diff --git a/helix-core/src/test.rs b/helix-core/src/test.rs
index 345d9e9c8..064ca8a38 100644
--- a/helix-core/src/test.rs
+++ b/helix-core/src/test.rs
@@ -45,6 +45,7 @@ pub fn print(s: &str) -> (String, Selection) {
             Some('[') => (true, ']'),
             Some('(') => (false, ')'),
             Some(ch) => {
+                left.push('#');
                 left.push(ch);
                 continue;
             }