diff --git a/lightning/src/ln/chanmon_update_fail_tests.rs b/lightning/src/ln/chanmon_update_fail_tests.rs
index 3fa2073d5ba..e492562d54d 100644
--- a/lightning/src/ln/chanmon_update_fail_tests.rs
+++ b/lightning/src/ln/chanmon_update_fail_tests.rs
@@ -4715,6 +4715,9 @@ fn test_single_channel_multiple_mpp() {
 				}
 				have_event = true;
 			}
+			if !have_event {
+				std::thread::yield_now();
+			}
 		}
 	});