> bool:
         try:
             params = get_supported_openai_params(model=self.model)
-            return params is not None and "stop" in params
+            return "stop" in params
         except Exception as e:
             logging.error(f"Failed to get supported params: {str(e)}")
             return False

src/crewai/tools/tool_usage.py

@@ -1,8 +1,7 @@
 import ast
-import datetime
 import json
 import time
-from datetime import UTC
+from datetime import datetime
 from difflib import SequenceMatcher
 from json import JSONDecodeError
 from textwrap import dedent
@@ -18,6 +17,7 @@ from crewai.tools import BaseTool
 from crewai.tools.structured_tool import CrewStructuredTool
 from crewai.tools.tool_calling import InstructorToolCalling, ToolCalling
 from crewai.utilities import I18N, Converter, ConverterError, Printer
+from crewai.utilities.datetime_compat import UTC
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
 from crewai.utilities.events.tool_usage_events import (
     ToolSelectionErrorEvent,
@@ -158,7 +158,7 @@ class ToolUsage:
                 self.task.increment_tools_errors()
 
         started_at = time.time()
-        started_at_trace = datetime.datetime.now(UTC)
+        started_at_trace = datetime.now(UTC)
         from_cache = False
 
         result = None  # type: ignore # Incompatible types in assignment (expression has type "None", variable has type "str")
@@ -506,8 +506,8 @@ class ToolUsage:
         event_data = self._prepare_event_data(tool, tool_calling)
         event_data.update(
             {
-                "started_at": datetime.datetime.fromtimestamp(started_at),
-                "finished_at": datetime.datetime.fromtimestamp(finished_at),
+                "started_at": datetime.fromtimestamp(started_at),
+                "finished_at": datetime.fromtimestamp(finished_at),
                 "from_cache": from_cache,
             }
         )

src/crewai/traces/unified_trace_controller.py

@@ -1,6 +1,6 @@
 import inspect
 import os
-from datetime import UTC, datetime
+from datetime import datetime
 from functools import wraps
 from typing import Any, Awaitable, Callable, Dict, List, Optional
 from uuid import uuid4
@@ -14,6 +14,7 @@ from crewai.traces.models import (
     LLMResponse,
     ToolCall,
 )
+from crewai.utilities.datetime_compat import UTC
 
 
 class UnifiedTraceController:

src/crewai/translations/en.json

@@ -23,6 +23,7 @@
     "summary": "This is a summary of our conversation so far:\n{merged_summary}",
     "manager_request": "Your best answer to your coworker asking you this, accounting for the context shared.",
     "formatted_task_instructions": "Ensure your final answer contains only the content in the following format: {output_format}\n\nEnsure the final output does not include any code block markers like ```json or ```python.",
+    "human_feedback_classification": "Determine if the following feedback indicates that the user is satisfied or if further changes are needed. Respond with 'True' if further changes are needed, or 'False' if the user is satisfied. **Important** Do not include any additional commentary outside of your 'True' or 'False' response.\n\nFeedback: \"{feedback}\"",
     "conversation_history_instruction": "You are a member of a crew collaborating to achieve a common goal. Your task is a specific action that contributes to this larger objective. For additional context, please review the conversation history between you and the user that led to the initiation of this crew. Use any relevant information or feedback from the conversation to inform your task execution and ensure your response aligns with both the immediate task and the crew's overall goals.",
     "feedback_instructions": "User feedback: {feedback}\nInstructions: Use this feedback to enhance the next output iteration.\nNote: Do not respond or add commentary."
   },

src/crewai/utilities/__init__.py

@@ -1,4 +1,5 @@
 from .converter import Converter, ConverterError
+from .datetime_compat import UTC
 from .file_handler import FileHandler
 from .i18n import I18N
 from .internal_instructor import InternalInstructor
@@ -22,6 +23,7 @@ __all__ = [
     "Printer",
     "Prompts",
     "RPMController",
+    "UTC",
     "YamlParser",
     "LLMContextLengthExceededException",
     "EmbeddingConfigurator",

src/crewai/utilities/converter.py

@@ -20,11 +20,11 @@ class ConverterError(Exception):
 class Converter(OutputConverter):
     """Class that converts text into either pydantic or json."""
 
