diff --git a/test/Sema/undef-superclass-1.m b/test/Sema/undef-superclass-1.m
new file mode 100644
index 0000000..0b5b7c1
--- /dev/null
+++ b/test/Sema/undef-superclass-1.m
@@ -0,0 +1,18 @@
+@class SUPER, Y;
+
+@interface INTF :SUPER  // expected-error {{cannot find interface declaration for 'SUPER', superclass of 'INTF'}}
+@end
+
+@interface SUPER @end
+
+@interface INTF1 : SUPER
+@end
+
+@interface INTF2 : INTF1
+@end
+
+@interface INTF3 : Y // expected-error {{cannot find interface declaration for 'Y', superclass of 'INTF3'}}
+@end
+
+@interface INTF1  // expected-error {{duplicate interface declaration for class 'INTF1'}}
+@end