chore: Drop Python 3.9 support, set minimum to Python 3.10

Co-authored-by: George Weale <gweale@google.com>
PiperOrigin-RevId: 839799108

tests/unittests/a2a/converters/test_event_converter.py

@@ -12,50 +12,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.types import DataPart
+from a2a.types import Message
+from a2a.types import Role
+from a2a.types import Task
+from a2a.types import TaskState
+from a2a.types import TaskStatusUpdateEvent
+from google.adk.a2a.converters.event_converter import _create_artifact_id
+from google.adk.a2a.converters.event_converter import _create_error_status_event
+from google.adk.a2a.converters.event_converter import _create_status_update_event
+from google.adk.a2a.converters.event_converter import _get_adk_metadata_key
+from google.adk.a2a.converters.event_converter import _get_context_metadata
+from google.adk.a2a.converters.event_converter import _process_long_running_tool
+from google.adk.a2a.converters.event_converter import _serialize_metadata_value
+from google.adk.a2a.converters.event_converter import ARTIFACT_ID_SEPARATOR
+from google.adk.a2a.converters.event_converter import convert_a2a_task_to_event
+from google.adk.a2a.converters.event_converter import convert_event_to_a2a_events
+from google.adk.a2a.converters.event_converter import convert_event_to_a2a_message
+from google.adk.a2a.converters.event_converter import DEFAULT_ERROR_MESSAGE
+from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
+from google.adk.agents.invocation_context import InvocationContext
+from google.adk.events.event import Event
+from google.adk.events.event_actions import EventActions
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.types import DataPart
-  from a2a.types import Message
-  from a2a.types import Role
-  from a2a.types import Task
-  from a2a.types import TaskState
-  from a2a.types import TaskStatusUpdateEvent
-  from google.adk.a2a.converters.event_converter import _create_artifact_id
-  from google.adk.a2a.converters.event_converter import _create_error_status_event
-  from google.adk.a2a.converters.event_converter import _create_status_update_event
-  from google.adk.a2a.converters.event_converter import _get_adk_metadata_key
-  from google.adk.a2a.converters.event_converter import _get_context_metadata
-  from google.adk.a2a.converters.event_converter import _process_long_running_tool
-  from google.adk.a2a.converters.event_converter import _serialize_metadata_value
-  from google.adk.a2a.converters.event_converter import ARTIFACT_ID_SEPARATOR
-  from google.adk.a2a.converters.event_converter import convert_a2a_task_to_event
-  from google.adk.a2a.converters.event_converter import convert_event_to_a2a_events
-  from google.adk.a2a.converters.event_converter import convert_event_to_a2a_message
-  from google.adk.a2a.converters.event_converter import DEFAULT_ERROR_MESSAGE
-  from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
-  from google.adk.agents.invocation_context import InvocationContext
-  from google.adk.events.event import Event
-  from google.adk.events.event_actions import EventActions
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestEventConverter:
   """Test suite for event_converter module."""

tests/unittests/a2a/converters/test_part_converter.py

@@ -13,38 +13,21 @@
 # limitations under the License.
 
 import json
-import sys
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a import types as a2a_types
+from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_CODE_EXECUTION_RESULT
+from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_EXECUTABLE_CODE
+from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_FUNCTION_CALL
+from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_FUNCTION_RESPONSE
+from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_KEY
+from google.adk.a2a.converters.part_converter import convert_a2a_part_to_genai_part
+from google.adk.a2a.converters.part_converter import convert_genai_part_to_a2a_part
+from google.adk.a2a.converters.utils import _get_adk_metadata_key
+from google.genai import types as genai_types
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a import types as a2a_types
-  from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_CODE_EXECUTION_RESULT
-  from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_EXECUTABLE_CODE
-  from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_FUNCTION_CALL
-  from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_FUNCTION_RESPONSE
-  from google.adk.a2a.converters.part_converter import A2A_DATA_PART_METADATA_TYPE_KEY
-  from google.adk.a2a.converters.part_converter import convert_a2a_part_to_genai_part
-  from google.adk.a2a.converters.part_converter import convert_genai_part_to_a2a_part
-  from google.adk.a2a.converters.utils import _get_adk_metadata_key
-  from google.genai import types as genai_types
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestConvertA2aPartToGenaiPart:
   """Test cases for convert_a2a_part_to_genai_part function."""

tests/unittests/a2a/converters/test_request_converter.py

@@ -12,33 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.server.agent_execution import RequestContext
+from google.adk.a2a.converters.request_converter import _get_user_id
+from google.adk.a2a.converters.request_converter import convert_a2a_request_to_agent_run_request
+from google.adk.runners import RunConfig
+from google.genai import types as genai_types
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.server.agent_execution import RequestContext
-  from google.adk.a2a.converters.request_converter import _get_user_id
-  from google.adk.a2a.converters.request_converter import convert_a2a_request_to_agent_run_request
-  from google.adk.runners import RunConfig
-  from google.genai import types as genai_types
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestGetUserId:
   """Test cases for _get_user_id function."""

tests/unittests/a2a/converters/test_utils.py

@@ -12,31 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
-
+from google.adk.a2a.converters.utils import _from_a2a_context_id
+from google.adk.a2a.converters.utils import _get_adk_metadata_key
+from google.adk.a2a.converters.utils import _to_a2a_context_id
+from google.adk.a2a.converters.utils import ADK_CONTEXT_ID_PREFIX
+from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.a2a.converters.utils import _from_a2a_context_id
-  from google.adk.a2a.converters.utils import _get_adk_metadata_key
-  from google.adk.a2a.converters.utils import _to_a2a_context_id
-  from google.adk.a2a.converters.utils import ADK_CONTEXT_ID_PREFIX
-  from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestUtilsFunctions:
   """Test suite for utils module functions."""

tests/unittests/a2a/executor/test_a2a_agent_executor.py

@@ -12,41 +12,24 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import AsyncMock
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.server.agent_execution.context import RequestContext
+from a2a.server.events.event_queue import EventQueue
+from a2a.types import Message
+from a2a.types import TaskState
+from a2a.types import TextPart
+from google.adk.a2a.converters.request_converter import AgentRunRequest
+from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutor
+from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutorConfig
+from google.adk.events.event import Event
+from google.adk.runners import RunConfig
+from google.adk.runners import Runner
+from google.genai.types import Content
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.server.agent_execution.context import RequestContext
-  from a2a.server.events.event_queue import EventQueue
-  from a2a.types import Message
-  from a2a.types import TaskState
-  from a2a.types import TextPart
-  from google.adk.a2a.converters.request_converter import AgentRunRequest
-  from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutor
-  from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutorConfig
-  from google.adk.events.event import Event
-  from google.adk.runners import RunConfig
-  from google.adk.runners import Runner
-  from google.genai.types import Content
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestA2aAgentExecutor:
   """Test suite for A2aAgentExecutor class."""

tests/unittests/a2a/executor/test_task_result_aggregator.py

@@ -12,35 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import Mock
 
+from a2a.types import Message
+from a2a.types import Part
+from a2a.types import Role
+from a2a.types import TaskState
+from a2a.types import TaskStatus
+from a2a.types import TaskStatusUpdateEvent
+from a2a.types import TextPart
+from google.adk.a2a.executor.task_result_aggregator import TaskResultAggregator
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.types import Message
-  from a2a.types import Part
-  from a2a.types import Role
-  from a2a.types import TaskState
-  from a2a.types import TaskStatus
-  from a2a.types import TaskStatusUpdateEvent
-  from a2a.types import TextPart
-  from google.adk.a2a.executor.task_result_aggregator import TaskResultAggregator
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 def create_test_message(text: str):
   """Helper function to create a test Message object."""

