@Mholloway et al.: Do you happen to have a few links to occurrences of this test failure in our CI?

Here's one, I'll look for and edit to add after I'm out of my 2pm meeting:
https://integration.wikimedia.org/ci/job/apps-android-wikipedia-test/941/

That's great. Thanks!

I think one is good enough for now.

Change 259048 had a related patch set uploaded (by BearND):
Make EditTaskTest more reliable

https://gerrit.wikimedia.org/r/259048

Change 259048 merged by jenkins-bot:
Make EditTaskTest more reliable

https://gerrit.wikimedia.org/r/259048

I'm sorry to say I just got another instance of the same EditTaskTest failure while running tests locally:

org.wikipedia.test.EditTaskTest > testEdit[Nexus 6P - 6.0.1] FAILED
java.lang.AssertionError:
Expected: is not "== Section 2 ==\n\nEditing section INSERT RANDOM & HERE test at 1450367303829"
Tests on Nexus 6P - 6.0.1 failed: Instrumentation run failed due to 'Process crashed.'
:app:connectedDevDebugAndroidTest FAILED

FAILURE: Build failed with an exception.

• What went wrong:

Execution failed for task ':app:connectedDevDebugAndroidTest'.

There were failing tests. See the report at: file:///Users/loaner494/wikipedia/app/build/reports/androidTests/connected/flavors/DEV/index.html

• Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 1 mins 52.99 secs