6.14 dispatchAfterResponse not working in tests

[Jigsaw5279]

• Laravel Version: 6.14.0
• PHP Version: 7.3.10
• Database Driver & Version: Irrelevant

Description:

This issue is related to PR #31300, more specifically testing the feature.

I can't use the BusFake to assert that the job was actually dispatched.

Steps To Reproduce:

Given the following Controller Snippet:

public function store() {
  // ...
  DispatchableJob::dispatchAfterResponse();
  // ...
}

with the following test

    /** @test */
    public function dispatches_a_job() {
        $this->withoutExceptionHandling();
         \Bus::fake();

        $this->postJson(route('some.route'));;

        \Bus::assertDispatched(DispatchableJob::class);
    }

I get the following Exception:
Symfony\Component\Debug\Exception\FatalThrowableError : Call to undefined method Illuminate\Support\Testing\Fakes\BusFake::dispatchAfterResponse()

Maybe I'm doing things wrong, but I think the BusFake should support testing this feature?