diff --git a/src/testing/synctest/synctest.go b/src/testing/synctest/synctest.go
index 60c3d033bb4ef7..5b6b9b2d0b4b46 100644
--- a/src/testing/synctest/synctest.go
+++ b/src/testing/synctest/synctest.go
@@ -96,7 +96,7 @@
 //
 // A channel, [time.Timer], or [time.Ticker] created within a bubble
 // is associated with it. Operating on a bubbled channel, timer, or
-// ticker from outside the bubble panics.
+// ticker from outside the bubble is a fatal error.
 //
 // A [sync.WaitGroup] becomes associated with a bubble on the first
 // call to Add or Go. Once a WaitGroup is associated with a bubble,