Make mock timing test less sensitive to env

The test was failing in github actions.
This change moves a possible allocation in NewTimer() out of the window between the asyncCall starting and the timer elapsing. As the allocation would be before the timer is started this does not risk making the timer effectively 0ms.

mock/mock_test.go

@@ -817,12 +817,15 @@ func Test_Mock_Called_blocks(t *testing.T) {
 
 	ch := make(chan Arguments)
 
+	timer := time.NewTimer(1 * time.Millisecond)
+	defer timer.Stop()
+
 	go asyncCall(&mockedService.Mock, ch)
 
 	select {
 	case <-ch:
 		t.Fatal("should have waited")
-	case <-time.After(1 * time.Millisecond):
+	case <-timer.C:
 	}
 
 	returnArguments := <-ch