// Each creates 2 indices (backup + rebuild) = 4 creates
        assertEquals("Only fess_config indices should be rebuilt", 4, testClient.createdIndices.size());
        // Verify no user/log indices were touched
        for (final String index : testClient.createdIndices) {
            assertFalse(index.contains("fess_user"), "fess_user should not be rebuilt");