diff --git a/playbooks/install-standard-docker.yml b/playbooks/install-standard-docker.yml
index 45768c6..84b5aaf 100644
--- a/playbooks/install-standard-docker.yml
+++ b/playbooks/install-standard-docker.yml
@@ -20,7 +20,7 @@
       file:
         path: "{{ docker_repo_file }}"
         state: absent
-      when: docker_installed.rc != 0 or "'signed-by=" not in lookup('file', docker_repo_file, errors='ignore')"
+      when: docker_installed.rc != 0 or "signed-by=" not in lookup("file", docker_repo_file, errors="ignore")
 
     - name: Ensure keyring directory exists
       file: