diff --git a/src/doc/rustdoc/src/documentation-tests.md b/src/doc/rustdoc/src/documentation-tests.md
index eb5c53f899b..2941ae16a58 100644
--- a/src/doc/rustdoc/src/documentation-tests.md
+++ b/src/doc/rustdoc/src/documentation-tests.md
@@ -89,6 +89,7 @@ It will render like this:
 ```rust
 /// Some documentation.
 # fn foo() {}
+println!("Hello, World!");
 ```
 
 Yes, that's right: you can add lines that start with `# `, and they will