@kyamagu it looks like the largest number of passed tests on CI is mac os x at the moment (110 skipped), and I just noticed that most of the GL related tests are being skipped on Linux (300+ skipped). So this is the opposite situation before the recent GL related fix for mac os x. I suspect the new GL settings doesn't quite work against Xvfb. I haven't noticed / checked CI as pytest gives 100- skipped on my own linux box. Probably a Xvfb issue there (Xvfb does not support higher GL versions). To investigate.