diff --git a/packages/animations/browser/test/dsl/animation_spec.ts b/packages/animations/browser/test/dsl/animation_spec.ts
index 084c8e8b95..b683604796 100644
--- a/packages/animations/browser/test/dsl/animation_spec.ts
+++ b/packages/animations/browser/test/dsl/animation_spec.ts
@@ -18,7 +18,7 @@ function createDiv() {
   return document.createElement('div');
 }
 
-export function main() {
+{
   describe('Animation', () => {
     // these tests are only mean't to be run within the DOM (for now)
     if (typeof Element == 'undefined') return;
diff --git a/packages/animations/browser/test/dsl/animation_trigger_spec.ts b/packages/animations/browser/test/dsl/animation_trigger_spec.ts
index 416c231317..74a517dec1 100644
--- a/packages/animations/browser/test/dsl/animation_trigger_spec.ts
+++ b/packages/animations/browser/test/dsl/animation_trigger_spec.ts
@@ -14,7 +14,7 @@ import {ENTER_CLASSNAME, LEAVE_CLASSNAME} from '../../src/util';
 import {MockAnimationDriver} from '../../testing';
 import {makeTrigger} from '../shared';
 
-export function main() {
+{
   describe('AnimationTrigger', () => {
     // these tests are only mean't to be run within the DOM (for now)
     if (typeof Element == 'undefined') return;
diff --git a/packages/animations/browser/test/dsl/style_normalizer/web_animations_style_normalizer_spec.ts b/packages/animations/browser/test/dsl/style_normalizer/web_animations_style_normalizer_spec.ts
index 37d80efb83..003df7678c 100644
--- a/packages/animations/browser/test/dsl/style_normalizer/web_animations_style_normalizer_spec.ts
+++ b/packages/animations/browser/test/dsl/style_normalizer/web_animations_style_normalizer_spec.ts
@@ -7,7 +7,7 @@
  */
 import {WebAnimationsStyleNormalizer} from '../../../src/dsl/style_normalization/web_animations_style_normalizer';
 
-export function main() {
+{
   describe('WebAnimationsStyleNormalizer', () => {
     const normalizer = new WebAnimationsStyleNormalizer();
 
diff --git a/packages/animations/browser/test/render/timeline_animation_engine_spec.ts b/packages/animations/browser/test/render/timeline_animation_engine_spec.ts
index 025045b01f..fccdd08215 100644
--- a/packages/animations/browser/test/render/timeline_animation_engine_spec.ts
+++ b/packages/animations/browser/test/render/timeline_animation_engine_spec.ts
@@ -12,7 +12,7 @@ import {AnimationDriver} from '../../src/render/animation_driver';
 import {TimelineAnimationEngine} from '../../src/render/timeline_animation_engine';
 import {MockAnimationDriver, MockAnimationPlayer} from '../../testing/src/mock_animation_driver';
 
-export function main() {
+(function(){
   const defaultDriver = new MockAnimationDriver();
 
   function makeEngine(driver?: AnimationDriver, normalizer?: AnimationStyleNormalizer) {
@@ -93,7 +93,7 @@ export function main() {
       expect(player.keyframes).toEqual([{width: '*star*', offset: 0}, {width: '999px', offset: 1}]);
     });
   });
-}
+})();
 
 function invokeAnimation(
     engine: TimelineAnimationEngine, element: any, steps: AnimationMetadata | AnimationMetadata[],
diff --git a/packages/animations/browser/test/render/transition_animation_engine_spec.ts b/packages/animations/browser/test/render/transition_animation_engine_spec.ts
index 0fb955b85d..5206a7f8d1 100644
--- a/packages/animations/browser/test/render/transition_animation_engine_spec.ts
+++ b/packages/animations/browser/test/render/transition_animation_engine_spec.ts
@@ -16,7 +16,7 @@ import {MockAnimationDriver, MockAnimationPlayer} from '../../testing/src/mock_a
 
 const DEFAULT_NAMESPACE_ID = 'id';
 
-export function main() {
+(function(){
   const driver = new MockAnimationDriver();
 
   // these tests are only mean't to be run within the DOM
@@ -616,7 +616,7 @@ export function main() {
       });
     });
   });
-}
+})();
 
 class SuffixNormalizer extends AnimationStyleNormalizer {
   constructor(private _suffix: string) { super(); }
diff --git a/packages/animations/browser/test/render/web_animations/web_animations_player_spec.ts b/packages/animations/browser/test/render/web_animations/web_animations_player_spec.ts
index 139aecfcf4..0d484c465b 100644
--- a/packages/animations/browser/test/render/web_animations/web_animations_player_spec.ts
+++ b/packages/animations/browser/test/render/web_animations/web_animations_player_spec.ts
@@ -8,7 +8,7 @@
 import {DOMAnimation} from '../../../src/render/web_animations/dom_animation';
 import {WebAnimationsPlayer} from '../../../src/render/web_animations/web_animations_player';
 
