1 files changed, 4 insertions, 0 deletions
diff --git a/library/std/src/thread/tests.rs b/library/std/src/thread/tests.rs
index ae889f1e778..2117f5f93ce 100644
--- a/library/std/src/thread/tests.rs
+++ b/library/std/src/thread/tests.rs
@@ -287,6 +287,8 @@ fn test_park_unpark_called_other_thread() {
     for _ in 0..10 {
         let th = thread::current();
 
+        // Here we rely on `thread::spawn` (specifically the part that runs after spawning
+        // the thread) to not consume the parking token.
         let _guard = thread::spawn(move || {
             super::sleep(Duration::from_millis(50));
             th.unpark();
@@ -316,6 +318,8 @@ fn test_park_timeout_unpark_called_other_thread() {
     for _ in 0..10 {
         let th = thread::current();
 
+        // Here we rely on `thread::spawn` (specifically the part that runs after spawning
+        // the thread) to not consume the parking token.
         let _guard = thread::spawn(move || {
             super::sleep(Duration::from_millis(50));
             th.unpark();