diff --git a/zed/src/editor/buffer/rope.rs b/zed/src/editor/buffer/rope.rs
index 231aa59878bdedf5448e0e1c0ba8ef8ca9e921f1..3b85c04c7e479b3fa35b6a98ebaf4f0fba9ac29c 100644
--- a/zed/src/editor/buffer/rope.rs
+++ b/zed/src/editor/buffer/rope.rs
@@ -403,6 +403,14 @@ mod tests {
     use rand::prelude::*;
     use std::env;
 
+    #[test]
+    fn test_all_4_byte_chars() {
+        let mut rope = Rope::new();
+        let text = "🏀".repeat(256);
+        rope.push(&text);
+        assert_eq!(rope.text(), text);
+    }
+
     #[test]
     fn test_random() {
         let iterations = env::var("ITERATIONS")