Placeholder ticket for patches that do nothing but touching tests (a.k.a. "technical stories"). They have all been created with a user story in mind, but don't actually solve a story.
[x] Code coverage is good enough to make us feel comfortable doing estimations and making promises.
 Write some browser/integration test that test some of the more complicated stuff as listed on https://tools.wmflabs.org/wmde-reference-previews/core/index.php?title=Monkey_testing.
 ...scrolling / fade -> https://gerrit.wikimedia.org/r/498139
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