assertSame(tz1, tz2);
        assertSame(FessUserTimeZoneProcessProvider.centralTimeZone, tz1);
    }

    // Test with null RequestManager (edge case)
    @Test
    public void test_getRequestedTimeZone_withNullRequestManager() {
        // Execute with null request manager
        TimeZone result = provider.getRequestedTimeZone(null);

        // Should still return the central time zone
        assertNotNull(result);