partialMock of RateLimiter-Facade does not seem to set the cache property

See Github issue #48248 for all information

Hi all! When writing tests for a rate-limited endpoint I am trying to partially mock the RateLimiter facade to return a constant value for the availableIn call:

public function testRateLimitsAfterCertainAmountOfBadRequests(): void {
        RateLimiter::partialMock()
            ->shouldReceive('availableIn')
            ->once()
            ->andReturn(60);

        // ...
}

When executing the test the following error occurrs:

Error: Call to a member function get() on null in C:\Users\matth\Projects\SecureDAV\vendor\laravel\framework\src\Illuminate\Cache\RateLimiter.php:143

Which corresponds to the following line inside of the RateLimiter class (attempts-function):

return $this->cache->get($key, 0);

To me it seems like using the partial mock, does not initialize the class correctly and therefore does not set the cache property.

Am I doing something wrong here or is this an actual bug? Thanks!

(Steps to reproduce in the linked Issue)