diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index cee219e1..7f188350 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -36,6 +36,8 @@ jobs:
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
+      env:
+        PYTHONPATH: ./src/
       run: |
         coverage run --source=src/palantir/ -m pytest tests/*.py
     - name: Upload coverage reports to Codecov