       ASSERT_EQUAL_QUIET(h2, d2);
   }
 };
-VariableUnitTest<TestZipIteratorStableSort, NumericTypes> TestZipIteratorStableSortInstance;
+VariableUnitTest<TestZipIteratorStableSort, SignedIntegralTypes> TestZipIteratorStableSortInstance;
 
 
 template <typename T>

      ASSERT_EQUAL_QUIET(h4, d4);
  }
};
VariableUnitTest<TestZipIteratorStableSortByKey, NumericTypes> TestZipIteratorStableSortByKeyInstance;


                                     make_tuple<T,T>(0,0),
                                     TuplePlus<Tuple>());

    ASSERT_EQUAL(get<0>(h_result), get<0>(d_result));
    ASSERT_EQUAL(get<1>(h_result), get<1>(d_result));
  }
};
VariableUnitTest<TestZipIteratorReduce, IntegralTypes> TestZipIteratorReduceInstance;


template <typename T>
