Intelij 2019.1 update breaks JUnit tests

Question

After 2019.1 update broke all tests with error:

no tests found for given includes xxxx.someThingTest

Answer 1

I experienced the same problem in 2019.2 for a newly developped class that was not detected. I strangely solved it by manually running "Build->Rebuild Project"

The workaround with Runner by Mike was not working for me.

Answer 2

Switching to JDK 11.0.2 solved this for me. Not sure if it is the real cause, though.

Answer 3

If you are using JUnit5 with Gradle, add below code to build.gradle file.

test {
    useJUnitPlatform()
}

I've got a hint from https://www.baeldung.com/junit-5-gradle

Answer 4

When using JUnit 5, make sure that you use the interfaces provided by org.junit.jupiter

So for instance, you should annotate your tests with org.junit.jupiter.api.Test instead of org.junit.Test

For JUnit 4, and prior, use the interfaces provided by org.junit

Answer 5

Intelij somehow changed setting with update.

Settings > Build,Execution,Deployment > Build Tools > Gradle > Runner > "Run tests using:"

Changed from "Gradle Test runner" to "Platform Test runner" and it worked. I hope this is useful in some matter.

Answer 6

Checkout this build.gradle file for using Junit5

https://github.com/junit-team/junit5-samples/blob/r5.4.0/junit5-jupiter-starter-gradle/build.gradle