1 files changed, 15 insertions, 0 deletions
diff --git a/src/input/encode.rs b/src/input/encode.rs
index 81454ddc..ea7949aa 100644
--- a/src/input/encode.rs
+++ b/src/input/encode.rs
@@ -524,6 +524,12 @@ mod tests {
     }
 
     #[test]
+    fn legacy_alt_backspace_sends_escape_delete() {
+        let key = KeyEvent::new(KeyCode::Backspace, KeyModifiers::ALT);
+        assert_eq!(encode_key(key, KeyboardProtocol::Legacy), b"\x1b\x7f");
+    }
+
+    #[test]
     fn application_cursor_keys_use_ss3_sequences() {
         assert_eq!(encode_cursor_key(KeyCode::Up, true), b"\x1bOA");
         assert_eq!(encode_cursor_key(KeyCode::Down, true), b"\x1bOB");
@@ -639,6 +645,15 @@ mod tests {
     }
 
     #[test]
+    fn kitty_alt_backspace_uses_csi_u() {
+        let key = KeyEvent::new(KeyCode::Backspace, KeyModifiers::ALT);
+        assert_eq!(
+            encode_key(key, KeyboardProtocol::Kitty { flags: 1 }),
+            b"\x1b[127;3u"
+        );
+    }
+
+    #[test]
     fn kitty_plain_ctrl_c_uses_csi_u() {
         let key = KeyEvent::new(KeyCode::Char('c'), KeyModifiers::CONTROL);
         assert_eq!(