diff --git a/.github/workflows/python-unit-tests.yml b/.github/workflows/python-unit-tests.yml
index 8f8f46e9..3fc6bd94 100644
--- a/.github/workflows/python-unit-tests.yml
+++ b/.github/workflows/python-unit-tests.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - name: Checkout code
@@ -48,14 +48,6 @@ jobs:
     - name: Run unit tests with pytest
       run: |
         source .venv/bin/activate
-        if [[ "${{ matrix.python-version }}" == "3.9" ]]; then
-          pytest tests/unittests \
-            --ignore=tests/unittests/a2a \
-            --ignore=tests/unittests/tools/mcp_tool \
-            --ignore=tests/unittests/artifacts/test_artifact_service.py \
-            --ignore=tests/unittests/tools/google_api_tool/test_googleapi_to_openapi_converter.py
-        else
-          pytest tests/unittests \
-            --ignore=tests/unittests/artifacts/test_artifact_service.py \
-            --ignore=tests/unittests/tools/google_api_tool/test_googleapi_to_openapi_converter.py
-        fi
\ No newline at end of file
+        pytest tests/unittests \
+          --ignore=tests/unittests/artifacts/test_artifact_service.py \
+          --ignore=tests/unittests/tools/google_api_tool/test_googleapi_to_openapi_converter.py
\ No newline at end of file
diff --git a/contributing/samples/migrate_session_db/sample-output/alembic.ini b/contributing/samples/migrate_session_db/sample-output/alembic.ini
index 64053209..e346ee8a 100644
--- a/contributing/samples/migrate_session_db/sample-output/alembic.ini
+++ b/contributing/samples/migrate_session_db/sample-output/alembic.ini
@@ -21,7 +21,7 @@ prepend_sys_path = .
 
 # timezone to use when rendering the date within the migration file
 # as well as the filename.
-# If specified, requires the python>=3.9 or backports.zoneinfo library and tzdata library.
+# If specified, requires the python>=3.10 and tzdata library.
 # Any required deps can installed by adding `alembic[tz]` to the pip requirements
 # string value is passed to ZoneInfo()
 # leave blank for localtime
diff --git a/contributing/samples/telemetry/main.py b/contributing/samples/telemetry/main.py
index e580060d..c6e05f0f 100755
--- a/contributing/samples/telemetry/main.py
+++ b/contributing/samples/telemetry/main.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import asyncio
+from contextlib import aclosing
 import os
 import time
 
@@ -46,19 +47,16 @@ async def main():
         role='user', parts=[types.Part.from_text(text=new_message)]
     )
     print('** User says:', content.model_dump(exclude_none=True))
-    # TODO - migrate try...finally to contextlib.aclosing after Python 3.9 is
-    # no longer supported.
-    agen = runner.run_async(
-        user_id=user_id_1,
-        session_id=session.id,
-        new_message=content,
-    )
-    try:
+    async with aclosing(
+        runner.run_async(
+            user_id=user_id_1,
+            session_id=session.id,
+            new_message=content,
+        )
+    ) as agen:
       async for event in agen:
         if event.content.parts and event.content.parts[0].text:
           print(f'** {event.author}: {event.content.parts[0].text}')
-    finally:
-      await agen.aclose()
 
   async def run_prompt_bytes(session: Session, new_message: str):
     content = types.Content(
@@ -70,20 +68,17 @@ async def main():
         ],
     )
     print('** User says:', content.model_dump(exclude_none=True))
-    # TODO - migrate try...finally to contextlib.aclosing after Python 3.9 is
-    # no longer supported.
-    agen = runner.run_async(
-        user_id=user_id_1,
-        session_id=session.id,
-        new_message=content,
-        run_config=RunConfig(save_input_blobs_as_artifacts=True),
-    )
-    try:
+    async with aclosing(
+        runner.run_async(
+            user_id=user_id_1,
+            session_id=session.id,
+            new_message=content,
+            run_config=RunConfig(save_input_blobs_as_artifacts=True),
+        )
+    ) as agen:
       async for event in agen:
         if event.content.parts and event.content.parts[0].text:
           print(f'** {event.author}: {event.content.parts[0].text}')
-    finally:
-      await agen.aclose()
 
   start_time = time.time()
   print('Start time:', start_time)
diff --git a/llms-full.txt b/llms-full.txt
index 4c744512..b84e9496 100644
--- a/llms-full.txt
+++ b/llms-full.txt
@@ -5620,7 +5620,7 @@ pip install google-cloud-aiplatform[adk,agent_engines]
 ```
 
 !!!info
-    Agent Engine only supported Python version >=3.9 and <=3.12.
