diff --git a/packages/ml/test/ValidateParams/CMakeLists.txt b/packages/ml/test/ValidateParams/CMakeLists.txt
index 97ad98f9cbd6..2f451907e4b2 100644
--- a/packages/ml/test/ValidateParams/CMakeLists.txt
+++ b/packages/ml/test/ValidateParams/CMakeLists.txt
@@ -9,8 +9,8 @@ IF(ML_ENABLE_AztecOO AND ML_ENABLE_Amesos)
     COMM serial mpi
     )
 
-  ASSERT_DEFINED(PYTHONINTERP_FOUND)
-  IF (PYTHONINTERP_FOUND)
+  ASSERT_DEFINED(Python3_EXECUTABLE)
+  IF (Python3_EXECUTABLE)
 
     TRIBITS_ADD_ADVANCED_TEST( ValidateParameters_compareTestOutput
       COMM serial mpi