diff --git a/doc/ci/yaml/README.md b/doc/ci/yaml/README.md
index dd3ba1283f8..a586b095ef5 100644
--- a/doc/ci/yaml/README.md
+++ b/doc/ci/yaml/README.md
@@ -1018,7 +1018,7 @@ A simple example:
 
 ```yaml
 job1:
-  coverage: /Code coverage: \d+\.\d+/
+  coverage: '/Code coverage: \d+\.\d+/'
 ```
 
 ## Git Strategy