diff --git a/crates/test_utils/src/minicore.rs b/crates/test_utils/src/minicore.rs
index eeadf2bee2..c37a0aa1ef 100644
--- a/crates/test_utils/src/minicore.rs
+++ b/crates/test_utils/src/minicore.rs
@@ -31,7 +31,7 @@
 //!     eq: sized
 //!     ord: eq, option
 //!     derive:
-//!     fmt:
+//!     fmt: result
 
 pub mod marker {
     // region:sized