diff --git a/.github/workflows/cobalt_ci.yml b/.github/workflows/cobalt_ci.yml
index 48b81b4..bb2dfc5 100644
--- a/.github/workflows/cobalt_ci.yml
+++ b/.github/workflows/cobalt_ci.yml
@@ -35,8 +35,9 @@ jobs:
       # Install wget and get data
       - name: Install wget and get data
         run: |
-          apt update
-          apt install -y wget
+          add-apt-repository ppa:remik-ziemlinski/nccmp
+          apt-get update
+          apt-get install -y wget nccmp
           cd /opt
           wget https://gfdl-med.s3.amazonaws.com/OceanBGC_dataset/1d_datasets.tar.gz
           tar -zxvf 1d_datasets.tar.gz
@@ -67,4 +68,5 @@ jobs:
           cd ../MOM6_OBGC_examples/exps/OM4.single_column.COBALT.p4
           # check 
           diff -q ref/ocean.stats ./ocean.stats > /dev/null || { echo "Error: ocean.stats are different. Exiting..."; exit 1; }
-          diff -q ref/MOM.res.nc ./RESTART/MOM.res.nc > /dev/null || { echo "Error: MOM.res.nc are different. Exiting..."; exit 1; }
+          #diff -q ref/MOM.res.nc ./RESTART/MOM.res.nc > /dev/null || { echo "Error: MOM.res.nc are different. Exiting..."; exit 1; }
+          nccmp -dfqS ref/MOM.res.nc ./RESTART/MOM.res.nc || { echo "Error: MOM.res.nc are different. Exiting..."; exit 1; }