diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index bd0a8ecf9..bb6b1f52b 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -31,4 +31,7 @@ jobs:
         sudo meson install
     - name: Run unit tests with Pytest
       run: |
-        PYTHONSAFEPATH=1 PYTHONPATH=/usr/local/lib/python3.8/site-packages ./run-tests
+        mkdir dummydir
+        # Change to dummy directory to prevent adding the source root to sys.path
+        cd dummydir
+        PYTHONPATH=/usr/local/lib/python3.8/site-packages ../run-tests