diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 94976812..ad7c3d43 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -28,11 +28,12 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install -e .
-        python -m pip install pytest pytest-cov numpy
+        python -m pip install -e .[arrays,test]
     - name: Test source code and docs
       run: |
         pytest --cov . --cov-report xml
+      env:
+        PYTHONSAFEPATH: "TRUE"
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v4.0.1
       with:
diff --git a/pyproject.toml b/pyproject.toml
index 10479bf4..1655f5d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -66,4 +66,5 @@ doc = ["sphinx", "sphinx-copybutton", "python-docs-theme"]
 all = ["uncertainties[doc,test,arrays]"]
 
 [tool.pytest.ini_options]
+# import-mode = "importlib"
 testpaths = ["tests"]