Fail test after 300 seconds #325

Job	Run time
deploy	23s
test (3.9, mypy)	46s
test (3.9, lint)	56s
test (3.9, lint_docs)	1m 42s
test (3.12, unit-quick)	4m 35s
test (3.9, unit-quick)	4m 33s
test (3.12, lint)	51s
test (3.9, unit-diagnostic-nonredundant-noclientbuild-noshed-gx-dev)	1h 8m 27s
test (3.12, mypy)	49s
	1h 23m 2s

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