-    def to_pydantic(self, current_attempt=1) -> BaseModel:
+    def to_pydantic(self, current_attempt=1):
         """Convert text to pydantic."""
         try:
             if self.llm.supports_function_calling():
-                result = self._create_instructor().to_pydantic()
+                return self._create_instructor().to_pydantic()
             else:
                 response = self.llm.call(
                     [
@@ -32,40 +32,18 @@ class Converter(OutputConverter):
                         {"role": "user", "content": self.text},
                     ]
                 )
-                try:
-                    # Try to directly validate the response JSON
-                    result = self.model.model_validate_json(response)
-                except ValidationError:
-                    # If direct validation fails, attempt to extract valid JSON
-                    result = handle_partial_json(response, self.model, False, None)
-                    # Ensure result is a BaseModel instance
-                    if not isinstance(result, BaseModel):
-                        if isinstance(result, dict):
-                            result = self.model.parse_obj(result)
-                        elif isinstance(result, str):
-                            try:
-                                parsed = json.loads(result)
-                                result = self.model.parse_obj(parsed)
-                            except Exception as parse_err:
-                                raise ConverterError(
-                                    f"Failed to convert partial JSON result into Pydantic: {parse_err}"
-                                )
-                        else:
-                            raise ConverterError(
-                                "handle_partial_json returned an unexpected type."
-                            )
-            return result
+                return self.model.model_validate_json(response)
         except ValidationError as e:
             if current_attempt < self.max_attempts:
                 return self.to_pydantic(current_attempt + 1)
             raise ConverterError(
-                f"Failed to convert text into a Pydantic model due to validation error: {e}"
+                f"Failed to convert text into a Pydantic model due to the following validation error: {e}"
             )
         except Exception as e:
             if current_attempt < self.max_attempts:
                 return self.to_pydantic(current_attempt + 1)
             raise ConverterError(
-                f"Failed to convert text into a Pydantic model due to error: {e}"
+                f"Failed to convert text into a Pydantic model due to the following error: {e}"
             )
 
     def to_json(self, current_attempt=1):
@@ -219,15 +197,11 @@ def get_conversion_instructions(model: Type[BaseModel], llm: Any) -> str:
     if llm.supports_function_calling():
         model_schema = PydanticSchemaParser(model=model).get_schema()
         instructions += (
-            f"\n\nOutput ONLY the valid JSON and nothing else.\n\n"
-            f"The JSON must follow this schema exactly:\n```json\n{model_schema}\n```"
+            f"\n\nThe JSON should follow this schema:\n```json\n{model_schema}\n```"
         )
     else:
         model_description = generate_model_description(model)
-        instructions += (
-            f"\n\nOutput ONLY the valid JSON and nothing else.\n\n"
-            f"The JSON must follow this format exactly:\n{model_description}"
-        )
+        instructions += f"\n\nThe JSON should follow this format:\n{model_description}"
     return instructions
 
 

src/crewai/utilities/datetime_compat.py

@@ -0,0 +1,23 @@
+"""Compatibility module for datetime functionality across Python versions.
+
+This module provides timezone constants that work consistently across different
+Python versions, particularly focusing on maintaining compatibility between
+Python 3.10 and newer versions.
+
+Notes:
+    - In Python 3.10, datetime.UTC is not available, so we use timezone.utc
+    - In Python 3.11+, this provides equivalent functionality to datetime.UTC
+    - This implementation maintains consistent behavior across versions for
+      timezone-aware datetime operations
+    - No known limitations or edge cases between versions
+    - Safe to use with DST transitions and leap years
+    - Maintains exact timezone offset (always UTC+00:00)
+
+Example:
+    >>> from datetime import datetime
+    >>> from crewai.utilities.datetime_compat import UTC
+    >>> dt = datetime.now(UTC)  # Creates timezone-aware datetime with UTC
+"""
+from datetime import timezone
+
+UTC = timezone.utc  # Equivalent to datetime.UTC (Python 3.11+)

src/crewai/utilities/events/__init__.py

@@ -34,7 +34,6 @@ from .tool_usage_events import (
     ToolUsageEvent,
     ToolValidateInputErrorEvent,
 )
-from .llm_events import LLMCallCompletedEvent, LLMCallFailedEvent, LLMCallStartedEvent
 
 # events
 from .event_listener import EventListener

src/crewai/utilities/events/event_listener.py

@@ -1,17 +1,9 @@
-from typing import Any, Dict
+from pydantic import PrivateAttr
 
-from pydantic import Field, PrivateAttr
-
-from crewai.task import Task
 from crewai.telemetry.telemetry import Telemetry
 from crewai.utilities import Logger
 from crewai.utilities.constants import EMITTER_COLOR
 from crewai.utilities.events.base_event_listener import BaseEventListener
-from crewai.utilities.events.llm_events import (
-    LLMCallCompletedEvent,
-    LLMCallFailedEvent,
-    LLMCallStartedEvent,
-)
 
 from .agent_events import AgentExecutionCompletedEvent, AgentExecutionStartedEvent
 from .crew_events import (
@@ -45,7 +37,6 @@ class EventListener(BaseEventListener):
     _instance = None
     _telemetry: Telemetry = PrivateAttr(default_factory=lambda: Telemetry())
     logger = Logger(verbose=True, default_color=EMITTER_COLOR)
-    execution_spans: Dict[Task, Any] = Field(default_factory=dict)
 
     def __new__(cls):
         if cls._instance is None:
@@ -58,7 +49,6 @@ class EventListener(BaseEventListener):
             super().__init__()
             self._telemetry = Telemetry()
             self._telemetry.set_tracer()
-            self.execution_spans = {}
             self._initialized = True
 
