Fix for clarification of output stream sources #360

Job	Run time
build-client / build-client	11m 56s
setup-selenium / setup_chromedriver	7s
Test (3.8, 0)	42m 32s
Test (3.8, 1)	52m 4s
Test (3.8, 2)	49m 6s
	2h 35m 45s

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