+    Agent Engine only supported Python version >=3.10 and <=3.12.
 
 ### Initialization
 
@@ -8073,7 +8073,7 @@ setting up a basic agent with multiple tools, and running it locally either in t
 <!-- <img src="../../assets/quickstart.png" alt="Quickstart setup"> -->
 
 This quickstart assumes a local IDE (VS Code, PyCharm, IntelliJ IDEA, etc.)
-with Python 3.9+ or Java 17+ and terminal access. This method runs the
+with Python 3.10+ or Java 17+ and terminal access. This method runs the
 application entirely on your machine and is recommended for internal development.
 
 ## 1. Set up Environment & Install ADK {#venv-install}
@@ -16475,7 +16475,7 @@ This guide covers two primary integration patterns:
 Before you begin, ensure you have the following set up:
 
 * **Set up ADK:** Follow the standard ADK [setup instructions](../get-started/quickstart.md/#venv-install) in the quickstart.
-* **Install/update Python/Java:** MCP requires Python version of 3.9 or higher for Python or Java 17+.
+* **Install/update Python/Java:** MCP requires Python version of 3.10 or higher for Python or Java 17+.
 * **Setup Node.js and npx:** **(Python only)** Many community MCP servers are distributed as Node.js packages and run using `npx`. Install Node.js (which includes npx) if you haven't already. For details, see [https://nodejs.org/en](https://nodejs.org/en).
 * **Verify Installations:** **(Python only)** Confirm `adk` and `npx` are in your PATH within the activated virtual environment:
 
diff --git a/src/google/adk/a2a/converters/part_converter.py b/src/google/adk/a2a/converters/part_converter.py
index a21042cc..dfe6f4a0 100644
--- a/src/google/adk/a2a/converters/part_converter.py
+++ b/src/google/adk/a2a/converters/part_converter.py
@@ -26,23 +26,11 @@ from typing import List
 from typing import Optional
 from typing import Union
 
-from .utils import _get_adk_metadata_key
-
-try:
-  from a2a import types as a2a_types
-except ImportError as e:
-  import sys
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'A2A requires Python 3.10 or above. Please upgrade your Python version.'
-    ) from e
-  else:
-    raise e
-
+from a2a import types as a2a_types
 from google.genai import types as genai_types
 
 from ..experimental import a2a_experimental
+from .utils import _get_adk_metadata_key
 
 logger = logging.getLogger('google_adk.' + __name__)
 
diff --git a/src/google/adk/a2a/converters/request_converter.py b/src/google/adk/a2a/converters/request_converter.py
index 39db41da..1746ec0b 100644
--- a/src/google/adk/a2a/converters/request_converter.py
+++ b/src/google/adk/a2a/converters/request_converter.py
@@ -15,23 +15,12 @@
 from __future__ import annotations
 
 from collections.abc import Callable
-import sys
 from typing import Any
 from typing import Optional
 
-from pydantic import BaseModel
-
-try:
-  from a2a.server.agent_execution import RequestContext
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'A2A requires Python 3.10 or above. Please upgrade your Python version.'
-    ) from e
-  else:
-    raise e
-
+from a2a.server.agent_execution import RequestContext
 from google.genai import types as genai_types
+from pydantic import BaseModel
 
 from ...runners import RunConfig
 from ..experimental import a2a_experimental
diff --git a/src/google/adk/a2a/executor/a2a_agent_executor.py b/src/google/adk/a2a/executor/a2a_agent_executor.py
index 608a8188..b6880aaa 100644
--- a/src/google/adk/a2a/executor/a2a_agent_executor.py
+++ b/src/google/adk/a2a/executor/a2a_agent_executor.py
@@ -23,34 +23,22 @@ from typing import Callable
 from typing import Optional
 import uuid
 
-from ...utils.context_utils import Aclosing
-
-try:
-  from a2a.server.agent_execution import AgentExecutor
-  from a2a.server.agent_execution.context import RequestContext
-  from a2a.server.events.event_queue import EventQueue
-  from a2a.types import Artifact
-  from a2a.types import Message
-  from a2a.types import Role
-  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
-
-except ImportError as e:
-  import sys
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'A2A requires Python 3.10 or above. Please upgrade your Python version.'