tests/unittests/a2a/utils/test_agent_card_builder.py

@@ -12,55 +12,38 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.types import AgentCapabilities
+from a2a.types import AgentCard
+from a2a.types import AgentProvider
+from a2a.types import AgentSkill
+from a2a.types import SecurityScheme
+from google.adk.a2a.utils.agent_card_builder import _build_agent_description
+from google.adk.a2a.utils.agent_card_builder import _build_llm_agent_description_with_instructions
+from google.adk.a2a.utils.agent_card_builder import _build_loop_description
+from google.adk.a2a.utils.agent_card_builder import _build_orchestration_skill
+from google.adk.a2a.utils.agent_card_builder import _build_parallel_description
+from google.adk.a2a.utils.agent_card_builder import _build_sequential_description
+from google.adk.a2a.utils.agent_card_builder import _convert_example_tool_examples
+from google.adk.a2a.utils.agent_card_builder import _extract_examples_from_instruction
+from google.adk.a2a.utils.agent_card_builder import _get_agent_skill_name
+from google.adk.a2a.utils.agent_card_builder import _get_agent_type
+from google.adk.a2a.utils.agent_card_builder import _get_default_description
+from google.adk.a2a.utils.agent_card_builder import _get_input_modes
+from google.adk.a2a.utils.agent_card_builder import _get_output_modes
+from google.adk.a2a.utils.agent_card_builder import _get_workflow_description
+from google.adk.a2a.utils.agent_card_builder import _replace_pronouns
+from google.adk.a2a.utils.agent_card_builder import AgentCardBuilder
+from google.adk.agents.base_agent import BaseAgent
+from google.adk.agents.llm_agent import LlmAgent
+from google.adk.agents.loop_agent import LoopAgent
+from google.adk.agents.parallel_agent import ParallelAgent
+from google.adk.agents.sequential_agent import SequentialAgent
+from google.adk.tools.example_tool import ExampleTool
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.types import AgentCapabilities
-  from a2a.types import AgentCard
-  from a2a.types import AgentProvider
-  from a2a.types import AgentSkill
-  from a2a.types import SecurityScheme
-  from google.adk.a2a.utils.agent_card_builder import _build_agent_description
-  from google.adk.a2a.utils.agent_card_builder import _build_llm_agent_description_with_instructions
-  from google.adk.a2a.utils.agent_card_builder import _build_loop_description
-  from google.adk.a2a.utils.agent_card_builder import _build_orchestration_skill
-  from google.adk.a2a.utils.agent_card_builder import _build_parallel_description
-  from google.adk.a2a.utils.agent_card_builder import _build_sequential_description
-  from google.adk.a2a.utils.agent_card_builder import _convert_example_tool_examples
-  from google.adk.a2a.utils.agent_card_builder import _extract_examples_from_instruction
-  from google.adk.a2a.utils.agent_card_builder import _get_agent_skill_name
-  from google.adk.a2a.utils.agent_card_builder import _get_agent_type
-  from google.adk.a2a.utils.agent_card_builder import _get_default_description
-  from google.adk.a2a.utils.agent_card_builder import _get_input_modes
-  from google.adk.a2a.utils.agent_card_builder import _get_output_modes
-  from google.adk.a2a.utils.agent_card_builder import _get_workflow_description
-  from google.adk.a2a.utils.agent_card_builder import _replace_pronouns
-  from google.adk.a2a.utils.agent_card_builder import AgentCardBuilder
-  from google.adk.agents.base_agent import BaseAgent
-  from google.adk.agents.llm_agent import LlmAgent
-  from google.adk.agents.loop_agent import LoopAgent
-  from google.adk.agents.parallel_agent import ParallelAgent
-  from google.adk.agents.sequential_agent import SequentialAgent
-  from google.adk.tools.example_tool import ExampleTool
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
-
 
 class TestAgentCardBuilder:
   """Test suite for AgentCardBuilder class."""

