diff --git a/nodeunit/nodeunit-tests.ts b/nodeunit/nodeunit-tests.ts
index bdd705b0e3..e7cf5e73e9 100644
--- a/nodeunit/nodeunit-tests.ts
+++ b/nodeunit/nodeunit-tests.ts
@@ -14,10 +14,10 @@ var block: () =>{
 };
 
 export var testGroup: nodeunit.ITestGroup = {
-	setUp: function (callback: nodeunit.ICallbackFunction) {
+	setUp: (callback) => {
 		callback();
 	},
-	tearDown: function (callback: nodeunit.ICallbackFunction) {
+	tearDown: (callback) => {
 		callback();
 	},
 	test1: function (test: nodeunit.Test) {
@@ -55,5 +55,83 @@ export var testGroup: nodeunit.ITestGroup = {
 
 		test.done(error);
 		test.done();
+	},
+	"This is a test with a nice description": (test: nodeunit.Test) => {
+		test.done();
 	}
 };
+
+
+// see https://github.com/caolan/nodeunit/blob/master/examples/nested/nested_reporter_test.unit.js for example.
+// (https://github.com/caolan/nodeunit/commit/9fee91149324f79753eadbcf8993399a7d76da40)
+
+
+
+var testCase = nodeunit.testCase;
+
+export var testCaseGroup = testCase({
+    "Test 0.1": function(test: nodeunit.Test) {
+        test.ok(true);
+        test.done();
+    },
+
+    "TC 1": testCase({
+        "TC 1.1": testCase({
+            "Test 1.1.1": function(test: nodeunit.Test) {
+                test.ok(true);
+                test.done();
+            }
+        })
+    }),
+
+    "TC 2": testCase({
+        "TC 2.1": testCase({
+            "TC 2.1.1": testCase({
+                "Test 2.1.1.1": function(test: nodeunit.Test) {
+                    test.ok(true);
+                    test.done();
+                },
+
+                "Test 2.1.1.2": function(test: nodeunit.Test) {
+                    test.ok(true);
+                    test.done();
+                }
+            }),
+
+            "TC 2.2.1": testCase({
+                "Test 2.2.1.1": function(test: nodeunit.Test) {
+                    test.ok(true);
+                    test.done();
+                },
+
+                "TC 2.2.1.1": testCase({
+                    "Test 2.2.1.1.1": function(test: nodeunit.Test) {
+                        test.ok(true);
+                        test.done();
+                    },
+                }),
+
+                "Test 2.2.1.2": function(test: nodeunit.Test) {
+                    test.ok(true);
+                    test.done();
+                }
+            })
+        })
+    }),
+
+    "TC 3": testCase({
+        "TC 3.1": testCase({
+            "TC 3.1.1": testCase({
+                "Test 3.1.1.1 (should fail)": function(test: nodeunit.Test) {
+                    test.ok(false);
+                    test.done();
+                }
+            })
+        })
+    })
+});
+
+
+
+
+
diff --git a/nodeunit/nodeunit.d.ts b/nodeunit/nodeunit.d.ts
index c427dbf171..2775ee23c5 100644
--- a/nodeunit/nodeunit.d.ts
+++ b/nodeunit/nodeunit.d.ts
@@ -6,6 +6,11 @@
 // Imported from: https://github.com/soywiz/typescript-node-definitions/nodeunit.d.ts
 
 declare module 'nodeunit' {
+	export interface ITestCase {
+			(testCase: {[property: string]: ITestBody | ITestGroup | void}) : void;
+		}
+    export var testCase : ITestCase;
+
 	export interface Test {
 		done: ICallbackFunction;
 		expect(num: number): void;
@@ -31,15 +36,15 @@ declare module 'nodeunit' {
 
 	// Test Group Usage:
 	//  var testGroup: nodeunit.ITestGroup = {
-	//        setUp: function (callback: nodeunit.ICallbackFunction): void {
-	//            callback();
-	//        },
-	//        tearDown: function (callback: nodeunit.ICallbackFunction): void {
-	//            callback();
-	//        },
-	//        test1: function (test: nodeunit.Test): void {
-	//            test.done();
-	//        }
+	//      setUp: (callback) => {
+	// 	      callback();
+	//      },
+	//      tearDown: (callback) => {
+	// 	       callback();
+	//      },
+	//      test1: (test: nodeunit.Test) => {
+	//          test.done();
+	//      }
 	//    }
 	//    exports.testgroup = testGroup;
 
@@ -48,12 +53,14 @@ declare module 'nodeunit' {
 	}
 
 	export interface ITestGroup {
+		/** The setUp function is run before each test */
 		setUp?: (callback: ICallbackFunction) => void;
+		/** The tearDown function is run after each test calls test.done() */
 		tearDown?: (callback: ICallbackFunction) => void;
+		[property: string] : ITestGroup | ITestBody | ((callback: ICallbackFunction) => void);
 	}
 
 	export interface ICallbackFunction {
 		(err?: any): void;
 	}
 }
-