diff --git a/vtkm/testing/Testing.h b/vtkm/testing/Testing.h
index b6d023e5b..68869ae89 100644
--- a/vtkm/testing/Testing.h
+++ b/vtkm/testing/Testing.h
@@ -875,8 +875,8 @@ static inline VTKM_CONT void CheckPortal(const PortalType& portal)
     if (!test_equal(expectedValue, foundValue))
     {
       std::stringstream message;
-      message << "Got unexpected value in array." << std::endl
-              << "Expected: " << expectedValue << ", Found: " << foundValue << std::endl;
+      message << "Got unexpected value in array. Expected: " << expectedValue
+              << ", Found: " << foundValue << "\n";
       VTKM_TEST_FAIL(message.str().c_str());
     }
   }