diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index cf7af97dc7a4..13d57f784e79 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -1083,7 +1083,7 @@ fn get_concurrency() -> usize {
 
     #[cfg(target_os = "haiku")]
     fn num_cpus() -> usize {
-        // TODO: implement
+        // FIXME: implement
         1
     }
 }