Hi, I’m trying to re-implement my plugin tests using junit5/TestApplication, 2025.2 platform. I have removed all old tests, updated the dependencies and added a single test. The test itself runs but the “test run” complains about the Project not getting disposed: java.lang.AssertionError: Found a …

That message should also print existing strong paths to the leaked instance. If that path doesn’t contain anything from your plugin, it’s either a bug in the platform or you’re using it in the wrong way. I lack the necessary expertise to tell which is this, but I have one question: do you really ne…

If I’m not mistaken, LightJavaCodeInsightFixtureTestCase5 is to ease moving from JUnit4 to JUnit5, but it’s not using the annotations also introduced for JUnit5 support. See intellij-community/platform/testFramework/junit5/test/showcase at master · JetBrains/intellij-community · GitHub how to use a…

Thanks for the tip. :slight_smile: I tried that first and didn’t get it running. :frowning: Not sure, I think I didn’t find an example that uses test data files and `@TestDataPath` didn’t work for me. Maybe I try that again…

Found a leaked instance of class com.intellij.openapi.project.impl.ProjectImpl

IntelliJ Platform

martin.hauner (Martin Hauner) November 17, 2025, 8:05am 3

after removing @TestApplication it just works…

what is the rule for @TestApplication ? Where can/should I use it?

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Found a leaked instance of class com.intellij.openapi.project.impl.ProjectImpl

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