diff --git a/.github/workflows/checks_template.yml b/.github/workflows/checks_template.yml
index 27fc0ad6..5770e31e 100644
--- a/.github/workflows/checks_template.yml
+++ b/.github/workflows/checks_template.yml
@@ -74,6 +74,15 @@ jobs:
             blackdoc tests/${{ inputs.integration_name }} --check --diff
           fi
 
+      - name: Flake8
+        run: |
+          if [ -e optuna_integration/${{ inputs.integration_name }} ]; then
+            flake8 optuna_integration/${{ inputs.integration_name }}
+          fi
+          if [ -e tests/${{ inputs.integration_name }} ]; then
+            flake8 tests/${{ inputs.integration_name }}
+          fi
+
   tests:
     runs-on: ubuntu-latest
     strategy:
diff --git a/optuna_integration/botorch/botorch.py b/optuna_integration/botorch/botorch.py
index d4aa8f0b..2b792387 100644
--- a/optuna_integration/botorch/botorch.py
+++ b/optuna_integration/botorch/botorch.py
@@ -1,3 +1,5 @@
+# flake8: noqa
+
 from __future__ import annotations
 
 from collections.abc import Callable
diff --git a/optuna_integration/comet/comet.py b/optuna_integration/comet/comet.py
index 3aa76705..24cc2d8e 100644
--- a/optuna_integration/comet/comet.py
+++ b/optuna_integration/comet/comet.py
@@ -1,3 +1,5 @@
+# flake8: noqa
+
 from __future__ import annotations
 
 from collections.abc import Callable