-    ) from e
-  else:
-    raise e
+from a2a.server.agent_execution import AgentExecutor
+from a2a.server.agent_execution.context import RequestContext
+from a2a.server.events.event_queue import EventQueue
+from a2a.types import Artifact
+from a2a.types import Message
+from a2a.types import Role
+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.runners import Runner
 from pydantic import BaseModel
 from typing_extensions import override
 
+from ...utils.context_utils import Aclosing
 from ..converters.event_converter import AdkEventToA2AEventsConverter
 from ..converters.event_converter import convert_event_to_a2a_events
 from ..converters.part_converter import A2APartToGenAIPartConverter
diff --git a/src/google/adk/a2a/utils/agent_card_builder.py b/src/google/adk/a2a/utils/agent_card_builder.py
index aa7f657f..c0078709 100644
--- a/src/google/adk/a2a/utils/agent_card_builder.py
+++ b/src/google/adk/a2a/utils/agent_card_builder.py
@@ -15,25 +15,15 @@
 from __future__ import annotations
 
 import re
-import sys
 from typing import Dict
 from typing import List
 from typing import Optional
 
-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
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'A2A requires Python 3.10 or above. Please upgrade your Python version.'
-    ) from e
-  else:
-    raise e
-
+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 ...agents.base_agent import BaseAgent
 from ...agents.llm_agent import LlmAgent
diff --git a/src/google/adk/a2a/utils/agent_to_a2a.py b/src/google/adk/a2a/utils/agent_to_a2a.py
index 72a2292f..1a1ba356 100644
--- a/src/google/adk/a2a/utils/agent_to_a2a.py
+++ b/src/google/adk/a2a/utils/agent_to_a2a.py
@@ -15,30 +15,18 @@
 from __future__ import annotations
 
 import logging
-import sys
-
-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
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        "A2A requires Python 3.10 or above. Please upgrade your Python version."
-    ) from e
-  else:
-    raise e
-
 from typing import Optional
 from typing import Union
 
+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 starlette.applications import Starlette
 
 from ...agents.base_agent import BaseAgent
 from ...artifacts.in_memory_artifact_service import InMemoryArtifactService
 from ...auth.credential_service.in_memory_credential_service import InMemoryCredentialService
-from ...cli.utils.logs import setup_adk_logger
 from ...memory.in_memory_memory_service import InMemoryMemoryService
 from ...runners import Runner
 from ...sessions.in_memory_session_service import InMemorySessionService
@@ -117,7 +105,8 @@ def to_a2a(
       app = to_a2a(agent, agent_card=my_custom_agent_card)
   """
   # Set up ADK logging to ensure logs are visible when using uvicorn directly
-  setup_adk_logger(logging.INFO)
+  adk_logger = logging.getLogger("google_adk")
+  adk_logger.setLevel(logging.INFO)
 
   async def create_runner() -> Runner:
     """Create a runner for the agent."""
diff --git a/src/google/adk/agents/__init__.py b/src/google/adk/agents/__init__.py
index 5710a21b..b5f8e88c 100644
--- a/src/google/adk/agents/__init__.py
+++ b/src/google/adk/agents/__init__.py
@@ -12,9 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import logging
-import sys
-
 from .base_agent import BaseAgent
 from .invocation_context import InvocationContext
 from .live_request_queue import LiveRequest
@@ -22,6 +19,7 @@ from .live_request_queue import LiveRequestQueue
 from .llm_agent import Agent
 from .llm_agent import LlmAgent
 from .loop_agent import LoopAgent
+from .mcp_instruction_provider import McpInstructionProvider
 from .parallel_agent import ParallelAgent
 from .run_config import RunConfig
 from .sequential_agent import SequentialAgent
@@ -31,6 +29,7 @@ __all__ = [
     'BaseAgent',
     'LlmAgent',
     'LoopAgent',
+    'McpInstructionProvider',
     'ParallelAgent',
     'SequentialAgent',
     'InvocationContext',
@@ -38,16 +37,3 @@ __all__ = [
     'LiveRequestQueue',
     'RunConfig',
 ]
-
-if sys.version_info < (3, 10):
-  logger = logging.getLogger('google_adk.' + __name__)
-  logger.warning(
-      'MCP requires Python 3.10 or above. Please upgrade your Python'
-      ' version in order to use it.'
-  )
-else:
-  from .mcp_instruction_provider import McpInstructionProvider
-
-  __all__.extend([
-      'McpInstructionProvider',
-  ])
diff --git a/src/google/adk/agents/mcp_instruction_provider.py b/src/google/adk/agents/mcp_instruction_provider.py
index e9f40663..20896a7a 100644
--- a/src/google/adk/agents/mcp_instruction_provider.py
+++ b/src/google/adk/agents/mcp_instruction_provider.py
@@ -22,24 +22,12 @@ from typing import Any
 from typing import Dict
 from typing import TextIO
 
+from mcp import types
+
+from ..tools.mcp_tool.mcp_session_manager import MCPSessionManager
 from .llm_agent import InstructionProvider
 from .readonly_context import ReadonlyContext
 
-# Attempt to import MCP Session Manager from the MCP library, and hints user to
-# upgrade their Python version to 3.10 if it fails.