-export function main() {
+{
   let element: any;
   let innerPlayer: MockDomAnimation|null = null;
   beforeEach(() => {
diff --git a/packages/animations/test/animation_player_spec.ts b/packages/animations/test/animation_player_spec.ts
index ae74a7268d..7ad7152d60 100644
--- a/packages/animations/test/animation_player_spec.ts
+++ b/packages/animations/test/animation_player_spec.ts
@@ -10,7 +10,7 @@ import {flushMicrotasks} from '../../core/testing/src/fake_async';
 import {NoopAnimationPlayer} from '../src/players/animation_player';
 import {scheduleMicroTask} from '../src/util';
 
-export function main() {
+{
   describe('NoopAnimationPlayer', function() {
     it('should finish after the next microtask once started', fakeAsync(() => {
          const log: string[] = [];
diff --git a/packages/animations/test/util_spec.ts b/packages/animations/test/util_spec.ts
index f687d3da7b..dc5070a4c6 100644
--- a/packages/animations/test/util_spec.ts
+++ b/packages/animations/test/util_spec.ts
@@ -7,7 +7,7 @@
  */
 import {scheduleMicroTask} from '../src/util';
 
-export function main() {
+{
   describe('util', () => {
     it('should schedule a microtask and not call an async timeout', (done) => {
       let count = 0;
diff --git a/packages/benchpress/test/firefox_extension/parser_util_spec.ts b/packages/benchpress/test/firefox_extension/parser_util_spec.ts
index 782a04243e..1669d07036 100644
--- a/packages/benchpress/test/firefox_extension/parser_util_spec.ts
+++ b/packages/benchpress/test/firefox_extension/parser_util_spec.ts
@@ -19,7 +19,7 @@ function assertEventsEqual(actualEvents: any[], expectedEvents: any[]) {
   }
 }
 
-export function main() {
+{
   describe('convertPerfProfileToEvents', function() {
     it('should convert single instantaneous event', function() {
       const profileData = {
diff --git a/packages/benchpress/test/metric/multi_metric_spec.ts b/packages/benchpress/test/metric/multi_metric_spec.ts
index f8f8a9324f..20f754f541 100644
--- a/packages/benchpress/test/metric/multi_metric_spec.ts
+++ b/packages/benchpress/test/metric/multi_metric_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, Metric, MultiMetric} from '../../index';
 
-export function main() {
+(function(){
   function createMetric(ids: any[]) {
     const m = Injector
                   .create([
@@ -49,7 +49,7 @@ export function main() {
     });
 
   });
-}
+})();
 
 class MockMetric extends Metric {
   constructor(private _id: string) { super(); }
diff --git a/packages/benchpress/test/metric/perflog_metric_spec.ts b/packages/benchpress/test/metric/perflog_metric_spec.ts
index a8ad908d50..be578c2bbf 100644
--- a/packages/benchpress/test/metric/perflog_metric_spec.ts
+++ b/packages/benchpress/test/metric/perflog_metric_spec.ts
@@ -12,7 +12,7 @@ import {AsyncTestCompleter, beforeEach, describe, expect, inject, it} from '@ang
 import {Injector, Metric, Options, PerfLogEvent, PerfLogFeatures, PerflogMetric, WebDriverExtension} from '../../index';
 import {TraceEventFactory} from '../trace_event_factory';
 
-export function main() {
+(function(){
   let commandLog: any[];
   const eventFactory = new TraceEventFactory('timeline', 'pid0');
 
@@ -680,7 +680,7 @@ export function main() {
     });
 
   });
-}
+})();
 
 class MockDriverExtension extends WebDriverExtension {
   constructor(
diff --git a/packages/benchpress/test/metric/user_metric_spec.ts b/packages/benchpress/test/metric/user_metric_spec.ts
index 6884620b68..681635362a 100644
--- a/packages/benchpress/test/metric/user_metric_spec.ts
+++ b/packages/benchpress/test/metric/user_metric_spec.ts
@@ -11,7 +11,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Options, PerfLogEvent, PerfLogFeatures, UserMetric, WebDriverAdapter} from '../../index';
 
-export function main() {
+(function(){
   let wdAdapter: MockDriverAdapter;
 
   function createMetric(
@@ -63,7 +63,7 @@ export function main() {
          }), 600);
     });
   });
-}
+})();
 
 class MockDriverAdapter extends WebDriverAdapter {
   data: any = {};
diff --git a/packages/benchpress/test/reporter/console_reporter_spec.ts b/packages/benchpress/test/reporter/console_reporter_spec.ts
index 7e3c15b6cb..950b1a1cc1 100644
--- a/packages/benchpress/test/reporter/console_reporter_spec.ts
+++ b/packages/benchpress/test/reporter/console_reporter_spec.ts
@@ -11,7 +11,7 @@ import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 
 import {ConsoleReporter, Injector, MeasureValues, SampleDescription} from '../../index';
 
-export function main() {
+{
   describe('console reporter', () => {
     let reporter: ConsoleReporter;
     let log: string[];
diff --git a/packages/benchpress/test/reporter/json_file_reporter_spec.ts b/packages/benchpress/test/reporter/json_file_reporter_spec.ts
index 6ca8647346..2ca147f237 100644
--- a/packages/benchpress/test/reporter/json_file_reporter_spec.ts
+++ b/packages/benchpress/test/reporter/json_file_reporter_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, JsonFileReporter, MeasureValues, Options, SampleDescription} from '../../index';
 
-export function main() {
+{
   describe('file reporter', () => {
     let loggedFile: any;
 
diff --git a/packages/benchpress/test/reporter/multi_reporter_spec.ts b/packages/benchpress/test/reporter/multi_reporter_spec.ts
index 4c9e2c698a..db395128c0 100644
--- a/packages/benchpress/test/reporter/multi_reporter_spec.ts
+++ b/packages/benchpress/test/reporter/multi_reporter_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, MeasureValues, MultiReporter, Reporter} from '../../index';
 
-export function main() {
+(function(){
   function createReporters(ids: any[]) {
     const r = Injector
                   .create([
@@ -51,7 +51,7 @@ export function main() {
        }));
 
   });
-}
+})();
 
 class MockReporter extends Reporter {
   constructor(private _id: string) { super(); }
diff --git a/packages/benchpress/test/runner_spec.ts b/packages/benchpress/test/runner_spec.ts
index 27683730c5..3487b5988e 100644
--- a/packages/benchpress/test/runner_spec.ts
+++ b/packages/benchpress/test/runner_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, Metric, Options, Runner, SampleDescription, SampleState, Sampler, Validator, WebDriverAdapter} from '../index';
 
-export function main() {
+{
   describe('runner', () => {
     let injector: Injector;
     let runner: Runner;
diff --git a/packages/benchpress/test/sampler_spec.ts b/packages/benchpress/test/sampler_spec.ts
index 82ca5d6d64..9b1b7864e3 100644
--- a/packages/benchpress/test/sampler_spec.ts
+++ b/packages/benchpress/test/sampler_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, MeasureValues, Metric, Options, Reporter, Sampler, Validator, WebDriverAdapter} from '../index';
 
-export function main() {
+{
   const EMPTY_EXECUTE = () => {};
 
   describe('sampler', () => {
diff --git a/packages/benchpress/test/statistic_spec.ts b/packages/benchpress/test/statistic_spec.ts
index a1680fe34e..efbeaa8766 100644
--- a/packages/benchpress/test/statistic_spec.ts
+++ b/packages/benchpress/test/statistic_spec.ts
@@ -9,7 +9,7 @@
 import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {Statistic} from '../src/statistic';
 
-export function main() {
+{
   describe('statistic', () => {
 
     it('should calculate the mean', () => {
diff --git a/packages/benchpress/test/validator/regression_slope_validator_spec.ts b/packages/benchpress/test/validator/regression_slope_validator_spec.ts
index 3b8c3e02ce..07cc120cc9 100644
--- a/packages/benchpress/test/validator/regression_slope_validator_spec.ts
+++ b/packages/benchpress/test/validator/regression_slope_validator_spec.ts
@@ -10,7 +10,7 @@ import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 
 import {Injector, MeasureValues, RegressionSlopeValidator} from '../../index';
 
-export function main() {
+{
   describe('regression slope validator', () => {
     let validator: RegressionSlopeValidator;
 
diff --git a/packages/benchpress/test/validator/size_validator_spec.ts b/packages/benchpress/test/validator/size_validator_spec.ts
index da5a14ad57..782b36ab1f 100644
--- a/packages/benchpress/test/validator/size_validator_spec.ts
+++ b/packages/benchpress/test/validator/size_validator_spec.ts
@@ -10,7 +10,7 @@ import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 
 import {Injector, MeasureValues, SizeValidator} from '../../index';
 
