diff --git a/test/fixedbugs/bug195.go b/test/fixedbugs/bug195.go
index 4d679e2f34..27bbbd354a 100644
--- a/test/fixedbugs/bug195.go
+++ b/test/fixedbugs/bug195.go
@@ -10,3 +10,18 @@ type I1 interface { I2 }	// ERROR "interface"
 type I2 int
 
 type I3 interface { int }	// ERROR "interface"
+
+type S struct {
+	x interface{ S }	// ERROR "interface"
+}
+type I4 interface {
+	I4	// ERROR "interface"
+}
+
+type I5 interface {
+	I6
+}
+
+type I6 interface {
+	I5	// ERROR "interface"
+}