-try:
-  from mcp import types
-
-  from ..tools.mcp_tool.mcp_session_manager import MCPSessionManager
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        "MCP Session Manager requires Python 3.10 or above. Please upgrade"
-        " your Python version."
-    ) from e
-  else:
-    raise e
-
 
 class McpInstructionProvider(InstructionProvider):
   """Fetches agent instructions from an MCP server."""
diff --git a/src/google/adk/agents/parallel_agent.py b/src/google/adk/agents/parallel_agent.py
index f7270a75..09e65a67 100644
--- a/src/google/adk/agents/parallel_agent.py
+++ b/src/google/adk/agents/parallel_agent.py
@@ -48,19 +48,54 @@ def _create_branch_ctx_for_sub_agent(
   return invocation_context
 
 
+async def _merge_agent_run(
+    agent_runs: list[AsyncGenerator[Event, None]],
+) -> AsyncGenerator[Event, None]:
+  """Merges agent runs using asyncio.TaskGroup on Python 3.11+."""
+  sentinel = object()
+  queue = asyncio.Queue()
+
+  # Agents are processed in parallel.
+  # Events for each agent are put on queue sequentially.
+  async def process_an_agent(events_for_one_agent):
+    try:
+      async for event in events_for_one_agent:
+        resume_signal = asyncio.Event()
+        await queue.put((event, resume_signal))
+        # Wait for upstream to consume event before generating new events.
+        await resume_signal.wait()
+    finally:
+      # Mark agent as finished.
+      await queue.put((sentinel, None))
+
+  async with asyncio.TaskGroup() as tg:
+    for events_for_one_agent in agent_runs:
+      tg.create_task(process_an_agent(events_for_one_agent))
+
+    sentinel_count = 0
+    # Run until all agents finished processing.
+    while sentinel_count < len(agent_runs):
+      event, resume_signal = await queue.get()
+      # Agent finished processing.
+      if event is sentinel:
+        sentinel_count += 1
+      else:
+        yield event
+        # Signal to agent that it should generate next event.
+        resume_signal.set()
+
+
 # TODO - remove once Python <3.11 is no longer supported.
 async def _merge_agent_run_pre_3_11(
     agent_runs: list[AsyncGenerator[Event, None]],
 ) -> AsyncGenerator[Event, None]:
-  """Merges the agent run event generator.
-  This version works in Python 3.9 and 3.10 and uses custom replacement for
-  asyncio.TaskGroup for tasks cancellation and exception handling.
+  """Merges agent runs for Python 3.10 without asyncio.TaskGroup.
 
-  This implementation guarantees for each agent, it won't move on until the
-  generated event is processed by upstream runner.
+  Uses custom cancellation and exception handling to mirror TaskGroup
+  semantics. Each agent waits until the runner processes emitted events.
 
   Args:
-      agent_runs: A list of async generators that yield events from each agent.
+      agent_runs: Async generators that yield events from each agent.
 
   Yields:
       Event: The next event from the merged generator.
@@ -112,53 +147,6 @@ async def _merge_agent_run_pre_3_11(
       task.cancel()
 
 
-async def _merge_agent_run(
-    agent_runs: list[AsyncGenerator[Event, None]],
-) -> AsyncGenerator[Event, None]:
-  """Merges the agent run event generator.
-
-  This implementation guarantees for each agent, it won't move on until the
-  generated event is processed by upstream runner.
-
-  Args:
-      agent_runs: A list of async generators that yield events from each agent.
-
-  Yields:
-      Event: The next event from the merged generator.
-  """
-  sentinel = object()
-  queue = asyncio.Queue()
-
-  # Agents are processed in parallel.
-  # Events for each agent are put on queue sequentially.
-  async def process_an_agent(events_for_one_agent):
-    try:
-      async for event in events_for_one_agent:
-        resume_signal = asyncio.Event()
-        await queue.put((event, resume_signal))
-        # Wait for upstream to consume event before generating new events.
-        await resume_signal.wait()
-    finally:
-      # Mark agent as finished.
-      await queue.put((sentinel, None))
-
-  async with asyncio.TaskGroup() as tg:
-    for events_for_one_agent in agent_runs:
-      tg.create_task(process_an_agent(events_for_one_agent))
-
-    sentinel_count = 0
-    # Run until all agents finished processing.
