diff --git a/.github/workflows/UnitTests.yml b/.github/workflows/UnitTests.yml
index 914660c1e..8c754cc9e 100644
--- a/.github/workflows/UnitTests.yml
+++ b/.github/workflows/UnitTests.yml
@@ -503,10 +503,19 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set MPITRAMPOLINE_MPIEXEC
-      run: echo "MPITRAMPOLINE_MPIEXEC=$(which mpiexec)" >> "${GITHUB_ENV}"
+      run: |
+        export MPITRAMPOLINE_MPIEXEC=$(which mpiexec)
+        echo "MPITRAMPOLINE_MPIEXEC=$(which mpiexec)" >> "${GITHUB_ENV}"
+        echo ${MPITRAMPOLINE_MPIEXEC}
+        echo $(realpath ${MPITRAMPOLINE_MPIEXEC})
+        ${MPITRAMPOLINE_MPIEXEC} --version
 
     - name: Build MPIwrapper
       run: |
+        echo ${MPITRAMPOLINE_MPIEXEC}
+        echo $(realpath ${MPITRAMPOLINE_MPIEXEC})
+        ${MPITRAMPOLINE_MPIEXEC} --version
+
         apt-get update
         apt-get install -y wget cmake gcc g++ gfortran python3
         wget https://github.com/eschnett/MPIwrapper/archive/refs/tags/v${MPIWrapper}.tar.gz