diff --git a/internal/src/pinned_drop.rs b/internal/src/pinned_drop.rs
index c824dd8b..c4ca7a70 100644
--- a/internal/src/pinned_drop.rs
+++ b/internal/src/pinned_drop.rs
@@ -28,8 +28,7 @@ pub(crate) fn pinned_drop(_args: TokenStream, input: TokenStream) -> TokenStream
             // Found the end of the generics, this should be `PinnedDrop`.
             assert!(
                 matches!(tt, TokenTree::Ident(i) if i.to_string() == "PinnedDrop"),
-                "expected 'PinnedDrop', found: '{:?}'",
-                tt
+                "expected 'PinnedDrop', found: '{tt:?}'"
             );
             pinned_drop_idx = Some(i);
             break;