     # ----------- CREW EVENTS -----------
@@ -67,7 +57,7 @@ class EventListener(BaseEventListener):
         @crewai_event_bus.on(CrewKickoffStartedEvent)
         def on_crew_started(source, event: CrewKickoffStartedEvent):
             self.logger.log(
-                f"🚀 Crew '{event.crew_name}' started, {source.id}",
+                f"🚀 Crew '{event.crew_name}' started",
                 event.timestamp,
             )
             self._telemetry.crew_execution_span(source, event.inputs)
@@ -77,28 +67,28 @@ class EventListener(BaseEventListener):
             final_string_output = event.output.raw
             self._telemetry.end_crew(source, final_string_output)
             self.logger.log(
-                f"✅ Crew '{event.crew_name}' completed, {source.id}",
+                f"✅ Crew '{event.crew_name}' completed",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(CrewKickoffFailedEvent)
         def on_crew_failed(source, event: CrewKickoffFailedEvent):
             self.logger.log(
-                f"❌ Crew '{event.crew_name}' failed, {source.id}",
+                f"❌ Crew '{event.crew_name}' failed",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(CrewTestStartedEvent)
         def on_crew_test_started(source, event: CrewTestStartedEvent):
             cloned_crew = source.copy()
-            self._telemetry.test_execution_span(
+            cloned_crew._telemetry.test_execution_span(
                 cloned_crew,
                 event.n_iterations,
                 event.inputs,
-                event.eval_llm or "",
+                event.eval_llm,
             )
             self.logger.log(
-                f"🚀 Crew '{event.crew_name}' started test, {source.id}",
+                f"🚀 Crew '{event.crew_name}' started test",
                 event.timestamp,
             )
 
@@ -141,9 +131,9 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(TaskStartedEvent)
         def on_task_started(source, event: TaskStartedEvent):
-            span = self._telemetry.task_started(crew=source.agent.crew, task=source)
-            self.execution_spans[source] = span
-
+            source._execution_span = self._telemetry.task_started(
+                crew=source.agent.crew, task=source
+            )
             self.logger.log(
                 f"📋 Task started: {source.description}",
                 event.timestamp,
@@ -151,22 +141,24 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(TaskCompletedEvent)
         def on_task_completed(source, event: TaskCompletedEvent):
-            span = self.execution_spans.get(source)
-            if span:
-                self._telemetry.task_ended(span, source, source.agent.crew)
+            if source._execution_span:
+                self._telemetry.task_ended(
+                    source._execution_span, source, source.agent.crew
+                )
             self.logger.log(
                 f"✅ Task completed: {source.description}",
                 event.timestamp,
             )
-            self.execution_spans[source] = None
+            source._execution_span = None
 
         @crewai_event_bus.on(TaskFailedEvent)
         def on_task_failed(source, event: TaskFailedEvent):
-            span = self.execution_spans.get(source)
-            if span:
+            if source._execution_span:
                 if source.agent and source.agent.crew:
-                    self._telemetry.task_ended(span, source, source.agent.crew)
-                self.execution_spans[source] = None
+                    self._telemetry.task_ended(
+                        source._execution_span, source, source.agent.crew
+                    )
+                source._execution_span = None
             self.logger.log(
                 f"❌ Task failed: {source.description}",
                 event.timestamp,
@@ -192,7 +184,7 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(FlowCreatedEvent)
         def on_flow_created(source, event: FlowCreatedEvent):
-            self._telemetry.flow_creation_span(event.flow_name)
+            self._telemetry.flow_creation_span(self.__class__.__name__)
             self.logger.log(
                 f"🌊 Flow Created: '{event.flow_name}'",
                 event.timestamp,
@@ -201,17 +193,17 @@ class EventListener(BaseEventListener):
         @crewai_event_bus.on(FlowStartedEvent)
         def on_flow_started(source, event: FlowStartedEvent):
             self._telemetry.flow_execution_span(
-                event.flow_name, list(source._methods.keys())
+                source.__class__.__name__, list(source._methods.keys())
             )
             self.logger.log(
-                f"🤖 Flow Started: '{event.flow_name}', {source.flow_id}",
+                f"🤖 Flow Started: '{event.flow_name}'",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(FlowFinishedEvent)
         def on_flow_finished(source, event: FlowFinishedEvent):
             self.logger.log(
-                f"👍 Flow Finished: '{event.flow_name}', {source.flow_id}",
+                f"👍 Flow Finished: '{event.flow_name}'",
                 event.timestamp,
             )
 
@@ -261,28 +253,5 @@ class EventListener(BaseEventListener):
                 #
             )
 
