diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index 25d5de8f8..1962ac6ae 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -106,7 +106,7 @@ jobs:
           PROFILES_YML: ${{ secrets.CI_PROFILES_YML }}
         run: |
           mkdir -p ~/.dbt
-          UNDERSCORED_REF_NAME=$(echo "${{ env.BRANCH_NAME }}" | sed "s/-/_/g")
+          UNDERSCORED_REF_NAME=$(echo "${{ env.BRANCH_NAME }}" | head -c 32 | sed "s/-/_/g")
           echo "$PROFILES_YML" | base64 -d | sed "s/<SCHEMA_NAME>/py_$UNDERSCORED_REF_NAME/g" > ~/.dbt/profiles.yml
 
       - name: Setup Python