-    while sentinel_count < len(agent_runs):
-      event, resume_signal = await queue.get()
-      # Agent finished processing.
-      if event is sentinel:
-        sentinel_count += 1
-      else:
-        yield event
-        # Signal to agent that it should generate next event.
-        resume_signal.set()
-
-
 class ParallelAgent(BaseAgent):
   """A shell agent that runs its sub-agents in parallel in an isolated manner.
 
@@ -195,13 +183,11 @@ class ParallelAgent(BaseAgent):
 
     pause_invocation = False
     try:
-      # TODO remove if once Python <3.11 is no longer supported.
       merge_func = (
           _merge_agent_run
           if sys.version_info >= (3, 11)
           else _merge_agent_run_pre_3_11
       )
-
       async with Aclosing(merge_func(agent_runs)) as agen:
         async for event in agen:
           yield event
diff --git a/src/google/adk/agents/remote_a2a_agent.py b/src/google/adk/agents/remote_a2a_agent.py
index 5d427309..8d133060 100644
--- a/src/google/adk/agents/remote_a2a_agent.py
+++ b/src/google/adk/agents/remote_a2a_agent.py
@@ -26,30 +26,22 @@ from typing import Union
 from urllib.parse import urlparse
 import uuid
 
-try:
-  from a2a.client import Client as A2AClient
-  from a2a.client import ClientEvent as A2AClientEvent
-  from a2a.client.card_resolver import A2ACardResolver
-  from a2a.client.client import ClientConfig as A2AClientConfig
-  from a2a.client.client_factory import ClientFactory as A2AClientFactory
-  from a2a.client.errors import A2AClientError
-  from a2a.types import AgentCard
-  from a2a.types import Message as A2AMessage
-  from a2a.types import Part as A2APart
-  from a2a.types import Role
-  from a2a.types import TaskArtifactUpdateEvent as A2ATaskArtifactUpdateEvent
-  from a2a.types import TaskState
-  from a2a.types import TaskStatusUpdateEvent as A2ATaskStatusUpdateEvent
-  from a2a.types import TransportProtocol as A2ATransport
-except ImportError as e:
-  import sys
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        "A2A requires Python 3.10 or above. Please upgrade your Python version."
-    ) from e
-  else:
-    raise e
+from a2a.client import Client as A2AClient
+from a2a.client import ClientEvent as A2AClientEvent
+from a2a.client.card_resolver import A2ACardResolver
+from a2a.client.client import ClientConfig as A2AClientConfig
+from a2a.client.client_factory import ClientFactory as A2AClientFactory
+from a2a.client.errors import A2AClientError
+from a2a.types import AgentCard
+from a2a.types import Message as A2AMessage
+from a2a.types import Part as A2APart
+from a2a.types import Role
+from a2a.types import TaskArtifactUpdateEvent as A2ATaskArtifactUpdateEvent
+from a2a.types import TaskState
+from a2a.types import TaskStatusUpdateEvent as A2ATaskStatusUpdateEvent
+from a2a.types import TransportProtocol as A2ATransport
+from google.genai import types as genai_types
+import httpx
 
 try:
   from a2a.utils.constants import AGENT_CARD_WELL_KNOWN_PATH
@@ -57,9 +49,6 @@ except ImportError:
   # Fallback for older versions of a2a-sdk.
   AGENT_CARD_WELL_KNOWN_PATH = "/.well-known/agent.json"
 
-from google.genai import types as genai_types
-import httpx
-
 from ..a2a.converters.event_converter import convert_a2a_message_to_event
 from ..a2a.converters.event_converter import convert_a2a_task_to_event
 from ..a2a.converters.event_converter import convert_event_to_a2a_message
diff --git a/src/google/adk/cli/fast_api.py b/src/google/adk/cli/fast_api.py
index f9170968..df06b1cf 100644
--- a/src/google/adk/cli/fast_api.py
+++ b/src/google/adk/cli/fast_api.py
@@ -342,25 +342,14 @@ def get_fast_api_app(
         )
 
   if a2a:
-    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 a2a.utils.constants import AGENT_CARD_WELL_KNOWN_PATH
+    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 a2a.utils.constants import AGENT_CARD_WELL_KNOWN_PATH
 
-      from ..a2a.executor.a2a_agent_executor import A2aAgentExecutor
+    from ..a2a.executor.a2a_agent_executor import A2aAgentExecutor
 
-    except ImportError as e:
-      import sys
-
-      if sys.version_info < (3, 10):
-        raise ImportError(
-            "A2A requires Python 3.10 or above. Please upgrade your Python"
-            " version."
