diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index ccef1bc6..993ab784 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -21,5 +21,6 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
+        pip install -e .
     - name: Test with tox
       run: tox