diff --git a/Accelerators/Vtkm/Testing/Cxx/TestVTKMGradient.cxx b/Accelerators/Vtkm/Testing/Cxx/TestVTKMGradient.cxx
index a1fa08f9713ae358c274b6b57adf82b196f3c136..cfcc15eb217a7684415567ff46b4d9e6627d2c6b 100644
--- a/Accelerators/Vtkm/Testing/Cxx/TestVTKMGradient.cxx
+++ b/Accelerators/Vtkm/Testing/Cxx/TestVTKMGradient.cxx
@@ -304,7 +304,7 @@ namespace
 } // end local namespace
 
 //-----------------------------------------------------------------------------
-int TestVTKMGradient(int argc, char *argv[])
+int TestVTKMGradient(int /* argc */, char * /* argv */ [])
 {
   vtkDataSet* grid = nullptr;