-        ) from e
-      else:
-        raise e
     # locate all a2a agent apps in the agents directory
     base_path = Path.cwd() / agents_dir
     # the root agents directory should be an existing folder
diff --git a/src/google/adk/tools/crewai_tool.py b/src/google/adk/tools/crewai_tool.py
index eaef4792..875b82e5 100644
--- a/src/google/adk/tools/crewai_tool.py
+++ b/src/google/adk/tools/crewai_tool.py
@@ -30,16 +30,9 @@ from .tool_context import ToolContext
 try:
   from crewai.tools import BaseTool as CrewaiBaseTool
 except ImportError as e:
-  import sys
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'Crewai Tools require Python 3.10+. Please upgrade your Python version.'
-    ) from e
-  else:
-    raise ImportError(
-        "Crewai Tools require pip install 'google-adk[extensions]'."
-    ) from e
+  raise ImportError(
+      "Crewai Tools require pip install 'google-adk[extensions]'."
+  ) from e
 
 
 class CrewaiTool(FunctionTool):
diff --git a/src/google/adk/tools/mcp_tool/__init__.py b/src/google/adk/tools/mcp_tool/__init__.py
index f1e56b99..1170b2e1 100644
--- a/src/google/adk/tools/mcp_tool/__init__.py
+++ b/src/google/adk/tools/mcp_tool/__init__.py
@@ -39,15 +39,7 @@ try:
 
 except ImportError as e:
   import logging
-  import sys
 
   logger = logging.getLogger('google_adk.' + __name__)
-
-  if sys.version_info < (3, 10):
-    logger.warning(
-        'MCP Tool requires Python 3.10 or above. Please upgrade your Python'
-        ' version.'
-    )
-  else:
-    logger.debug('MCP Tool is not installed')
-    logger.debug(e)
+  logger.debug('MCP Tool is not installed')
+  logger.debug(e)
diff --git a/src/google/adk/tools/mcp_tool/mcp_session_manager.py b/src/google/adk/tools/mcp_tool/mcp_session_manager.py
index 7d9714aa..c9c4c2ae 100644
--- a/src/google/adk/tools/mcp_tool/mcp_session_manager.py
+++ b/src/google/adk/tools/mcp_tool/mcp_session_manager.py
@@ -29,24 +29,13 @@ from typing import TextIO
 from typing import Union
 
 import anyio
+from mcp import ClientSession
+from mcp import StdioServerParameters
+from mcp.client.sse import sse_client
+from mcp.client.stdio import stdio_client
+from mcp.client.streamable_http import streamablehttp_client
 from pydantic import BaseModel
 
-try:
-  from mcp import ClientSession
-  from mcp import StdioServerParameters
-  from mcp.client.sse import sse_client
-  from mcp.client.stdio import stdio_client
-  from mcp.client.streamable_http import streamablehttp_client
-except ImportError as e:
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        'MCP Tool requires Python 3.10 or above. Please upgrade your Python'
-        ' version.'
-    ) from e
-  else:
-    raise e
-
 logger = logging.getLogger('google_adk.' + __name__)
 
 
diff --git a/src/google/adk/tools/mcp_tool/mcp_tool.py b/src/google/adk/tools/mcp_tool/mcp_tool.py
index 284aea41..b15f2c73 100644
--- a/src/google/adk/tools/mcp_tool/mcp_tool.py
+++ b/src/google/adk/tools/mcp_tool/mcp_tool.py
@@ -17,7 +17,6 @@ from __future__ import annotations
 import base64
 import inspect
 import logging
-import sys
 from typing import Any
 from typing import Callable
 from typing import Dict
@@ -27,35 +26,21 @@ import warnings
 
 from fastapi.openapi.models import APIKeyIn
 from google.genai.types import FunctionDeclaration
+from mcp.types import Tool as McpBaseTool
 from typing_extensions import override
 
 from ...agents.readonly_context import ReadonlyContext
-from ...features import FeatureName
-from ...features import is_feature_enabled
-from .._gemini_schema_util import _to_gemini_schema
-from .mcp_session_manager import MCPSessionManager
-from .mcp_session_manager import retry_on_errors
-
-# Attempt to import MCP Tool from the MCP library, and hints user to upgrade
-# their Python version to 3.10 if it fails.
-try:
-  from mcp.types import Tool as McpBaseTool
-except ImportError as e:
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        "MCP Tool requires Python 3.10 or above. Please upgrade your Python"
-        " version."