-        # ----------- LLM EVENTS -----------
-
-        @crewai_event_bus.on(LLMCallStartedEvent)
-        def on_llm_call_started(source, event: LLMCallStartedEvent):
-            self.logger.log(
-                f"🤖 LLM Call Started",
-                event.timestamp,
-            )
-
-        @crewai_event_bus.on(LLMCallCompletedEvent)
-        def on_llm_call_completed(source, event: LLMCallCompletedEvent):
-            self.logger.log(
-                f"✅ LLM Call Completed",
-                event.timestamp,
-            )
-
-        @crewai_event_bus.on(LLMCallFailedEvent)
-        def on_llm_call_failed(source, event: LLMCallFailedEvent):
-            self.logger.log(
-                f"❌ LLM Call Failed: '{event.error}'",
-                event.timestamp,
-            )
-
 
 event_listener = EventListener()

src/crewai/utilities/events/llm_events.py

@@ -1,36 +0,0 @@
-from enum import Enum
-from typing import Any, Dict, List, Optional, Union
-
-from crewai.utilities.events.base_events import CrewEvent
-
-
-class LLMCallType(Enum):
-    """Type of LLM call being made"""
-
-    TOOL_CALL = "tool_call"
-    LLM_CALL = "llm_call"
-
-
-class LLMCallStartedEvent(CrewEvent):
-    """Event emitted when a LLM call starts"""
-
-    type: str = "llm_call_started"
-    messages: Union[str, List[Dict[str, str]]]
-    tools: Optional[List[dict]] = None
-    callbacks: Optional[List[Any]] = None
-    available_functions: Optional[Dict[str, Any]] = None
-
-
-class LLMCallCompletedEvent(CrewEvent):
-    """Event emitted when a LLM call completes"""
-
-    type: str = "llm_call_completed"
-    response: Any
-    call_type: LLMCallType
-
-
-class LLMCallFailedEvent(CrewEvent):
-    """Event emitted when a LLM call fails"""
-
-    error: str
-    type: str = "llm_call_failed"

src/crewai/utilities/events/task_events.py

@@ -1,4 +1,4 @@
-from typing import Optional
+from typing import Any, Optional
 
 from crewai.tasks.task_output import TaskOutput
 from crewai.utilities.events.base_events import CrewEvent

tests/agent_test.py

@@ -1,6 +1,7 @@
 """Test Agent creation and execution basic functionality."""
 
 import os
+from datetime import datetime, timezone
 from unittest import mock
 from unittest.mock import patch
 
@@ -8,7 +9,7 @@ import pytest
 
 from crewai import Agent, Crew, Task
 from crewai.agents.cache import CacheHandler
-from crewai.agents.crew_agent_executor import AgentFinish, CrewAgentExecutor
+from crewai.agents.crew_agent_executor import CrewAgentExecutor
 from crewai.agents.parser import AgentAction, CrewAgentParser, OutputParserException
 from crewai.knowledge.source.base_knowledge_source import BaseKnowledgeSource
 from crewai.knowledge.source.string_knowledge_source import StringKnowledgeSource
@@ -17,6 +18,7 @@ from crewai.tools import tool
 from crewai.tools.tool_calling import InstructorToolCalling
 from crewai.tools.tool_usage import ToolUsage
 from crewai.utilities import RPMController
+from crewai.utilities.datetime_compat import UTC
 from crewai.utilities.events import crewai_event_bus
 from crewai.utilities.events.tool_usage_events import ToolUsageFinishedEvent
 
@@ -915,9 +917,10 @@ def test_tool_result_as_answer_is_the_final_answer_for_the_agent():
 
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_tool_usage_information_is_appended_to_agent():
-    from datetime import UTC, datetime
+    from datetime import datetime, timezone
 
     from crewai.tools import BaseTool
+    from crewai.utilities.datetime_compat import UTC
 
     class MyCustomTool(BaseTool):
         name: str = "Decide Greetings"
@@ -927,8 +930,9 @@ def test_tool_usage_information_is_appended_to_agent():
             return "Howdy!"
 
     fixed_datetime = datetime(2025, 2, 10, 12, 0, 0, tzinfo=UTC)
-    with patch("datetime.datetime") as mock_datetime:
+    with patch("crewai.tools.tool_usage.datetime", autospec=True) as mock_datetime:
         mock_datetime.now.return_value = fixed_datetime
+        mock_datetime.fromtimestamp = datetime.fromtimestamp
         mock_datetime.side_effect = lambda *args, **kw: datetime(*args, **kw)
 
         agent1 = Agent(
@@ -998,35 +1002,23 @@ def test_agent_human_input():
     # Side effect function for _ask_human_input to simulate multiple feedback iterations
     feedback_responses = iter(
         [
-            "Don't say hi, say Hello instead!",  # First feedback: instruct change
-            "",  # Second feedback: empty string signals acceptance
+            "Don't say hi, say Hello instead!",  # First feedback
+            "looks good",  # Second feedback to exit loop
         ]
     )
 
     def ask_human_input_side_effect(*args, **kwargs):
         return next(feedback_responses)
 
