Failing test is info.magnolia.eeintegrationtests.uitest.DiffUITest#changeStageAreaTitleThenPublishAndCompareToPreviousVersion
Apparently diff html is messed up when only one version exists and is compared to the current changes. One would expect the diffs to be in a span element under the existing h3 whereas they end up in a p. This is fixed as soon as two or more versions exist of the same page.
See also attached screenshot.

Is this an expected behaviour from the Diff module?