-    ) from e
-  else:
-    raise e
-
-
 from ...auth.auth_credential import AuthCredential
 from ...auth.auth_schemes import AuthScheme
 from ...auth.auth_tool import AuthConfig
+from ...features import FeatureName
+from ...features import is_feature_enabled
+from .._gemini_schema_util import _to_gemini_schema
 from ..base_authenticated_tool import BaseAuthenticatedTool
 #  import
 from ..tool_context import ToolContext
+from .mcp_session_manager import MCPSessionManager
+from .mcp_session_manager import retry_on_errors
 
 logger = logging.getLogger("google_adk." + __name__)
 
diff --git a/src/google/adk/tools/mcp_tool/mcp_toolset.py b/src/google/adk/tools/mcp_tool/mcp_toolset.py
index 3768477e..035b7587 100644
--- a/src/google/adk/tools/mcp_tool/mcp_toolset.py
+++ b/src/google/adk/tools/mcp_tool/mcp_toolset.py
@@ -25,6 +25,8 @@ from typing import TextIO
 from typing import Union
 import warnings
 
+from mcp import StdioServerParameters
+from mcp.types import ListToolsResult
 from pydantic import model_validator
 from typing_extensions import override
 
@@ -41,23 +43,6 @@ from .mcp_session_manager import retry_on_errors
 from .mcp_session_manager import SseConnectionParams
 from .mcp_session_manager import StdioConnectionParams
 from .mcp_session_manager import StreamableHTTPConnectionParams
-
-# Attempt to import MCP Tool from the MCP library, and hints user to upgrade
-# their Python version to 3.10 if it fails.
-try:
-  from mcp import StdioServerParameters
-  from mcp.types import ListToolsResult
-except ImportError as e:
-  import sys
-
-  if sys.version_info < (3, 10):
-    raise ImportError(
-        "MCP Tool requires Python 3.10 or above. Please upgrade your Python"
-        " version."
-    ) from e
-  else:
-    raise e
-
 from .mcp_tool import MCPTool
 
 logger = logging.getLogger("google_adk." + __name__)
diff --git a/src/google/adk/utils/context_utils.py b/src/google/adk/utils/context_utils.py
index bd8dacb9..a75feae3 100644
--- a/src/google/adk/utils/context_utils.py
+++ b/src/google/adk/utils/context_utils.py
@@ -20,30 +20,7 @@ Please do not rely on the implementation details.
 
 from __future__ import annotations
 
-from contextlib import AbstractAsyncContextManager
-from typing import Any
-from typing import AsyncGenerator
+from contextlib import aclosing
 
-
-class Aclosing(AbstractAsyncContextManager):
-  """Async context manager for safely finalizing an asynchronously cleaned-up
-  resource such as an async generator, calling its ``aclose()`` method.
-  Needed to correctly close contexts for OTel spans.
-  See https://github.com/google/adk-python/issues/1670#issuecomment-3115891100.
-
-  Based on
-  https://docs.python.org/3/library/contextlib.html#contextlib.aclosing
-  which is available in Python 3.10+.
-
-  TODO: replace all occurrences with contextlib.aclosing once Python 3.9 is no
-  longer supported.
-  """
-
-  def __init__(self, async_generator: AsyncGenerator[Any, None]):
-    self.async_generator = async_generator
-
-  async def __aenter__(self):
-    return self.async_generator
-
-  async def __aexit__(self, *exc_info):
-    await self.async_generator.aclose()
+# Re-export aclosing for backward compatibility
+Aclosing = aclosing
diff --git a/tests/unittests/a2a/converters/test_event_converter.py b/tests/unittests/a2a/converters/test_event_converter.py
index cb3f7a68..49b7d3c2 100644
--- a/tests/unittests/a2a/converters/test_event_converter.py
+++ b/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."""
diff --git a/tests/unittests/a2a/converters/test_part_converter.py b/tests/unittests/a2a/converters/test_part_converter.py
index 5a8bad10..541ab770 100644
--- a/tests/unittests/a2a/converters/test_part_converter.py
+++ b/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."""
diff --git a/tests/unittests/a2a/converters/test_request_converter.py b/tests/unittests/a2a/converters/test_request_converter.py
index a7c21e4d..173b122d 100644
--- a/tests/unittests/a2a/converters/test_request_converter.py
+++ b/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."""
diff --git a/tests/unittests/a2a/converters/test_utils.py b/tests/unittests/a2a/converters/test_utils.py
index 6c851116..0d896852 100644
--- a/tests/unittests/a2a/converters/test_utils.py
+++ b/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."""