-    # Patch both _ask_human_input and _invoke_loop to avoid real API/network calls.
-    with (
-        patch.object(
-            CrewAgentExecutor,
-            "_ask_human_input",
-            side_effect=ask_human_input_side_effect,
-        ) as mock_human_input,
-        patch.object(
-            CrewAgentExecutor,
-            "_invoke_loop",
-            return_value=AgentFinish(output="Hello", thought="", text=""),
-        ) as mock_invoke_loop,
-    ):
+    with patch.object(
+        CrewAgentExecutor, "_ask_human_input", side_effect=ask_human_input_side_effect
+    ) as mock_human_input:
         # Execute the task
         output = agent.execute_task(task)
 
-        # Assertions to ensure the agent behaves correctly.
-        # It should have requested feedback twice.
-        assert mock_human_input.call_count == 2
-        # The final result should be processed to "Hello"
-        assert output.strip().lower() == "hello"
+        # Assertions to ensure the agent behaves correctly
+        assert mock_human_input.call_count == 2  # Should have asked for feedback twice
+        assert output.strip().lower() == "hello"  # Final output should be 'Hello'
 
 
 def test_interpolate_inputs():

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tests/crew_test.py

@@ -833,12 +833,6 @@ def test_crew_verbose_output(capsys):
 
     crew.kickoff()
     captured = capsys.readouterr()
-
-    # Filter out event listener logs (lines starting with '[')
-    filtered_output = "\n".join(
-        line for line in captured.out.split("\n") if not line.startswith("[")
-    )
-
     expected_strings = [
         "\x1b[1m\x1b[95m# Agent:\x1b[00m \x1b[1m\x1b[92mResearcher",
         "\x1b[00m\n\x1b[95m## Task:\x1b[00m \x1b[92mResearch AI advancements.",
@@ -851,19 +845,27 @@ def test_crew_verbose_output(capsys):
     ]
 
     for expected_string in expected_strings:
-        assert expected_string in filtered_output
+        assert expected_string in captured.out
 
     # Now test with verbose set to False
     crew.verbose = False
     crew._logger = Logger(verbose=False)
     crew.kickoff()
+    expected_listener_logs = [
+        "[🚀 CREW 'CREW' STARTED]",
+        "[📋 TASK STARTED: RESEARCH AI ADVANCEMENTS.]",
+        "[🤖 AGENT 'RESEARCHER' STARTED TASK]",
+        "[✅ AGENT 'RESEARCHER' COMPLETED TASK]",
+        "[✅ TASK COMPLETED: RESEARCH AI ADVANCEMENTS.]",
+        "[📋 TASK STARTED: WRITE ABOUT AI IN HEALTHCARE.]",
+        "[🤖 AGENT 'SENIOR WRITER' STARTED TASK]",
+        "[✅ AGENT 'SENIOR WRITER' COMPLETED TASK]",
+        "[✅ TASK COMPLETED: WRITE ABOUT AI IN HEALTHCARE.]",
+        "[✅ CREW 'CREW' COMPLETED]",
+    ]
     captured = capsys.readouterr()
-    filtered_output = "\n".join(
-        line
-        for line in captured.out.split("\n")
-        if not line.startswith("[") and line.strip() and not line.startswith("\x1b")
-    )
-    assert filtered_output == ""
+    for log in expected_listener_logs:
+        assert log in captured.out
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])

tests/traces/test_unified_trace_controller.py

@@ -1,5 +1,5 @@
 import os
-from datetime import UTC, datetime
+from datetime import datetime
 from unittest.mock import MagicMock, patch
 from uuid import UUID
 
@@ -21,6 +21,7 @@ from crewai.traces.unified_trace_controller import (
     trace_flow_step,
     trace_llm_call,
 )
+from crewai.utilities.datetime_compat import UTC
 
 
 class TestUnifiedTraceController:

tests/utilities/cassettes/test_converter_with_llama3_2_model.yaml

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-      - litellm/1.60.2
+      - litellm/1.57.4
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+      - '1263'
       Content-Type:
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       Date:
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+      - Wed, 15 Jan 2025 20:47:12 GMT
     http_version: HTTP/1.1
     status_code: 200
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@@ -47,7 +52,7 @@ interactions:
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       user-agent:
-      - litellm/1.60.2
+      - litellm/1.57.4
     method: POST
     uri: http://localhost:11434/api/show
   response:
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tests/utilities/cassettes/test_llm_emits_call_started_event.yaml

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tests/utilities/test_converter.py

@@ -1,5 +1,4 @@
 import json
-import os
 from typing import Dict, List, Optional
 from unittest.mock import MagicMock, Mock, patch
 
