no parallel testing

Author: MarcoGorelli

.github/workflows/pytest.yml

@@ -80,7 +80,7 @@ jobs:
           use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
       - run: |
           conda activate testenv
-          python -m pytest -vv --cov=pymc3 --cov-report=xml --cov-report term --durations=50 $TEST_SUBSET -n auto
+          python -m pytest -vv --cov=pymc3 --cov-report=xml --cov-report term --durations=50 $TEST_SUBSET
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v1
         with:

environment-dev.yml

@@ -24,7 +24,6 @@ dependencies:
   - pre-commit>=2.8.0
   - pytest-cov>=2.5
   - pytest>=3.0
-  - pytest-xdist
   - recommonmark>=0.4
   - seaborn>=0.8
   - sphinx-autobuild>=0.7