diff --git a/src/libcore/tests/char.rs b/src/libcore/tests/char.rs
index ab90763abf8d5..76f28d493ab94 100644
--- a/src/libcore/tests/char.rs
+++ b/src/libcore/tests/char.rs
@@ -186,6 +186,14 @@ fn test_escape_debug() {
     assert_eq!(string('\u{100000}'), "\\u{100000}"); // private use 2
 }
 
+#[test]
+fn test_debug() {
+    assert_eq!(format!("{:?}", 'a'), "'a'");                // ASCII character
+    assert_eq!(format!("{:?}", 'é'), "'é'");                // printable character
+    assert_eq!(format!("{:?}", '\u{301}'), "'\\u{301}'");   // combining character
+    assert_eq!(format!("{:?}", '\u{e000}'), "'\\u{e000}'"); // private use 1
+}
+
 #[test]
 fn test_escape_default() {
     fn string(c: char) -> String {