diff --git a/env/rhel7/x86_64/admin/testing/spack.yaml b/env/rhel7/x86_64/admin/testing/spack.yaml
index 6dc23ee..8a8b800 100644
--- a/env/rhel7/x86_64/admin/testing/spack.yaml
+++ b/env/rhel7/x86_64/admin/testing/spack.yaml
@@ -15,5 +15,5 @@ spack:
     local_testing: file:///afs/psi.ch/software/spack/testing
     local_unstable: file:///afs/psi.ch/software/spack/unstable
   specs:
-    - gcc@12.3.0
+  - opal@master%gcc@12.3.0 ^openmpi
   view: false
diff --git a/env/rhel7/x86_64/sysconfigs/packages.yaml b/env/rhel7/x86_64/sysconfigs/packages.yaml
index 84adf43..f97042d 100644
--- a/env/rhel7/x86_64/sysconfigs/packages.yaml
+++ b/env/rhel7/x86_64/sysconfigs/packages.yaml
@@ -142,7 +142,7 @@ packages:
     require: '%gcc'
   openmpi:
     require:
-      - schedulers=slurm fabrics=auto +pmi +cxx +cxx_exceptions +cuda +legacylaunchers
+      - schedulers=slurm fabrics=auto pmi-interface=pmi2 +cxx +cxx_exceptions +cuda +legacylaunchers
   openssh:
     require: '%gcc@4.8.5'
   openssl: