In the sheet above I used document_start and document_end on an anyway failing test. I ran these days some test with document_start and document_end to see the difference and I noticed that document_start increase the failure occurence. Unfortunately I didn't note this, but I am curious to run as comparison on a passing test those 2 to see if document_start is that risky I tend to believe. Will try to do that tomorrow and come back with the results.
Bug 1536758 Comment 15 Edit History
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In the sheet above I used document_start and document_end on an anyway failing test so we can't really see its real effect on that (ralking about "60s Timeout 30s Startup Delay run_at document_start" and "60s Timeout 30s Startup Delay run_at document_end"). I ran these days some other test with document_start and document_end to see the difference and I noticed that document_start increase the failure occurence. Unfortunately I didn't note this, but I am curious to run those 2 in comparison on a passing test to see if document_start is that risky I tend to believe. Will try to do that tomorrow and come back with the results.