Update run_tests.yml

Author: felixchenier

.github/workflows/run_tests.yml

@@ -38,16 +38,16 @@ jobs:
       run: |
         export PYTHONPATH=":kineticstoolkit_extensions"
         echo "Running tests with PYTHONPATH=$PYTHONPATH"
-        pytest tests -W error::RuntimeWarning
+        pytest -W error::RuntimeWarning
     - name: Test with pytest and crash on warnings (linux)
       if: matrix.os == 'ubuntu-latest'
       run: |
         export PYTHONPATH=":kineticstoolkit_extensions"
         echo "Running tests with PYTHONPATH=$PYTHONPATH"
-        pytest tests -W error::RuntimeWarning
+        pytest -W error::RuntimeWarning
     - name: Test with pytest and crash on warnings (windows)
       if: matrix.os == 'windows-latest'
       run: |
         export PYTHONPATH=";kineticstoolkit_extensions"
         echo "Running tests with PYTHONPATH=$PYTHONPATH"
-        pytest tests -W error::RuntimeWarning
+        pytest -W error::RuntimeWarning