@@ -221,13 +220,10 @@ def test_get_conversion_instructions_gpt():
         supports_function_calling.return_value = True
         instructions = get_conversion_instructions(SimpleModel, llm)
         model_schema = PydanticSchemaParser(model=SimpleModel).get_schema()
-        expected_instructions = (
-            "Please convert the following text into valid JSON.\n\n"
-            "Output ONLY the valid JSON and nothing else.\n\n"
-            "The JSON must follow this schema exactly:\n```json\n"
-            f"{model_schema}\n```"
+        assert (
+            instructions
+            == f"Please convert the following text into valid JSON.\n\nThe JSON should follow this schema:\n```json\n{model_schema}\n```"
         )
-        assert instructions == expected_instructions
 
 
 def test_get_conversion_instructions_non_gpt():
@@ -350,17 +346,12 @@ def test_convert_with_instructions():
     assert output.age == 30
 
 
-# Skip tests that call external APIs when running in CI/CD
-skip_external_api = pytest.mark.skipif(
-    os.getenv("CI") is not None, reason="Skipping tests that call external API in CI/CD"
-)
-
-
-@skip_external_api
-@pytest.mark.vcr(filter_headers=["authorization"], record_mode="once")
+@pytest.mark.vcr(filter_headers=["authorization"])
 def test_converter_with_llama3_2_model():
     llm = LLM(model="ollama/llama3.2:3b", base_url="http://localhost:11434")
+
     sample_text = "Name: Alice Llama, Age: 30"
+
     instructions = get_conversion_instructions(SimpleModel, llm)
     converter = Converter(
         llm=llm,
@@ -368,17 +359,19 @@ def test_converter_with_llama3_2_model():
         model=SimpleModel,
         instructions=instructions,
     )
+
     output = converter.to_pydantic()
+
     assert isinstance(output, SimpleModel)
     assert output.name == "Alice Llama"
     assert output.age == 30
 
 
-@skip_external_api
-@pytest.mark.vcr(filter_headers=["authorization"], record_mode="once")
+@pytest.mark.vcr(filter_headers=["authorization"])
 def test_converter_with_llama3_1_model():
     llm = LLM(model="ollama/llama3.1", base_url="http://localhost:11434")
     sample_text = "Name: Alice Llama, Age: 30"
+
     instructions = get_conversion_instructions(SimpleModel, llm)
     converter = Converter(
         llm=llm,
@@ -386,19 +379,14 @@ def test_converter_with_llama3_1_model():
         model=SimpleModel,
         instructions=instructions,
     )
+
     output = converter.to_pydantic()
+
     assert isinstance(output, SimpleModel)
     assert output.name == "Alice Llama"
     assert output.age == 30
 
 
-# Skip tests that call external APIs when running in CI/CD
-skip_external_api = pytest.mark.skipif(
-    os.getenv("CI") is not None, reason="Skipping tests that call external API in CI/CD"
-)
-
-
-@skip_external_api
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_converter_with_nested_model():
     llm = LLM(model="gpt-4o-mini")
@@ -575,7 +563,7 @@ def test_converter_with_ambiguous_input():
     with pytest.raises(ConverterError) as exc_info:
         output = converter.to_pydantic()
 
-    assert "failed to convert text into a pydantic model" in str(exc_info.value).lower()
+    assert "validation error" in str(exc_info.value).lower()
 
 
 # Tests for function calling support

tests/utilities/test_datetime_compat.py

@@ -0,0 +1,35 @@
+"""Test datetime compatibility module."""
+from datetime import datetime, timedelta, timezone
+
+from crewai.utilities.datetime_compat import UTC
+
+
+def test_utc_timezone_compatibility():
+    """Test that UTC timezone is compatible with both Python 3.10 and 3.11+"""
+    assert UTC == timezone.utc
+    assert UTC.tzname(None) == "UTC"
+    # Verify it works with datetime.now()
+    dt = datetime.now(UTC)
+    assert dt.tzinfo == timezone.utc
+
+
+def test_utc_timezone_edge_cases():
+    """Test UTC timezone handling in edge cases."""
+    # Test with leap year
+    leap_date = datetime(2024, 2, 29, tzinfo=UTC)
+    assert leap_date.tzinfo == timezone.utc
+    
+    # Test DST transition dates
+    dst_date = datetime(2024, 3, 10, 2, 0, tzinfo=UTC)  # US DST start
+    assert dst_date.tzinfo == timezone.utc
+    
+    # Test with minimum/maximum dates
+    min_date = datetime.min.replace(tzinfo=UTC)
+    max_date = datetime.max.replace(tzinfo=UTC)
+    assert min_date.tzinfo == timezone.utc
+    assert max_date.tzinfo == timezone.utc
+    
+    # Test timezone offset calculations
+    dt = datetime(2024, 1, 1, tzinfo=UTC)
+    offset = dt.utcoffset()
+    assert offset == timedelta(0)  # UTC should always have zero offset

