Only test pytest folder for pytests

Author: MilesCranmer

.github/workflows/tests.yml

@@ -81,7 +81,7 @@ jobs:
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Run tests
         run: |
-          pytest -s --nbval --cov=pysrc
+          pytest -s --nbval --cov=pysrc ./pytest/
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v2
         env: