diff --git a/.github/workflows/python_matrix.yml b/.github/workflows/python_matrix.yml
index ab48c2be83..5901e584aa 100644
--- a/.github/workflows/python_matrix.yml
+++ b/.github/workflows/python_matrix.yml
@@ -49,4 +49,4 @@ jobs:
         run: python -m pip install --upgrade pip setuptools wheel
       - run: python -m pip install -r tests/requirements/py3.txt -e .
       - name: Run tests
-        run: python tests/runtests.py -v2
+        run: python -Wall tests/runtests.py -v2
diff --git a/.github/workflows/schedule_tests.yml b/.github/workflows/schedule_tests.yml
index 1ca766f7f3..5e6038fb31 100644
--- a/.github/workflows/schedule_tests.yml
+++ b/.github/workflows/schedule_tests.yml
@@ -36,7 +36,7 @@ jobs:
         run: python -m pip install --upgrade pip setuptools wheel
       - run: python -m pip install -r tests/requirements/py3.txt -e .
       - name: Run tests
-        run: python tests/runtests.py -v2
+        run: python -Wall tests/runtests.py -v2
 
   pyc-only:
     runs-on: ubuntu-latest
@@ -62,7 +62,7 @@ jobs:
           find $DJANGO_PACKAGE_ROOT -name '*.py' -print -delete
       - run: python -m pip install -r tests/requirements/py3.txt
       - name: Run tests
-        run: python tests/runtests.py --verbosity=2
+        run: python -Wall tests/runtests.py --verbosity=2
 
   pypy-sqlite:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5de554721d..3373f82e0a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -38,7 +38,7 @@ jobs:
         run: python -m pip install --upgrade pip setuptools wheel
       - run: python -m pip install -r tests/requirements/py3.txt -e .
       - name: Run tests
-        run: python tests/runtests.py -v2
+        run: python -Wall tests/runtests.py -v2
 
   javascript-tests:
     runs-on: ubuntu-latest