diff --git a/tests/Grid_cshift.cc b/tests/Grid_cshift.cc
index c0863965..fcee7b70 100644
--- a/tests/Grid_cshift.cc
+++ b/tests/Grid_cshift.cc
@@ -9,7 +9,7 @@ int main (int argc, char ** argv)
   Grid_init(&argc,&argv);
 
   std::vector<int> simd_layout({1,1,2,2});
-  std::vector<int> mpi_layout ({2,2,1,4});
+  std::vector<int> mpi_layout ({1,1,1,1});
   std::vector<int> latt_size  ({8,8,8,16});
     
   GridCartesian     Fine(latt_size,simd_layout,mpi_layout);