diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 78238bd66d60..f69cbb7ef77c 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -23,10 +23,10 @@ jobs:
       PGUSER: "odoo"
     steps:
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.7
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Configuration
         run: |
           sudo apt update
diff --git a/.github/workflows/flake.yml b/.github/workflows/flake.yml
index 8655919a6272..44c67fc5b9b0 100644
--- a/.github/workflows/flake.yml
+++ b/.github/workflows/flake.yml
@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.7
-      - uses: actions/checkout@v2
+          python-version: 3.8
+      - uses: actions/checkout@v4
       - name: Configuration
-        run: pip install flake8==3.4.1
+        run: pip install flake8==4.0.1
       - name: Flake8 Script
         run: |
           flake8 odoo/openupgrade --max-line-length=120
@@ -27,4 +27,7 @@ jobs:
           # only flake8 migration scripts from the openupgrade project, presumably
           # identifiable by using the openupgrade helpers
           flake8 --max-line-length=120 scripts $(find . \( -name 'pre-*.py' -or -name 'post-*.py' -or -name 'end-*.py' \) -exec grep -q openupgrade {} \; -print)
-          flake8 addons/*/migrations/*/tests/ --max-line-length=120
+          if ls addons/*/migrations/*/tests/ > /dev/null 2>&1; then
+            flake8 addons/*/migrations/*/tests/ --max-line-length=120 --filename=__init__.py --ignore=F401
+            flake8 addons/*/migrations/*/tests/ --max-line-length=120 --exclude=__init__.py
+          fi
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 32b607aa54b1..8c8afabb3c1a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,7 +23,7 @@ jobs:
       PGUSER: "odoo"
     steps:
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.7
       - name: Configure Postgres
@@ -50,7 +50,7 @@ jobs:
           # Line below may fail quite often due to Travis bug:
           # - git reset -q --hard $TRAVIS_COMMIT
           # Install Python requirements of target release
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Configuration
         run: |
           sudo apt update
diff --git a/addons/stock/migrations/13.0.1.1/post-migration.py b/addons/stock/migrations/13.0.1.1/post-migration.py
index bc39a6bd5ef6..5a9a769f1c44 100644
--- a/addons/stock/migrations/13.0.1.1/post-migration.py
+++ b/addons/stock/migrations/13.0.1.1/post-migration.py
@@ -195,7 +195,7 @@ def map_stock_picking_responsible_responsible_id_to_user_id(env):
         return
 
     env.cr.execute(
-        f"""
+        """
         SELECT distinct rp.id,
                         rp.name,
                         rp.company_id,
@@ -225,7 +225,7 @@ def map_stock_picking_responsible_responsible_id_to_user_id(env):
     # map responsible_id to user_id
     openupgrade.logged_query(
         env.cr,
-        f"""
+        """
         WITH partner_user AS (
             SELECT sp.id AS picking_id,
                    rp.id AS partner_id,
diff --git a/addons/website/migrations/13.0.1.0/post-migration.py b/addons/website/migrations/13.0.1.0/post-migration.py
index 2cf796974043..8d0928b604a0 100644
--- a/addons/website/migrations/13.0.1.0/post-migration.py
+++ b/addons/website/migrations/13.0.1.0/post-migration.py
@@ -48,7 +48,7 @@ def _set_data_anchor_xml_attribute(env):
     )
     for view in website_views:
         doc = fromstring(view.arch_db)
-        links = doc.cssselect("a[href^=\#]:not([href=\#])")
+        links = doc.cssselect(r"a[href^=\#]:not([href=\#])")
         if links:
             replacement = {
                 "selector": ", ".join([link.attrib["href"] for link in links]),