diff --git a/.github/workflows/regression_test-numba_cpu_mpi.yml b/.github/workflows/regression_test-numba_cpu_mpi.yml
index 1ea1f2d3..bdb8477c 100644
--- a/.github/workflows/regression_test-numba_cpu_mpi.yml
+++ b/.github/workflows/regression_test-numba_cpu_mpi.yml
@@ -27,8 +27,11 @@ jobs:
     - name: Patch Numba
       run : |
         bash .github/workflows/patch.sh
+        lscpu
+        mpiexec -n 2 python -m mpi4py.bench helloworld
+        mpiexec -n 4 python -m mpi4py.bench helloworld
+
     - name: Regression Test - Numba and MPI
       run: |
           cd test/regression
-          mpiexec -n 4 python -m mpi4py.bench helloworld
           python run.py --mode=numba --mpiexec=4
diff --git a/.github/workflows/regression_test-python_mpi.yml b/.github/workflows/regression_test-python_mpi.yml
index f173c7f2..13590764 100644
--- a/.github/workflows/regression_test-python_mpi.yml
+++ b/.github/workflows/regression_test-python_mpi.yml
@@ -27,6 +27,9 @@ jobs:
     - name: Patch Numba
       run : |
         bash .github/workflows/patch.sh
+        lscpu
+        mpiexec -n 2 python -m mpi4py.bench helloworld
+        mpiexec -n 4 python -m mpi4py.bench helloworld
     - name: Regression Test - MPI
       run: |
         cd test/regression