Update pytest from 3.9.2 to 3.9.3 (#3920)
Update pytest from 3.9.2 to 3.9.3 (#3920)


flodolo/testpilot,flodolo/testpilot,mozilla/idea-town,mozilla/idea-town,mozilla/idea-town,flodolo/testpilot,mozilla/idea-town-server,mozilla/idea-town-server,mozilla/idea-town-server,mozilla/idea-town-server,mozilla/idea-town,flodolo/testpilot