How to unit test Retrofit api calls?

If you use .execute() instead of .enqueue() it makes execution synchron, thus the tests can ran properly without the need of importing 3 different libraries and adding any code or modify the build variants.

Like:

public class LoginAPITest {

    @Test
    public void login_Success() {

        APIEndpoints apiEndpoints = RetrofitHelper.getTesterInstance().create(APIEndpoints.class);

        Call<AuthResponse> call = apiEndpoints.postLogin();

        try {
            //Magic is here at .execute() instead of .enqueue()
            Response<AuthResponse> response = call.execute();
            AuthResponse authResponse = response.body();

            assertTrue(response.isSuccessful() && authResponse.getBearer().startsWith("TestBearer"));

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}