diff --git a/tests/cases/fourslash/jsDocGenerics1.ts b/tests/cases/fourslash/jsDocGenerics1.ts
index 3b5742af8b1..61358e3f490 100644
--- a/tests/cases/fourslash/jsDocGenerics1.ts
+++ b/tests/cases/fourslash/jsDocGenerics1.ts
@@ -1,10 +1,34 @@
 ///<reference path="fourslash.ts" />
 
 // @allowNonTsExtensions: true
+// @Filename: ref.d.ts
+//// namespace Thing {
+////     export interface Thung {
+////         a: number;
+////     ]
+//// ]
+
+
 // @Filename: Foo.js
+////
 //// /** @type {Array<number>} */
 //// var v;
-//// v[0]./**/
+//// v[0]./*1*/
+////
+//// /** @type {{x: Array<Array<number>>}} */
+//// var w;
+//// w.x[0][0]./*2*/
+////
+//// /** @type {Array<Thing.Thung>} */
+//// var x;
+//// x[0].a./*3*/
 
-goTo.marker();
+
+goTo.marker('1');
+verify.memberListContains("toFixed", /*displayText:*/ undefined, /*documentation*/ undefined, "method");
+
+goTo.marker('2');
+verify.memberListContains("toFixed", /*displayText:*/ undefined, /*documentation*/ undefined, "method");
+
+goTo.marker('3');
 verify.memberListContains("toFixed", /*displayText:*/ undefined, /*documentation*/ undefined, "method");