diff --git a/tests/cases/compiler/extendFromAny.ts b/tests/cases/compiler/extendFromAny.ts
new file mode 100644
index 00000000000..52ac544be36
--- /dev/null
+++ b/tests/cases/compiler/extendFromAny.ts
@@ -0,0 +1,11 @@
+declare var Base: any;
+class C extends Base {
+    known = 1;
+    static sknown = 2;
+}
+
+let c = new C();
+c.known.length; // error, 'real' has no 'length' property
+C.sknown.length; // error, 'sreal' has no 'length' property
+c.unknown.length; // ok, fake: any
+C.sunknown.length; // ok: sfake: any