tests/utilities/test_events.py

@@ -1,5 +1,6 @@
+import json
 from datetime import datetime
-from unittest.mock import Mock, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 from pydantic import Field
@@ -8,9 +9,9 @@ from crewai.agent import Agent
 from crewai.agents.crew_agent_executor import CrewAgentExecutor
 from crewai.crew import Crew
 from crewai.flow.flow import Flow, listen, start
-from crewai.llm import LLM
 from crewai.task import Task
 from crewai.tools.base_tool import BaseTool
+from crewai.tools.tool_usage import ToolUsage
 from crewai.utilities.events.agent_events import (
     AgentExecutionCompletedEvent,
     AgentExecutionErrorEvent,
@@ -20,11 +21,8 @@ from crewai.utilities.events.crew_events import (
     CrewKickoffCompletedEvent,
     CrewKickoffFailedEvent,
     CrewKickoffStartedEvent,
-    CrewTestCompletedEvent,
-    CrewTestStartedEvent,
 )
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
-from crewai.utilities.events.event_listener import EventListener
 from crewai.utilities.events.event_types import ToolUsageFinishedEvent
 from crewai.utilities.events.flow_events import (
     FlowCreatedEvent,
@@ -33,12 +31,6 @@ from crewai.utilities.events.flow_events import (
     MethodExecutionFailedEvent,
     MethodExecutionStartedEvent,
 )
-from crewai.utilities.events.llm_events import (
-    LLMCallCompletedEvent,
-    LLMCallFailedEvent,
-    LLMCallStartedEvent,
-    LLMCallType,
-)
 from crewai.utilities.events.task_events import (
     TaskCompletedEvent,
     TaskFailedEvent,
@@ -60,35 +52,26 @@ base_task = Task(
     expected_output="hi",
     agent=base_agent,
 )
-event_listener = EventListener()
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_crew_emits_start_kickoff_event():
     received_events = []
-    mock_span = Mock()
 
-    @crewai_event_bus.on(CrewKickoffStartedEvent)
-    def handle_crew_start(source, event):
-        received_events.append(event)
+    with crewai_event_bus.scoped_handlers():
+
+        @crewai_event_bus.on(CrewKickoffStartedEvent)
+        def handle_crew_start(source, event):
+            received_events.append(event)
+
+        crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
 
-    crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
-    with (
-        patch.object(
-            event_listener._telemetry, "crew_execution_span", return_value=mock_span
-        ) as mock_crew_execution_span,
-        patch.object(
-            event_listener._telemetry, "end_crew", return_value=mock_span
-        ) as mock_crew_ended,
-    ):
         crew.kickoff()
-    mock_crew_execution_span.assert_called_once_with(crew, None)
-    mock_crew_ended.assert_called_once_with(crew, "hi")
 
-    assert len(received_events) == 1
-    assert received_events[0].crew_name == "TestCrew"
-    assert isinstance(received_events[0].timestamp, datetime)
-    assert received_events[0].type == "crew_kickoff_started"
+        assert len(received_events) == 1
+        assert received_events[0].crew_name == "TestCrew"
+        assert isinstance(received_events[0].timestamp, datetime)
+        assert received_events[0].type == "crew_kickoff_started"
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])
@@ -109,45 +92,6 @@ def test_crew_emits_end_kickoff_event():
     assert received_events[0].type == "crew_kickoff_completed"
 
 
-@pytest.mark.vcr(filter_headers=["authorization"])
-def test_crew_emits_test_kickoff_type_event():
-    received_events = []
-    mock_span = Mock()
-
-    @crewai_event_bus.on(CrewTestStartedEvent)
-    def handle_crew_end(source, event):
-        received_events.append(event)
-
-    @crewai_event_bus.on(CrewTestCompletedEvent)
-    def handle_crew_test_end(source, event):
-        received_events.append(event)
-
-    eval_llm = LLM(model="gpt-4o-mini")
-    with (
-        patch.object(
-            event_listener._telemetry, "test_execution_span", return_value=mock_span
-        ) as mock_crew_execution_span,
-    ):
-        crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
-        crew.test(n_iterations=1, eval_llm=eval_llm)
-
-        # Verify the call was made with correct argument types and values
-        assert mock_crew_execution_span.call_count == 1
-        args = mock_crew_execution_span.call_args[0]
-        assert isinstance(args[0], Crew)
-        assert args[1] == 1
-        assert args[2] is None
-        assert args[3] == eval_llm
-
-    assert len(received_events) == 2
-    assert received_events[0].crew_name == "TestCrew"
-    assert isinstance(received_events[0].timestamp, datetime)
-    assert received_events[0].type == "crew_test_started"
-    assert received_events[1].crew_name == "TestCrew"
-    assert isinstance(received_events[1].timestamp, datetime)
-    assert received_events[1].type == "crew_test_completed"
-
-
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_crew_emits_kickoff_failed_event():
     received_events = []
@@ -198,20 +142,9 @@ def test_crew_emits_end_task_event():
     def handle_task_end(source, event):
         received_events.append(event)
 
