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Jest 23 and react-scripts are conflicting

See original GitHub issue

Jest 23 when run with react-scripts in my project is throwing:

TypeError: environment.teardown is not a function
  at node_modules/jest-runner/build/run_test.js:188:25

When I remove with yarn remove jest I assume my tests are using the react-scripts version of Jest (locked at 22.4.3) and the tests run normally.

Locking my version with yarn add jest@22.4.3 --dev doesn’t solve this issue.

This issue is obviously related to something within react-scripts and perhaps should be opened on that project but I can’t figure out what is going on and at least by creating the issue, I might save someone else from the research time that I’ve spent trying to track it down.

Issue Analytics

State:
Created 5 years ago
Comments:8

Top GitHub Comments

6reactions

funkfingercommented, May 25, 2018

Sorry, I was incorrect. react-scripts is locked at 20.0.4 - when I lock my project to Jest 20.0.4, (yarn add jest@20.0.4 --dev) tests run as expected.

(I was accidentally looking at @next branch)

3reactions

joeynimucommented, Aug 29, 2018

I have got my tests running okay locally but when I run them on bitbucket pipeline I get this error;

    TypeError: environment.teardown is not a function
      at node_modules/jest-runner/build/run_test.js:230:25

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