sbt and play test with #RunWith - intellij-idea

Question

I'm dealing with a problem working on a Play project and sbt.
The problem is:
I have tests, some of them are using PowerMockito, some of them aren't
For the tests using PowerMockito, I've added #RunWith(PowerMockRunner.class) at the beginning of the class.
For the tests not using, I've added nothing.
Here is an example for a test that uses PowerMockito
#RunWith(PowerMockRunner.class)
#PrepareForTest({SomeMockedClass.class})
public class SomeClassTest {
#Test
public void aTest() {
PowerMockito
.stub(PowerMockito.method(SomeMockedClass.class, "aMethod"))
.toReturn(something);
assertThat(someCall).isEqualTo(something);
}
}
Here is an example for a test that doesn't use PowerMockito
public class AnotherClassTest {
#Test
public void anotherTest(){
assertThat(something).isEqualTo(something);
}
}
And here is my build.sbt dep:
libraryDependencies ++= Seq(
cache,
...
// Testing
"org.easytesting" % "fest-assert" % "1.4" % "test",
"junit" % "junit" % "4.12" % "test",
"org.powermock" % "powermock-mockito-release-full" % "1.6.2" % "test",
"org.powermock" % "powermock-module-junit4-rule-agent" % "1.6.2" % "test",
"org.easymock" % "easymock" % "3.3.1" % "test",
"com.novocode" % "junit-interface" % "0.11" % "test"
)
Here is the problem:
When I run my tests from IntelliJ, it founds all tests and everything is ok
When I run my tests from activator (activator test), it does NOT found the tests with the #RunWith.
I've read some post about it, like the sbt version or something
(even https://github.com/sbt/jacoco4sbt/issues/15).
But the sbt version is : 0.13.8-M5 so it seems ok.
Play version is : 2.3.8
If you guys have any clue that'd be great.
Thanks