[doc]

tests/sync-reminder.rs

@@ -3,4 +3,5 @@
 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`
+    // See also the CI configuration in the `.gitlab` folder
 }