============================= test session starts ==============================
platform linux -- Python 3.7.4, pytest-5.1.0, py-1.8.0, pluggy-0.12.0 -- /nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/bin/python
cachedir: .pytest_cache
rootdir: /build/imgaug-0.3.0
collecting ... [bg=False] Running UnnamedSequential...
[bg=False] Running UnnamedSomeOf...
[bg=False] Running UnnamedOneOf...
[bg=False] Running UnnamedSometimes...
[bg=False] Running UnnamedWithColorspace...
[bg=False] Running UnnamedWithChannels...
[bg=False] Running Noop-nochange...
[bg=False] Running Lambda-nochange...
[bg=False] Running AssertLambda-nochange...
[bg=False] Running AssertShape-nochange...
[bg=False] Running UnnamedResize...
[bg=False] Running UnnamedCropAndPad...
[bg=False] Running UnnamedPad...
[bg=False] Running UnnamedCrop...
[bg=False] Running UnnamedFliplr...
[bg=False] Running UnnamedFlipud...
[bg=False] Running UnnamedSuperpixels...
[bg=False] Running UnnamedChangeColorspace...
[bg=False] Running UnnamedGrayscale...
[bg=False] Running UnnamedGaussianBlur...
[bg=False] Running UnnamedAverageBlur...
[bg=False] Running UnnamedMedianBlur...
[bg=False] Running UnnamedConvolve...
[bg=False] Running UnnamedSharpen...
[bg=False] Running UnnamedEmboss...
[bg=False] Running UnnamedEdgeDetect...
[bg=False] Running UnnamedDirectedEdgeDetect...
[bg=False] Running UnnamedAdd...
[bg=False] Running UnnamedAddElementwise...
[bg=False] Running UnnamedAdditiveGaussianNoise...
[bg=False] Running UnnamedMultiply...
[bg=False] Running UnnamedMultiplyElementwise...
[bg=False] Running UnnamedDropout...
[bg=False] Running UnnamedCoarseDropout...
[bg=False] Running UnnamedInvert...
[bg=False] Running UnnamedAffine...
[bg=False] Running UnnamedPiecewiseAffine...
[bg=False] Running UnnamedElasticTransformation...
[bg=True] Running UnnamedSequential...
[bg=True] Running UnnamedSomeOf...
[bg=True] Running UnnamedOneOf...
[bg=True] Running UnnamedSometimes...
[bg=True] Running UnnamedWithColorspace...
[bg=True] Running UnnamedWithChannels...
[bg=True] Running Noop-nochange...
[bg=True] Running Lambda-nochange...
[bg=True] Running AssertLambda-nochange...
[bg=True] Running AssertShape-nochange...
[bg=True] Running UnnamedResize...
[bg=True] Running UnnamedCropAndPad...
[bg=True] Running UnnamedPad...
[bg=True] Running UnnamedCrop...
[bg=True] Running UnnamedFliplr...
[bg=True] Running UnnamedFlipud...
[bg=True] Running UnnamedSuperpixels...
[bg=True] Running UnnamedChangeColorspace...
[bg=True] Running UnnamedGrayscale...
[bg=True] Running UnnamedGaussianBlur...