Restore commented tests #547

Job	Run time
stable (ubuntu-latest)	1m 22s
stable (macos-latest)	1m 45s
stable (windows-latest)	2m 40s
loom	2m 45s
minrust	2m 57s
cross (i686-unknown-linux-gnu)	32s
miri	8m 1s
cross (armv7-unknown-linux-gnueabihf)	28s
nightly	3m 47s
rustfmt	2s
cross (powerpc-unknown-linux-gnu)	27s
tsan	3m 13s
cross (powerpc64-unknown-linux-gnu)	28s
cross (wasm32-unknown-unknown)	6s
Publish Documentation	2m 31s
	31m 4s

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