diff --git a/ci/rt.sh b/ci/rt.sh
index 1a39d0ea3..6c9e597a5 100755
--- a/ci/rt.sh
+++ b/ci/rt.sh
@@ -67,7 +67,7 @@ if [ $mac2 = hf ]; then # for HERA
  export machine=HERA
  export homedir=${homedir:-"/scratch2/NAGAPE/epic/UPP/test_suite"}
  export rundir=${rundir:-"/scratch1/NCEPDEV/stmp2/${USER}"}
- module use /scratch1/NCEPDEV/nems/role.epic/spack-stack/spack-stack-1.6.0/envs/unified-env-rocky8/install/modulefiles/Core
+ module use /scratch1/NCEPDEV/nems/role.epic/spack-stack/spack-stack-1.6.0/envs/upp-addon-env/install/modulefiles/Core
  module load stack-intel/2021.5.0
  module load stack-intel-oneapi-mpi/2021.5.1
  module load prod_util/2.1.1
@@ -75,7 +75,7 @@ elif [ $mac = O ] ; then
  export machine=ORION
  export homedir=${homedir:-"/work/noaa/epic/UPP"}
  export rundir=${rundir:-"/work2/noaa/stmp/$USER"}
- module use /work/noaa/epic/role-epic/spack-stack/orion/spack-stack-1.6.0/envs/unified-env/install/modulefiles/Core
+ module use /work/noaa/epic/role-epic/spack-stack/orion/spack-stack-1.6.0/envs/upp-addon-env/install/modulefiles/Core
  module load stack-intel/2022.0.2
  module load stack-intel-oneapi-mpi/2021.5.1
  module load prod_util/2.1.1
@@ -83,11 +83,11 @@ elif [ $mac3 = herc ] ; then
  export machine=HERCULES
  export homedir=${homedir:-"/work/noaa/epic/UPP"}
  export rundir=${rundir:-"/work2/noaa/stmp/$USER"}
- module use /work/noaa/epic/role-epic/spack-stack/hercules/spack-stack-1.6.0/envs/unified-env/install/modulefiles/Core
+ module use /work/noaa/epic/role-epic/spack-stack/hercules/spack-stack-1.6.0/envs/upp-addon-env/install/modulefiles/Core
  module load stack-intel/2021.9.0
  module load stack-intel-oneapi-mpi/2021.9.0
  module load prod_util/2.1.1
- module load stack-python/3.10.13
+ module load python/3.10.8
 fi
 
 #set working directory