diff --git a/compiler/rustc_error_codes/src/error_codes.rs b/compiler/rustc_error_codes/src/error_codes.rs
index d507293ccb0d7..06a1995a0e1bf 100644
--- a/compiler/rustc_error_codes/src/error_codes.rs
+++ b/compiler/rustc_error_codes/src/error_codes.rs
@@ -643,5 +643,5 @@ E0788: include_str!("./error_codes/E0788.md"),
     E0717, // rustc_promotable without stability attribute, internal error code
 //  E0721, // `await` keyword
 //  E0723, // unstable feature in `const` context
-//  E0738, // Removed; errored on `#[track_caller] fn`s in `extern "Rust" { ... }`.
+//  E0738, // Removed; errored on `#[track_caller] fn`s in `extern "Rust" { ... }`. Testing
 }
diff --git a/src/tools/cargo b/src/tools/cargo
index a5e08c4703f20..dbff32b27893b 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit a5e08c4703f202e30cdaf80ca3e7c00baa59c496
+Subproject commit dbff32b27893b899ae2397f3d56d1be111041d56
diff --git a/src/tools/rustfmt/src/lib.rs b/src/tools/rustfmt/src/lib.rs
index 1d1ef525f23fa..9353d600a32f8 100644
--- a/src/tools/rustfmt/src/lib.rs
+++ b/src/tools/rustfmt/src/lib.rs
@@ -656,3 +656,5 @@ false,
         assert!(test_format_inner(format_code_block, code_block, expected));
     }
 }
+
+// Test rustfmt change.