diff --git a/.github/workflows/test-actions.yaml b/.github/workflows/test-actions.yaml
index bbeae00..c2322eb 100644
--- a/.github/workflows/test-actions.yaml
+++ b/.github/workflows/test-actions.yaml
@@ -18,3 +18,13 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./gar-auth
+        with:
+          GCP_WORKLOAD_IDENTITY_PROVIDER: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+          GCP_SERVICE_ACCOUNT_EMAIL: ${{ vars.GCP_SERVICE_ACCOUNT_EMAIL }}
+          create_credentials_file: true
+
+      - uses: ./gar-auth
+        with:
+          GCP_WORKLOAD_IDENTITY_PROVIDER: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+          GCP_SERVICE_ACCOUNT_EMAIL: ${{ vars.GCP_SERVICE_ACCOUNT_EMAIL }}
+          create_credentials_file: false
diff --git a/gar-auth/action.yaml b/gar-auth/action.yaml
index 3fa1e27..270bc59 100644
--- a/gar-auth/action.yaml
+++ b/gar-auth/action.yaml
@@ -19,7 +19,7 @@ runs:
       name: "Authenticate to Google Cloud"
       uses: google-github-actions/auth@v1.1.1
       with:
-        create_credentials_file: ${{ inputs.create_credentials_file }}
+        create_credentials_file: ${{ inputs.create_credentials_file == 'true' }}
         token_format: "access_token"
         workload_identity_provider: ${{ inputs.GCP_WORKLOAD_IDENTITY_PROVIDER }}
         service_account: ${{ inputs.GCP_SERVICE_ACCOUNT_EMAIL }}