diff --git a/test/re/re.submatch/re.submatch.op/compare.pass.cpp b/test/re/re.submatch/re.submatch.op/compare.pass.cpp
index 3a500d37..4fe317ac 100644
--- a/test/re/re.submatch/re.submatch.op/compare.pass.cpp
+++ b/test/re/re.submatch/re.submatch.op/compare.pass.cpp
@@ -282,6 +282,6 @@ int main()
     test(std::string("1234"), std::string("123"));
     test(std::wstring(L"123"), std::wstring(L"123"));
     test(std::wstring(L"1234"), std::wstring(L"123"));
-    test(std::string("123\056", 6), std::string("123\056", 6), false);
-    test(std::wstring(L"123\056", 6), std::wstring(L"123\056", 6), false);
+    test(std::string("1234\00056", 6), std::string("123\056", 6), false);
+    test(std::wstring(L"123\00056", 6), std::wstring(L"123\056", 6), false);
 }