diff --git a/driving_log_replayer_v2/driving_log_replayer_v2/diagnostics.py b/driving_log_replayer_v2/driving_log_replayer_v2/diagnostics.py
index ed0c0a6..c799e16 100644
--- a/driving_log_replayer_v2/driving_log_replayer_v2/diagnostics.py
+++ b/driving_log_replayer_v2/driving_log_replayer_v2/diagnostics.py
@@ -17,10 +17,14 @@
 from typing import Literal
 
 from builtin_interfaces.msg import Time
-from diagnostic_msgs.msg import DiagnosticArray, DiagnosticStatus
-from pydantic import BaseModel, Field, model_validator
-
-from driving_log_replayer_v2.result import EvaluationItem, ResultBase
+from diagnostic_msgs.msg import DiagnosticArray
+from diagnostic_msgs.msg import DiagnosticStatus
+from pydantic import BaseModel
+from pydantic import Field
+from pydantic import model_validator
+
+from driving_log_replayer_v2.result import EvaluationItem
+from driving_log_replayer_v2.result import ResultBase
 from driving_log_replayer_v2.scenario import Scenario
 
 
diff --git a/driving_log_replayer_v2/test/unittest/test_diagnostics.py b/driving_log_replayer_v2/test/unittest/test_diagnostics.py
index 877c401..251bbc4 100644
--- a/driving_log_replayer_v2/test/unittest/test_diagnostics.py
+++ b/driving_log_replayer_v2/test/unittest/test_diagnostics.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from collections.abc import Callable
 from typing import Literal
 
 from builtin_interfaces.msg import Time