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Have you considered using Test Suits that should make such a configuration easier? https://blog.gradle.org/introducing-test-suites

What @Alex Semin said. 🙂 And if you did but don't want to use them, you don't put the main sourceset output onto the compile classpath and runtime classpath of the integ test sourceset: https://docs.gradle.org/current/userguide/java_testing.html#sec:configuring_java_integration_tests

Thx @Alex Semin - this is exactly what I need 🙂