Update pytest from 3.4.0 to 3.4.1 (#3246)
Update pytest from 3.4.0 to 3.4.1 (#3246)


edmorley/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder,KWierso/treeherder,KWierso/treeherder,edmorley/treeherder