Integration tests using a test MySQL database

I am trying to start a fake play application to do some integration tests of a users repository. The fake application should have the additional configuration to point to a test database, that will be cleared after the tests. This is my code, that tries to insert a new user into the test database:

class MyTest extends WithApplication {

  @Override
  def provideApplication(): FakeApplication = {
    FakeApplication(
      additionalConfiguration = Map(
        "db.default.driver" -> "com.mysql.jdbc.Driver",
        "db.default.url" -> "jdbc:mysql://localhost/playit_test",
        "db.default.user" -> "root",
        "db.default.password" -> ""
      )
    )
  }

  @Test
  def myTest(): Unit = {
    val user: User = new User()
    user.setName("Test")
    UsersRepository.insert(user)
  }
}

The fake application should be provided by WithApplication, but when I run the test I get the following error:

Connected to the target VM, address: '127.0.0.1:57138', transport: 'socket'
[info] - application - Creating Pool for datasource 'default'
[info] - play.api.libs.concurrent.ActorSystemProvider - Starting application default Akka system: application

java.lang.RuntimeException: There is no started application
    ... Stack trace

Disconnected from the target VM, address: '127.0.0.1:57138', transport: 'socket'

The exception is thrown exactly in this line DB.withConnection { implicit c =>. It seems this code does not see the running fake application. Am I doing something wrong or is there other way to do it?