diff --git a/tests/by-util/test_tr.rs b/tests/by-util/test_tr.rs
index a035faae7..29712b44a 100644
--- a/tests/by-util/test_tr.rs
+++ b/tests/by-util/test_tr.rs
@@ -95,15 +95,18 @@ fn test_complement4() {
         .pipe_in("0x1y2z3")
         .run()
         .stdout_is("0~1~2~3");
+}
 
-    // TODO: fix this
+#[test]
+#[ignore = "fixme: GNU tr returns '0a1b2c3' instead of '0~1~2~3', see #2158"]
+fn test_complement5() {
     // $ echo '0x1y2z3' | tr -c '\0-@' '*-~'
     // 0a1b2c3
-    // new_ucmd!()
-    //     .args(&["-c", "\\0-@", "*-~"])
-    //     .pipe_in("0x1y2z3")
-    //     .run()
-    //     .stdout_is("0a1b2c3");
+    new_ucmd!()
+        .args(&["-c", "\\0-@", "*-~"])
+        .pipe_in("0x1y2z3")
+        .run()
+        .stdout_is("0a1b2c3");
 }
 
 #[test]