Playwright · Senior · Question 22 of 77

How do you debug a failure that happens only in CI?

1Mark the test fixme because CI-only failures are not real
2Add console.log calls and push until the failure disappears
3Open the CI trace, reproduce in the CI Docker image, compare env

Show the answer

Correct answer: Open the CI trace, reproduce in the CI Docker image, compare env

Explanation

Traces show the page state at the failure. Running the same Docker image and worker count locally often reproduces timing issues.

Further reading

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