test fix

Author: C-Achard

tox.ini

@@ -29,8 +29,8 @@ passenv =
     PYVISTA_OFF_SCREEN
 deps =
     -rrequirements.txt
-;    pytest  # https://docs.pytest.org/en/latest/contents.html
-;    pytest-cov  # https://pytest-cov.readthedocs.io/en/latest/
+    pytest  # https://docs.pytest.org/en/latest/contents.html
+    pytest-cov  # https://pytest-cov.readthedocs.io/en/latest/
 ;    # you can remove these if you don't use them
 ;    napari
 ;    magicgui