fix tests

mmcv/__init__.py

@@ -8,6 +8,6 @@ from .video import *
 from .visualization import *
 from .version import __version__
 # The following modules are not imported to this level, so mmcv may be used
-# without PyTorch：
+# without PyTorch.
 # - runner
 # - parallel

setup.cfg

@@ -2,4 +2,7 @@
 universal=1
 
 [aliases]
-test=pytest
+test=pytest
+
+[tool:pytest]
+addopts=tests/