Single file testing doesn't work correctly after migration to Jest 22

Do you want to request a feature or report a bug? a bug

What is the current behavior? Jest tries running test 2 times instead of 1

• 1st run is successful
• 2nd run fails with unmatched snapshot error if such test scenario exists

If the current behavior is a bug, please provide the steps to reproduce and either a repl.it demo through https://repl.it/languages/jest or a minimal repository on GitHub that we can yarn install and yarn test. https://github.com/aakula-edmunds/sampleJestIssue

What is the expected behavior? A test should be run only once.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system. https://github.com/aakula-edmunds/sampleJestIssue/tree/master/archetype/config/jest

[rickhanlonii]

Ah, I see! I can confirm this (introduced in 22.0.0)

When you run yarn test server/sample.test.jsx it runs both the client and server project configs for that single test file, even though the client config shouldn’t run based on the testMatch

Thanks for following up @adaniliuk!

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