DBFluteSystem.unlock();
            DBFluteSystem.setFinalTimeZoneProvider(originalProvider);
            DBFluteSystem.lock();
        }
        super.tearDown();
    }

    public void test_hook_setsTimeZoneProvider() {
        // Given
        FwAssistantDirector assistantDirector = null; // Not used in the implementation

        // When
        curtainBeforeHook.hook(assistantDirector);

        // Then