Tests

Merge pull request #507 from IanMayo/improve-pubsub0guidance #106

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Run time

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Job	Run time
build (lts/Erbium)	1m 12s
build (lts/Fermium)	1m 11s
build (lts/Gallium)	1m 16s
build (lts/Hydrogen)	1m 14s
build (lts/Iron)	1m 9s
	6m 2s