tests/unittests/a2a/utils/test_agent_to_a2a.py

@@ -12,42 +12,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import AsyncMock
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.server.apps import A2AStarletteApplication
+from a2a.server.request_handlers import DefaultRequestHandler
+from a2a.server.tasks import InMemoryTaskStore
+from a2a.types import AgentCard
+from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutor
+from google.adk.a2a.utils.agent_card_builder import AgentCardBuilder
+from google.adk.a2a.utils.agent_to_a2a import to_a2a
+from google.adk.agents.base_agent import BaseAgent
+from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService
+from google.adk.auth.credential_service.in_memory_credential_service import InMemoryCredentialService
+from google.adk.memory.in_memory_memory_service import InMemoryMemoryService
+from google.adk.runners import Runner
+from google.adk.sessions.in_memory_session_service import InMemorySessionService
 import pytest
-
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.server.apps import A2AStarletteApplication
-  from a2a.server.request_handlers import DefaultRequestHandler
-  from a2a.server.tasks import InMemoryTaskStore
-  from a2a.types import AgentCard
-  from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutor
-  from google.adk.a2a.utils.agent_card_builder import AgentCardBuilder
-  from google.adk.a2a.utils.agent_to_a2a import to_a2a
-  from google.adk.agents.base_agent import BaseAgent
-  from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService
-  from google.adk.auth.credential_service.in_memory_credential_service import InMemoryCredentialService
-  from google.adk.memory.in_memory_memory_service import InMemoryMemoryService
-  from google.adk.runners import Runner
-  from google.adk.sessions.in_memory_session_service import InMemorySessionService
-  from starlette.applications import Starlette
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Imports are not needed since tests will be skipped due to pytestmark.
-    # The imported names are only used within test methods, not at module level,
-    # so no NameError occurs during module compilation.
-    pass
-  else:
-    raise e
+from starlette.applications import Starlette
 
 
 class TestToA2A:

tests/unittests/agents/test_mcp_instruction_provider.py

@@ -13,34 +13,14 @@
 # limitations under the License.
 
 """Unit tests for McpInstructionProvider."""
-import sys
 from unittest.mock import AsyncMock
 from unittest.mock import MagicMock
 from unittest.mock import patch
 
+from google.adk.agents.mcp_instruction_provider import McpInstructionProvider
 from google.adk.agents.readonly_context import ReadonlyContext
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10),
-    reason="MCP instruction provider requires Python 3.10+",
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.agents.mcp_instruction_provider import McpInstructionProvider
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyClass:
-      pass
-
-    McpInstructionProvider = DummyClass
-  else:
-    raise e
-
 
 class TestMcpInstructionProvider:
   """Unit tests for McpInstructionProvider."""

