After merging https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/758458 in the context of T264460: Enable users to open the first suggested article directly from the mobile task preview links for task cards in the SuggestedEditsModule and PostEditPanel (small task card) didn't have a newcomer task token to be added to impressions data.
Our testing setup currently doesn't catch regressions where client-side or server-side code omits important analytics parameters from the newcomer task card. Let's add some tests to guard against regressions.