diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b874853..cd041f8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,10 +25,10 @@ jobs:
   build-services:
     needs: [install-build]
     runs-on: ubuntu-latest
-    if: ${{ needs.install-build.outputs.job-strategy-matrix != '[]' }}
+    if: ${{ needs.install-build.outputs.job-strategy-matrix != '[""]' }}
     strategy:
       matrix:
-        service: ${{ needs.install-build.outputs.job-strategy-matrix }}
+        service: ${{ fromJson(needs.install-build.outputs.job-strategy-matrix) }}
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
diff --git a/gen-service-version.js b/gen-service-version.js
index 5bbd457..ef781ba 100644
--- a/gen-service-version.js
+++ b/gen-service-version.js
@@ -27,4 +27,4 @@ Object.entries(serviceVersions).forEach(([name, version]) => {
   }
 });
 
-console.log(`::set-output name=job-strategy-matrix::[${job_strategy_matrix.join(', ')}]`);
+console.log(`::set-output name=job-strategy-matrix::["${job_strategy_matrix.join('", "')}"]`);