tests/unittests/agents/test_remote_a2a_agent.py

@@ -14,70 +14,38 @@
 
 import json
 from pathlib import Path
-import sys
 import tempfile
 from unittest.mock import AsyncMock
 from unittest.mock import create_autospec
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from a2a.client.client import ClientConfig
+from a2a.client.client import Consumer
+from a2a.client.client_factory import ClientFactory
+from a2a.types import AgentCapabilities
+from a2a.types import AgentCard
+from a2a.types import AgentSkill
+from a2a.types import Artifact
+from a2a.types import Message as A2AMessage
+from a2a.types import Part as A2ATaskStatus
+from a2a.types import SendMessageSuccessResponse
+from a2a.types import Task as A2ATask
+from a2a.types import TaskArtifactUpdateEvent
+from a2a.types import TaskState
+from a2a.types import TaskStatus
+from a2a.types import TaskStatusUpdateEvent
+from a2a.types import TextPart
+from google.adk.agents.invocation_context import InvocationContext
+from google.adk.agents.remote_a2a_agent import A2A_METADATA_PREFIX
+from google.adk.agents.remote_a2a_agent import AgentCardResolutionError
+from google.adk.agents.remote_a2a_agent import RemoteA2aAgent
 from google.adk.events.event import Event
 from google.adk.sessions.session import Session
 from google.genai import types as genai_types
 import httpx
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from a2a.client.client import ClientConfig
-  from a2a.client.client import Consumer
-  from a2a.client.client_factory import ClientFactory
-  from a2a.types import AgentCapabilities
-  from a2a.types import AgentCard
-  from a2a.types import AgentSkill
-  from a2a.types import Artifact
-  from a2a.types import Message as A2AMessage
-  from a2a.types import Part as A2ATaskStatus
-  from a2a.types import SendMessageSuccessResponse
-  from a2a.types import Task as A2ATask
-  from a2a.types import TaskArtifactUpdateEvent
-  from a2a.types import TaskState
-  from a2a.types import TaskStatus
-  from a2a.types import TaskStatusUpdateEvent
-  from a2a.types import TextPart
-  from google.adk.agents.invocation_context import InvocationContext
-  from google.adk.agents.remote_a2a_agent import A2A_METADATA_PREFIX
-  from google.adk.agents.remote_a2a_agent import AgentCardResolutionError
-  from google.adk.agents.remote_a2a_agent import RemoteA2aAgent
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during module compilation.
-    # These are needed because the module has type annotations and module-level
-    # helper functions that reference imported types.
-    class DummyTypes:
-      pass
-
-    AgentCapabilities = DummyTypes()
-    AgentCard = DummyTypes()
-    AgentSkill = DummyTypes()
-    A2AMessage = DummyTypes()
-    SendMessageSuccessResponse = DummyTypes()
-    A2ATask = DummyTypes()
-    TaskStatusUpdateEvent = DummyTypes()
-    Artifact = DummyTypes()
-    TaskArtifactUpdateEvent = DummyTypes()
-    InvocationContext = DummyTypes()
-    RemoteA2aAgent = DummyTypes()
-    AgentCardResolutionError = Exception
-    A2A_METADATA_PREFIX = ""
-  else:
-    raise e
-
 
 # Helper function to create a proper AgentCard for testing
 def create_test_agent_card(

tests/unittests/cli/test_fast_api.py

@@ -509,8 +509,6 @@ async def create_test_eval_set(
 @pytest.fixture
 def temp_agents_dir_with_a2a():
   """Create a temporary agents directory with A2A agent configurations for testing."""
-  if sys.version_info < (3, 10):
-    pytest.skip("A2A requires Python 3.10+")
   with tempfile.TemporaryDirectory() as temp_dir:
     # Create test agent directory
     agent_dir = Path(temp_dir) / "test_a2a_agent"
@@ -554,9 +552,6 @@ def test_app_with_a2a(
     temp_agents_dir_with_a2a,
 ):
   """Create a TestClient for the FastAPI app with A2A enabled."""
-  if sys.version_info < (3, 10):
-    pytest.skip("A2A requires Python 3.10+")
-
   # Mock A2A related classes
   with (
       patch("signal.signal", return_value=None),
@@ -1150,9 +1145,6 @@ def test_get_event_graph_returns_dot_src_for_app_agent():
   assert "dotSrc" in response.json()
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
 def test_a2a_agent_discovery(test_app_with_a2a):
   """Test that A2A agents are properly discovered and configured."""
   # This test mainly verifies that the A2A setup doesn't break the app
@@ -1161,9 +1153,6 @@ def test_a2a_agent_discovery(test_app_with_a2a):
   logger.info("A2A agent discovery test passed")
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
-)
 def test_a2a_disabled_by_default(test_app):
   """Test that A2A functionality is disabled by default."""
   # The regular test_app fixture has a2a=False

tests/unittests/evaluation/test_local_eval_service.py

@@ -536,9 +536,6 @@ def test_generate_final_eval_status_doesn_t_throw_on(eval_service):
 
