diff --git a/basic_test.go b/basic_test.go
index aaad88a..49cc4d7 100644
--- a/basic_test.go
+++ b/basic_test.go
@@ -318,6 +318,11 @@ func TestCloseBlocking(t *testing.T) {
 	sub.Close() // cancel sub
 }
 
+func panicOnTimeout(d time.Duration) {
+	<-time.After(d)
+	panic("timeout reached")
+}
+
 func TestSubFailFully(t *testing.T) {
 	bus := NewBus()
 	em, err := bus.Emitter(new(EventB))
@@ -330,6 +335,8 @@ func TestSubFailFully(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	go panicOnTimeout(5 * time.Second)
+
 	em.Emit(EventB(159)) // will hang if sub doesn't fail properly
 }