Note: I'm using Python 3.7 and OpenCV 3.4.3, for people using others versions of these some instructions may be different. Disclaimer: The program works ok but is a little bit noisy sometimes, it ...

A cv2 import statement has pytest-cov looking for two source files in cwd instead of in site-packages/cv2. So two warnings are issued, because coverage doesn't find config.py and config-3.py. This ...