diff --git a/src/sst/elements/ariel/tests/testMPI/ariel-reduce.py b/src/sst/elements/ariel/tests/testMPI/ariel-reduce.py
index 41a4796e60..356feb82b5 100644
--- a/src/sst/elements/ariel/tests/testMPI/ariel-reduce.py
+++ b/src/sst/elements/ariel/tests/testMPI/ariel-reduce.py
@@ -55,7 +55,7 @@
 
 if mpi_mode:
     core.addParams({
-        "mpilauncher": "./mpilauncher",
+        "mpimode" : 1,
         "mpiranks": mpiranks,
         "mpitracerank" : tracerank,
     })
diff --git a/src/sst/elements/ariel/tests/testMPI/demo1.py b/src/sst/elements/ariel/tests/testMPI/demo1.py
index 406349363c..e5d3871d63 100644
--- a/src/sst/elements/ariel/tests/testMPI/demo1.py
+++ b/src/sst/elements/ariel/tests/testMPI/demo1.py
@@ -39,7 +39,7 @@
 
 if mpi_mode:
     core.addParams({
-        "mpilauncher": "./mpilauncher",
+        "mpimode" : 1,
         "mpiranks": mpiranks,
         "mpitracerank" : 0,
     })