diff --git a/tests/unittests/a2a/executor/test_a2a_agent_executor.py b/tests/unittests/a2a/executor/test_a2a_agent_executor.py
index 4bcc7a91..58d7521f 100644
--- a/tests/unittests/a2a/executor/test_a2a_agent_executor.py
+++ b/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."""
diff --git a/tests/unittests/a2a/executor/test_task_result_aggregator.py b/tests/unittests/a2a/executor/test_task_result_aggregator.py
index 9d03db9d..b809b627 100644
--- a/tests/unittests/a2a/executor/test_task_result_aggregator.py
+++ b/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."""
diff --git a/tests/unittests/a2a/utils/test_agent_card_builder.py b/tests/unittests/a2a/utils/test_agent_card_builder.py
index e0b62468..3bf32028 100644
--- a/tests/unittests/a2a/utils/test_agent_card_builder.py
+++ b/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."""
diff --git a/tests/unittests/a2a/utils/test_agent_to_a2a.py b/tests/unittests/a2a/utils/test_agent_to_a2a.py
index ee80b023..503e572f 100644
--- a/tests/unittests/a2a/utils/test_agent_to_a2a.py
+++ b/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:
diff --git a/tests/unittests/agents/test_mcp_instruction_provider.py b/tests/unittests/agents/test_mcp_instruction_provider.py
index 1f2d098c..256d8126 100644
--- a/tests/unittests/agents/test_mcp_instruction_provider.py
+++ b/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."""
diff --git a/tests/unittests/agents/test_remote_a2a_agent.py b/tests/unittests/agents/test_remote_a2a_agent.py
index fd722abf..e7865f39 100644
--- a/tests/unittests/agents/test_remote_a2a_agent.py
+++ b/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(
diff --git a/tests/unittests/cli/test_fast_api.py b/tests/unittests/cli/test_fast_api.py
index 1fe04732..75d56790 100755
--- a/tests/unittests/cli/test_fast_api.py
+++ b/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
diff --git a/tests/unittests/evaluation/test_local_eval_service.py b/tests/unittests/evaluation/test_local_eval_service.py
index cf2ca342..66080828 100644
--- a/tests/unittests/evaluation/test_local_eval_service.py
+++ b/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.
 
diff --git a/tests/unittests/plugins/test_reflect_retry_tool_plugin.py b/tests/unittests/plugins/test_reflect_retry_tool_plugin.py
index 1e15f338..2cf52e99 100644
--- a/tests/unittests/plugins/test_reflect_retry_tool_plugin.py
+++ b/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."""
 
diff --git a/tests/unittests/telemetry/test_functional.py b/tests/unittests/telemetry/test_functional.py
index 409571ad..43fe6723 100644
--- a/tests/unittests/telemetry/test_functional.py
+++ b/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)
diff --git a/tests/unittests/tools/computer_use/test_computer_use_tool.py b/tests/unittests/tools/computer_use/test_computer_use_tool.py
index 4dbdfbb5..f3843b87 100644
--- a/tests/unittests/tools/computer_use/test_computer_use_tool.py
+++ b/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):
diff --git a/tests/unittests/tools/mcp_tool/test_mcp_session_manager.py b/tests/unittests/tools/mcp_tool/test_mcp_session_manager.py
index b2d6b1cb..74eabe9d 100644
--- a/tests/unittests/tools/mcp_tool/test_mcp_session_manager.py
+++ b/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."""
diff --git a/tests/unittests/tools/mcp_tool/test_mcp_tool.py b/tests/unittests/tools/mcp_tool/test_mcp_tool.py
index 17b1d8e5..1284e73b 100644
--- a/tests/unittests/tools/mcp_tool/test_mcp_tool.py
+++ b/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:
diff --git a/tests/unittests/tools/mcp_tool/test_mcp_toolset.py b/tests/unittests/tools/mcp_tool/test_mcp_toolset.py
index 82a5c9a3..5809efe5 100644
--- a/tests/unittests/tools/mcp_tool/test_mcp_toolset.py
+++ b/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."""
diff --git a/tests/unittests/tools/retrieval/test_files_retrieval.py b/tests/unittests/tools/retrieval/test_files_retrieval.py
index ea4b99cd..dfb7215d 100644
--- a/tests/unittests/tools/retrieval/test_files_retrieval.py
+++ b/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()
diff --git a/tests/unittests/tools/test_mcp_toolset.py b/tests/unittests/tools/test_mcp_toolset.py
index a3a6598e..7bfd9126 100644
--- a/tests/unittests/tools/test_mcp_toolset.py
+++ b/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():