Test is not exclude using EnabledOnOs/DisabledOnOs tag using Junit 5, Java 11

I am playing around with Junit 5 (conditional skip) and jdk-11.01 to ignore some tests for the first time. I do not manage to get the @Disable/@Enable to disable testcases. Please share any ideas how to get this to work?

Example:

@DisabledOnOs(OS.LINUX)
@EnableOnOs(OS.WINDOWS)
@DisabledForJreRange

https://www.baeldung.com/junit-5-conditional-test-execution

The only exclusion that still works are the @Ignore flag.

I have tested to run a test suite from "GitHub Actions" or locally from IntelliJ with the Junit 5 plugin, and the tests are still executed even though the condition is met (example running a test on Linux machine) when test is marked @EnableOnOs(OS.WINDOWS)!

Example test:

import org.junit.jupiter.api.condition.EnabledOnOs;
import org.junit.jupiter.api.condition.OS;
...
@EnabledOnOs(OS.WINDOWS)
@Test
public void onlyRunOnWindowsTest() {
    log.info("Test run on Windows env. only");
    // more test code ...
}

Is there anything else I need to configure the test with in order to have this working?

I also have this:

from dependencis in gradle.build I have: // https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api testCompile group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.7.0'

in project External Libraries (intelliJ) I have:

> Gradle:junit:junit:4.1

I tried to remove this junit 4.1 (if there were due to conflict reasons), from project but this popped up again directly from a Gradle refresh. I guess junit5 uses this jar.

> Gradle:org.junit.jupiter:junit-jupiter-api:5.7.0