diff --git a/crates/editor/src/display_map.rs b/crates/editor/src/display_map.rs
index ae2c4655a5..2bea851ec2 100644
--- a/crates/editor/src/display_map.rs
+++ b/crates/editor/src/display_map.rs
@@ -1081,10 +1081,7 @@ pub mod tests {
         );
         language.set_theme(&theme);
 
-        let (text, highlighted_ranges) = marked_text_ranges(
-            r#"const{} <a>: B = "c [d]""#,
-            vec![('{', '}'), ('<', '>'), ('[', ']')],
-        );
+        let (text, highlighted_ranges) = marked_text_ranges(r#"const[] [a]: B = "c [d]""#);
 
         let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
         buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
diff --git a/crates/util/src/test.rs b/crates/util/src/test.rs
index b4cf25274e..252383b347 100644
--- a/crates/util/src/test.rs
+++ b/crates/util/src/test.rs
@@ -77,22 +77,18 @@ pub fn marked_text(marked_text: &str) -> (String, Vec<usize>) {
     (unmarked_text, markers.remove(&'|').unwrap_or_else(Vec::new))
 }
 
-pub fn marked_text_ranges(
-    marked_text: &str,
-    range_markers: Vec<(char, char)>,
-) -> (String, Vec<Range<usize>>) {
-    let mut marker_chars = Vec::new();
-    for (start, end) in range_markers.iter() {
-        marker_chars.push(*start);
-        marker_chars.push(*end);
-    }
-    let (unmarked_text, markers) = marked_text_by(marked_text, marker_chars);
-    let ranges = range_markers
-        .iter()
-        .map(|(start_marker, end_marker)| {
-            let start = markers.get(start_marker).unwrap()[0];
-            let end = markers.get(end_marker).unwrap()[0];
-            start..end
+pub fn marked_text_ranges(marked_text: &str) -> (String, Vec<Range<usize>>) {
+    let (unmarked_text, mut markers) = marked_text_by(marked_text, vec!['[', ']']);
+    let opens = markers.remove(&'[').unwrap_or_default();
+    let closes = markers.remove(&']').unwrap_or_default();
+    assert_eq!(opens.len(), closes.len(), "marked ranges are unbalanced");
+
+    let ranges = opens
+        .into_iter()
+        .zip(closes)
+        .map(|(open, close)| {
+            assert!(close >= open, "marked ranges must be disjoint");
+            open..close
         })
         .collect();
     (unmarked_text, ranges)