diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 24a0c0a..ea3a216 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -22,4 +22,4 @@ jobs:
           poetry install
       - name: Run tox
         # Run tox using the version of Python in `PATH`
-        run: tox -e py
+        run: poetry run tox -e py