diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 3024ddd5..b355630e 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -53,6 +53,4 @@ jobs:
         cat timing.log
         python -m unittest tests/benchmark/test_results.py
       env:
-        OMPI_MCA_plm: 'isolated'
         OMPI_MCA_rmaps_base_oversubscribe: 'yes'
-        OMPI_MCA_btl_vader_single_copy_mechanism: 'none'