 
 @pytest.mark.asyncio
-@pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="MCP tool requires Python 3.10+"
-)
 async def test_mcp_stdio_agent_no_runtime_error(mocker):
   """Test that LocalEvalService can handle MCP stdio agents without RuntimeError.
 

tests/unittests/plugins/test_reflect_retry_tool_plugin.py

@@ -57,10 +57,8 @@ class CustomErrorExtractionPlugin(ReflectAndRetryToolPlugin):
     return None
 
 
-# Inheriting from IsolatedAsyncioTestCase ensures these tests works in Python
-# 3.9. See https://github.com/pytest-dev/pytest-asyncio/issues/1039
-# Without this, the tests will fail with a "RuntimeError: There is no current
-# event loop in thread 'MainThread'."
+# Inheriting from IsolatedAsyncioTestCase ensures consistent behavior.
+# See https://github.com/pytest-dev/pytest-asyncio/issues/1039
 class TestReflectAndRetryToolPlugin(IsolatedAsyncioTestCase):
   """Comprehensive tests for ReflectAndRetryToolPlugin focusing on behavior."""
 

tests/unittests/telemetry/test_functional.py

@@ -103,7 +103,7 @@ async def test_tracer_start_as_current_span(
         isinstance(referrer, Aclosing)
         or isinstance(indirect_referrer, Aclosing)
         for referrer in gc.get_referrers(coro)
-        # Some coroutines have a layer of indirection in python 3.9 and 3.10
+        # Some coroutines have a layer of indirection in Python 3.10
         for indirect_referrer in gc.get_referrers(referrer)
     ), f'Coro `{coro.__name__}` is not wrapped with Aclosing'
     firstiter(coro)

tests/unittests/tools/computer_use/test_computer_use_tool.py

@@ -47,7 +47,7 @@ class TestComputerUseTool:
   @pytest.fixture
   def mock_computer_function(self):
     """Fixture providing a mock computer function."""
-    # Create a real async function instead of AsyncMock for Python 3.9 compatibility
+    # Create a real async function instead of AsyncMock for better test control
     calls = []
 
     async def mock_func(*args, **kwargs):

tests/unittests/tools/mcp_tool/test_mcp_session_manager.py

@@ -22,46 +22,14 @@ from unittest.mock import AsyncMock
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
+from google.adk.tools.mcp_tool.mcp_session_manager import retry_on_errors
+from google.adk.tools.mcp_tool.mcp_session_manager import SseConnectionParams
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
+from mcp import StdioServerParameters
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="MCP tool requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
-  from google.adk.tools.mcp_tool.mcp_session_manager import retry_on_errors
-  from google.adk.tools.mcp_tool.mcp_session_manager import SseConnectionParams
-  from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
-  from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyClass:
-      pass
-
-    MCPSessionManager = DummyClass
-    retry_on_errors = lambda x: x
-    SseConnectionParams = DummyClass
-    StdioConnectionParams = DummyClass
-    StreamableHTTPConnectionParams = DummyClass
-  else:
-    raise e
-
-# Import real MCP classes
-try:
-  from mcp import StdioServerParameters
-except ImportError:
-  # Create a mock if MCP is not available
-  class StdioServerParameters:
-
-    def __init__(self, command="test_command", args=None):
-      self.command = command
-      self.args = args or []
-
 
 class MockClientSession:
   """Mock ClientSession for testing."""

