diff --git a/test/test_partition.py b/test/test_partition.py
index 8dd2399773d471d7b7c578601df49c148ff495fe..8ff25caa8e4a80c14c927a851de70d14d98c576a 100644
--- a/test/test_partition.py
+++ b/test/test_partition.py
@@ -535,7 +535,9 @@ def test_mpi_communication(num_partitions, order):
         "mpiexec", "-np", str(num_ranks),
         "-x", "RUN_WITHIN_MPI=1",
         "-x", "order=%d" % order,
-        sys.executable, __file__],
+
+        # https://mpi4py.readthedocs.io/en/stable/mpi4py.run.html
+        sys.executable, "-m", "mpi4py.run", __file__],
         )
 
 # }}}