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kotlinlang

Ah, forgot to mention, tests are run using Gradle

This happens when IDEA for some reason do not understand that this test is manager by Gradle. Try:

- Refresh all Gradle projects
- Make sure that Gradle run configuration is created, not an IDEA JUnit. If it's not, then:
    - Remove that run configuration
    - Check "Setting -&gt; Build, Execution, Deployment -&gt; Gradle -&gt; Runner", tick "Delegate IDE build/run actions to gradle" and choose "Gradle Test Runner" in "Run tests using"
    - Restart IDEA
    - New configuration should be created as Gradle one now (which, hopefully, will fix the issue)

Ticking "Delegate IDE build/run actions to gradle" helped, thank you!