diff --git a/src/tools/tidy/src/issues.txt b/src/tools/tidy/src/issues.txt
index 112a0519016a..f382502c7068 100644
--- a/src/tools/tidy/src/issues.txt
+++ b/src/tools/tidy/src/issues.txt
@@ -1475,7 +1475,6 @@ ui/lint/issue-97094.rs
 ui/lint/issue-99387.rs
 ui/lint/let_underscore/issue-119696-err-on-fn.rs
 ui/lint/let_underscore/issue-119697-extra-let.rs
-ui/lint/must_not_suspend/issue-89562.rs
 ui/lint/unused/issue-103320-must-use-ops.rs
 ui/lint/unused/issue-104397.rs
 ui/lint/unused/issue-105061-array-lint.rs
diff --git a/tests/ui/lint/must_not_suspend/issue-89562.rs b/tests/ui/lint/must_not_suspend/mutex-guard-dropped-before-await.rs
similarity index 67%
rename from tests/ui/lint/must_not_suspend/issue-89562.rs
rename to tests/ui/lint/must_not_suspend/mutex-guard-dropped-before-await.rs
index 99a548130720..d1c48c3c5145 100644
--- a/tests/ui/lint/must_not_suspend/issue-89562.rs
+++ b/tests/ui/lint/must_not_suspend/mutex-guard-dropped-before-await.rs
@@ -1,9 +1,13 @@
+//! Regression test for <https://github.com/rust-lang/rust/issues/89562>
+
 //@ edition:2018
 //@ run-pass
 
+#![feature(must_not_suspend)]
+#![deny(must_not_suspend)]
+
 use std::sync::Mutex;
 
-// Copied from the issue. Allow-by-default for now, so run-pass
 pub async fn foo() {
     let foo = Mutex::new(1);
     let lock = foo.lock().unwrap();