diff --git a/.github/actions/acc_test/action.yaml b/.github/actions/acc_test/action.yaml
index ee48e8c3..d551e474 100644
--- a/.github/actions/acc_test/action.yaml
+++ b/.github/actions/acc_test/action.yaml
@@ -132,7 +132,7 @@ runs:
         set -e
           if [ ! -f "${{ inputs.service_account_json_file_path }}" ]; then
             echo "unable to find service account file '${{ inputs.service_account_json_file_path }}'"
-            if [[ "x${{ inputs.service_account_json_content }}" == "x" ]]; then
+            if [ "x${{ inputs.service_account_json_content }}" == "x" ]; then
               echo "ERROR: service_account_json_file_content MUST NOT be empty if account file is missing"
               exit 1
             fi