diff --git a/tests/baselines/reference/nodeResolution6.js b/tests/baselines/reference/nodeResolution6.js
index 58a9b907250..196e8ae57cf 100644
--- a/tests/baselines/reference/nodeResolution6.js
+++ b/tests/baselines/reference/nodeResolution6.js
@@ -13,7 +13,5 @@ export declare var y;
 import y = require("a"); 
 
 
-//// [ref.js]
-var x = 1;
 //// [b.js]
 "use strict";
diff --git a/tests/baselines/reference/nodeResolution8.js b/tests/baselines/reference/nodeResolution8.js
index 36b53eec553..1d90399ff70 100644
--- a/tests/baselines/reference/nodeResolution8.js
+++ b/tests/baselines/reference/nodeResolution8.js
@@ -12,7 +12,5 @@ export declare var y;
 //// [b.ts]
 import y = require("a");
 
-//// [ref.js]
-var x = 1;
 //// [b.js]
 "use strict";
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
index 1958800f918..e4440299cc7 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
@@ -31,9 +31,6 @@ exports.x = 1;
 //// [file2.js]
 "use strict";
 exports.y = 1;
-//// [file4.js]
-"use strict";
-exports.z1 = 1;
 //// [file1.js]
 "use strict";
 var file1_1 = require("folder2/file1");
diff --git a/tests/cases/fourslash/importJsNodeModule3.ts b/tests/cases/fourslash/importJsNodeModule3.ts
index a48150a4218..b790d351a1f 100644
--- a/tests/cases/fourslash/importJsNodeModule3.ts
+++ b/tests/cases/fourslash/importJsNodeModule3.ts
@@ -10,7 +10,11 @@
 // @Filename: node_modules/anotherMod/index.js
 //// exports.x = 3;
 //// exports.y = 'foo';
-//// exports.z = true;
+//// /**
+////   * @param {(number | boolean)} a The first param
+////   * @param {Array<string>}      b The second param
+////   */
+//// exports.z = function(a,b){ return "test"; };
 
 // @Filename: consumer.js
 //// import * as x from 'myMod';
@@ -29,3 +33,6 @@ verify.completionListContains("toFixed", /*displayText:*/ undefined, /*documenta
 edit.backspace(4);
 edit.insert('y.');
 verify.completionListContains("toUpperCase", /*displayText:*/ undefined, /*documentation*/ undefined, "method");
+edit.backspace(2);
+edit.insert('z(');
+verify.currentSignatureHelpIs("z(a: number | boolean, b: string[]): string");
diff --git a/tests/cases/unittests/moduleResolution.ts b/tests/cases/unittests/moduleResolution.ts
index 1173f579f2c..b1caed2d62a 100644
--- a/tests/cases/unittests/moduleResolution.ts
+++ b/tests/cases/unittests/moduleResolution.ts
@@ -179,6 +179,9 @@ module ts {
                     "/a/b/foo.ts",
                     "/a/b/foo.tsx",
                     "/a/b/foo.d.ts",
+                    "/c/d.ts",
+                    "/c/d.tsx",
+                    "/c/d.d.ts",
                     "/a/b/foo/index.ts",
                     "/a/b/foo/index.tsx",
                 ]);