test: fix unit test and make test running serially. (#16525)#16612

Closed

sre-bot wants to merge 3 commits intopingcap:release-2.1from sre-bot:release-2.1-2a69052cf1fc

+13-4

Commits on Apr 20, 2020

Commits on Apr 29, 2020

Merge branch 'release-2.1' into release-2.1-2a69052cf1fc
wshwsh12
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