tests/unittests/tools/mcp_tool/test_mcp_tool.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 from unittest.mock import AsyncMock
 from unittest.mock import Mock
 from unittest.mock import patch
@@ -23,39 +22,15 @@ from google.adk.auth.auth_credential import HttpAuth
 from google.adk.auth.auth_credential import HttpCredentials
 from google.adk.auth.auth_credential import OAuth2Auth
 from google.adk.auth.auth_credential import ServiceAccount
+from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
+from google.adk.tools.mcp_tool.mcp_tool import MCPTool
+from google.adk.tools.tool_context import ToolContext
+from google.genai.types import FunctionDeclaration
+from google.genai.types import Type
+from mcp.types import CallToolResult
+from mcp.types import TextContent
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="MCP tool requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
-  from google.adk.tools.mcp_tool.mcp_tool import MCPTool
-  from google.adk.tools.tool_context import ToolContext
-  from google.genai.types import FunctionDeclaration
-  from google.genai.types import Type
-  from mcp.types import CallToolResult
-  from mcp.types import TextContent
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyClass:
-      pass
-
-    MCPSessionManager = DummyClass
-    MCPTool = DummyClass
-    ToolContext = DummyClass
-    FunctionDeclaration = DummyClass
-    Type = DummyClass
-    CallToolResult = DummyClass
-    TextContent = DummyClass
-  else:
-    raise e
-
 
 # Mock MCP Tool from mcp.types
 class MockMCPTool:

tests/unittests/tools/mcp_tool/test_mcp_toolset.py

@@ -20,47 +20,17 @@ from unittest.mock import AsyncMock
 from unittest.mock import Mock
 from unittest.mock import patch
 
+from google.adk.agents.readonly_context import ReadonlyContext
 from google.adk.auth.auth_credential import AuthCredential
+from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
+from google.adk.tools.mcp_tool.mcp_session_manager import SseConnectionParams
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
+from google.adk.tools.mcp_tool.mcp_tool import MCPTool
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from mcp import StdioServerParameters
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="MCP tool requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.agents.readonly_context import ReadonlyContext
-  from google.adk.tools.mcp_tool.mcp_session_manager import MCPSessionManager
-  from google.adk.tools.mcp_tool.mcp_session_manager import SseConnectionParams
-  from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
-  from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
-  from google.adk.tools.mcp_tool.mcp_tool import MCPTool
-  from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
-  from mcp import StdioServerParameters
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyClass:
-      pass
-
-    class StdioServerParameters:
-
-      def __init__(self, command="test_command", args=None):
-        self.command = command
-        self.args = args or []
-
-    MCPSessionManager = DummyClass
-    SseConnectionParams = DummyClass
-    StdioConnectionParams = DummyClass
-    StreamableHTTPConnectionParams = DummyClass
-    MCPTool = DummyClass
-    MCPToolset = DummyClass
-    ReadonlyContext = DummyClass
-  else:
-    raise e
-
 
 class MockMCPTool:
   """Mock MCP Tool for testing."""

tests/unittests/tools/retrieval/test_files_retrieval.py

@@ -14,7 +14,6 @@
 
 """Tests for FilesRetrieval tool."""
 
-import sys
 import unittest.mock as mock
 
 from google.adk.tools.retrieval.files_retrieval import _get_default_embedding_model
@@ -111,9 +110,6 @@ class TestFilesRetrieval:
 
   def test_get_default_embedding_model_success(self):
     """Test _get_default_embedding_model returns Google embedding when available."""
-    # Skip this test in Python 3.9 where llama_index.embeddings.google_genai may not be available
-    if sys.version_info < (3, 10):
-      pytest.skip("llama_index.embeddings.google_genai requires Python 3.10+")
 
     # Mock the module creation to avoid import issues
     mock_module = mock.MagicMock()

tests/unittests/tools/test_mcp_toolset.py

@@ -14,31 +14,12 @@
 
 """Unit tests for McpToolset."""
 
-import sys
 from unittest.mock import AsyncMock
 from unittest.mock import MagicMock
 
+from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
 import pytest
 
-# Skip all tests in this module if Python version is less than 3.10
-pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="MCP tool requires Python 3.10+"
-)
-
-# Import dependencies with version checking
-try:
-  from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyClass:
-      pass
-
-    McpToolset = DummyClass
-  else:
-    raise e
-
 
 @pytest.mark.asyncio
 async def test_mcp_toolset_with_prefix():