diff --git a/.github/workflows/ci-test-go.yml b/.github/workflows/ci-test-go.yml
index a013d1515d..679e554098 100644
--- a/.github/workflows/ci-test-go.yml
+++ b/.github/workflows/ci-test-go.yml
@@ -45,7 +45,7 @@ jobs:
       RYUK_RECONNECTION_TIMEOUT: "${{ inputs.project-directory == 'modules/compose' && '30s' || '10s' }}"
     strategy:
       matrix:
-        platform: ${{ inputs.project-directory == 'modulegen' && '[ubuntu-latest, macos-latest, windows-latest]' || '[ubuntu-latest]' }}
+        platform: ${{ inputs.project-directory == 'modulegen' && fromJSON('ubuntu-latest', 'macos-latest', 'windows-latest]') || fromJSON('ubuntu-latest') }}
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Setup rootless Docker