diff --git a/test/interface/explicit.go b/test/interface/explicit.go
index 9b90cb7a5e..bd1bd19a96 100644
--- a/test/interface/explicit.go
+++ b/test/interface/explicit.go
@@ -37,5 +37,5 @@ func main() {
 	i2 = I2(i);	// ERROR "need explicit|need type assertion"
 
 	e = E(t);	// ok
-	t = T(e);	// ERROR "need explicit|need type assertion"
+	t = T(e);	// ERROR "need explicit|need type assertion|incompatible"
 }