[minor]

tests/sync-reminder.rs

@@ -0,0 +1,6 @@
+#[test]
+#[ignore]
+fn do_not_forget_to_run_tests_with_specific_features() {
+    // This is just a reminder that there are tests that can be run only when cargo feature "integration_tests" is enabled.
+    // See `sync.rs`
+}