diff --git a/test/Index/index-refs.m b/test/Index/index-refs.m
new file mode 100644
index 0000000..b82345f
--- /dev/null
+++ b/test/Index/index-refs.m
@@ -0,0 +1,18 @@
+
+@class Protocol;
+
+@protocol Prot
+@end
+
+struct FooS {
+  int x;
+};
+
+void foo() {
+  Protocol *p = @protocol(Prot);
+  @encode(struct FooS);
+}
+
+// RUN: c-index-test -index-file %s | FileCheck %s
+// CHECK: [indexEntityReference]: kind: objc-protocol | name: Prot | {{.*}} | loc: 12:27
+// CHECK: [indexEntityReference]: kind: struct | name: FooS | {{.*}} | loc: 13:18