-    mock_span = Mock()
     crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
-    with (
-        patch.object(
-            event_listener._telemetry, "task_started", return_value=mock_span
-        ) as mock_task_started,
-        patch.object(
-            event_listener._telemetry, "task_ended", return_value=mock_span
-        ) as mock_task_ended,
-    ):
-        crew.kickoff()
 
-    mock_task_started.assert_called_once_with(crew=crew, task=base_task)
-    mock_task_ended.assert_called_once_with(mock_span, base_task, crew)
+    crew.kickoff()
 
     assert len(received_events) == 1
     assert isinstance(received_events[0].timestamp, datetime)
@@ -401,29 +334,24 @@ def test_tools_emits_error_events():
 
 def test_flow_emits_start_event():
     received_events = []
-    mock_span = Mock()
 
-    @crewai_event_bus.on(FlowStartedEvent)
-    def handle_flow_start(source, event):
-        received_events.append(event)
+    with crewai_event_bus.scoped_handlers():
 
-    class TestFlow(Flow[dict]):
-        @start()
-        def begin(self):
-            return "started"
+        @crewai_event_bus.on(FlowStartedEvent)
+        def handle_flow_start(source, event):
+            received_events.append(event)
+
+        class TestFlow(Flow[dict]):
+            @start()
+            def begin(self):
+                return "started"
 
-    with (
-        patch.object(
-            event_listener._telemetry, "flow_execution_span", return_value=mock_span
-        ) as mock_flow_execution_span,
-    ):
         flow = TestFlow()
         flow.kickoff()
 
-    mock_flow_execution_span.assert_called_once_with("TestFlow", ["begin"])
-    assert len(received_events) == 1
-    assert received_events[0].flow_name == "TestFlow"
-    assert received_events[0].type == "flow_started"
+        assert len(received_events) == 1
+        assert received_events[0].flow_name == "TestFlow"
+        assert received_events[0].type == "flow_started"
 
 
 def test_flow_emits_finish_event():
@@ -527,7 +455,6 @@ def test_multiple_handlers_for_same_event():
 
 def test_flow_emits_created_event():
     received_events = []
-    mock_span = Mock()
 
     @crewai_event_bus.on(FlowCreatedEvent)
     def handle_flow_created(source, event):
@@ -538,15 +465,8 @@ def test_flow_emits_created_event():
         def begin(self):
             return "started"
 
-    with (
-        patch.object(
-            event_listener._telemetry, "flow_creation_span", return_value=mock_span
-        ) as mock_flow_creation_span,
-    ):
-        flow = TestFlow()
-        flow.kickoff()
-
-    mock_flow_creation_span.assert_called_once_with("TestFlow")
+    flow = TestFlow()
+    flow.kickoff()
 
     assert len(received_events) == 1
     assert received_events[0].flow_name == "TestFlow"
@@ -575,43 +495,3 @@ def test_flow_emits_method_execution_failed_event():
     assert received_events[0].flow_name == "TestFlow"
     assert received_events[0].type == "method_execution_failed"
     assert received_events[0].error == error
-
-
-@pytest.mark.vcr(filter_headers=["authorization"])
-def test_llm_emits_call_started_event():
-    received_events = []
-
-    @crewai_event_bus.on(LLMCallStartedEvent)
-    def handle_llm_call_started(source, event):
-        received_events.append(event)
-
-    @crewai_event_bus.on(LLMCallCompletedEvent)
-    def handle_llm_call_completed(source, event):
-        received_events.append(event)
-
-    llm = LLM(model="gpt-4o-mini")
-    llm.call("Hello, how are you?")
-
-    assert len(received_events) == 2
-    assert received_events[0].type == "llm_call_started"
-    assert received_events[1].type == "llm_call_completed"
-
-
-@pytest.mark.vcr(filter_headers=["authorization"])
-def test_llm_emits_call_failed_event():
-    received_events = []
-
-    @crewai_event_bus.on(LLMCallFailedEvent)
-    def handle_llm_call_failed(source, event):
-        received_events.append(event)
-
-    error_message = "Simulated LLM call failure"
-    with patch.object(LLM, "_call_llm", side_effect=Exception(error_message)):
-        llm = LLM(model="gpt-4o-mini")
-        with pytest.raises(Exception) as exc_info:
-            llm.call("Hello, how are you?")
-
-        assert str(exc_info.value) == error_message
-        assert len(received_events) == 1
-        assert received_events[0].type == "llm_call_failed"
-        assert received_events[0].error == error_message