diff --git a/.github/workflows/model-build-test-ci.yml b/.github/workflows/model-build-test-ci.yml
index 06c6c55..f24a745 100644
--- a/.github/workflows/model-build-test-ci.yml
+++ b/.github/workflows/model-build-test-ci.yml
@@ -3,14 +3,18 @@ name: Test model build
 on:
   workflow_dispatch:
   pull_request:
-      branches:
-        - "master"
-        - "access-esm1.5"
+    branches:
+      - "master"
+      - "access-esm1.5"
   push:
-
+    branches:
+      - "master"
+      - "access-esm1.5"
 jobs:
   build:
     name: Build ${{ github.repository }} via spack
     uses: access-nri/build-ci/.github/workflows/model-1-build.yml@main
+    with:
+      rhs-branch: ${{ (github.base_ref == 'access-esm1.5' || github.ref_name == 'access-esm1.5') && 'access-esm1.5' }}
     permissions:
       packages: read