diff --git a/library/std/src/process.rs b/library/std/src/process.rs
index 6414a235698b8..20ea03d36eb0e 100644
--- a/library/std/src/process.rs
+++ b/library/std/src/process.rs
@@ -2206,6 +2206,7 @@ impl crate::error::Error for ExitStatusError {}
 /// ```
 #[derive(Clone, Copy, Debug, PartialEq)]
 #[stable(feature = "process_exitcode", since = "1.61.0")]
+#[must_use]
 pub struct ExitCode(imp::ExitCode);
 
 #[stable(feature = "process_exitcode", since = "1.61.0")]
diff --git a/tests/ui/attributes/reexport-test-harness-entry-point.rs b/tests/ui/attributes/reexport-test-harness-entry-point.rs
index 4de308dafe4a7..ca942e90b04d4 100644
--- a/tests/ui/attributes/reexport-test-harness-entry-point.rs
+++ b/tests/ui/attributes/reexport-test-harness-entry-point.rs
@@ -11,5 +11,5 @@
 fn _unused() {
     // should resolve to the entry point function the --test harness
     // creates.
-    test_main();
+    let _ = test_main();
 }