-export function main() {
+{
   describe('size validator', () => {
     let validator: SizeValidator;
 
diff --git a/packages/benchpress/test/web_driver_extension_spec.ts b/packages/benchpress/test/web_driver_extension_spec.ts
index 178f851262..9183d58990 100644
--- a/packages/benchpress/test/web_driver_extension_spec.ts
+++ b/packages/benchpress/test/web_driver_extension_spec.ts
@@ -10,7 +10,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 
 import {Injector, Options, WebDriverExtension} from '../index';
 
-export function main() {
+(function(){
   function createExtension(ids: any[], caps: any) {
     return new Promise<any>((res, rej) => {
       try {
@@ -45,7 +45,7 @@ export function main() {
          });
        }));
   });
-}
+})();
 
 class MockExtension extends WebDriverExtension {
   constructor(public id: string) { super(); }
diff --git a/packages/benchpress/test/webdriver/chrome_driver_extension_spec.ts b/packages/benchpress/test/webdriver/chrome_driver_extension_spec.ts
index ebb17e3d9b..e81e10481d 100644
--- a/packages/benchpress/test/webdriver/chrome_driver_extension_spec.ts
+++ b/packages/benchpress/test/webdriver/chrome_driver_extension_spec.ts
@@ -11,7 +11,7 @@ import {AsyncTestCompleter, describe, expect, iit, inject, it} from '@angular/co
 import {ChromeDriverExtension, Injector, Options, WebDriverAdapter, WebDriverExtension} from '../../index';
 import {TraceEventFactory} from '../trace_event_factory';
 
-export function main() {
+{
   describe('chrome driver extension', () => {
     const CHROME45_USER_AGENT =
         '"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2499.0 Safari/537.36"';
diff --git a/packages/benchpress/test/webdriver/ios_driver_extension_spec.ts b/packages/benchpress/test/webdriver/ios_driver_extension_spec.ts
index 7ff0cd6b13..f2edbc7740 100644
--- a/packages/benchpress/test/webdriver/ios_driver_extension_spec.ts
+++ b/packages/benchpress/test/webdriver/ios_driver_extension_spec.ts
@@ -11,7 +11,7 @@ import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/te
 import {IOsDriverExtension, Injector, WebDriverAdapter, WebDriverExtension} from '../../index';
 import {TraceEventFactory} from '../trace_event_factory';
 
-export function main() {
+{
   describe('ios driver extension', () => {
     let log: any[];
     let extension: IOsDriverExtension;
diff --git a/packages/common/http/test/client_spec.ts b/packages/common/http/test/client_spec.ts
index b2067d6330..0b901222bb 100644
--- a/packages/common/http/test/client_spec.ts
+++ b/packages/common/http/test/client_spec.ts
@@ -15,7 +15,7 @@ import {HttpClient} from '../src/client';
 import {HttpErrorResponse, HttpEventType, HttpResponse} from '../src/response';
 import {HttpClientTestingBackend} from '../testing/src/backend';
 
-export function main() {
+{
   describe('HttpClient', () => {
     let client: HttpClient = null !;
     let backend: HttpClientTestingBackend = null !;
diff --git a/packages/common/http/test/headers_spec.ts b/packages/common/http/test/headers_spec.ts
index f161c66d5b..e26b07f4d7 100644
--- a/packages/common/http/test/headers_spec.ts
+++ b/packages/common/http/test/headers_spec.ts
@@ -8,7 +8,7 @@
 
 import {HttpHeaders} from '../src/headers';
 
-export function main() {
+{
   describe('HttpHeaders', () => {
 
     describe('initialization', () => {
diff --git a/packages/common/http/test/jsonp_spec.ts b/packages/common/http/test/jsonp_spec.ts
index 141cd544db..a559af8d51 100644
--- a/packages/common/http/test/jsonp_spec.ts
+++ b/packages/common/http/test/jsonp_spec.ts
@@ -24,7 +24,7 @@ function runOnlyCallback(home: any, data: Object) {
 
 const SAMPLE_REQ = new HttpRequest<never>('JSONP', '/test');
 
-export function main() {
+{
   describe('JsonpClientBackend', () => {
     let home = {};
     let document: MockDocument;
diff --git a/packages/common/http/test/module_spec.ts b/packages/common/http/test/module_spec.ts
index 9d846aa476..7773d115f6 100644
--- a/packages/common/http/test/module_spec.ts
+++ b/packages/common/http/test/module_spec.ts
@@ -47,7 +47,7 @@ class InterceptorB extends TestInterceptor {
   constructor() { super('B'); }
 }
 
-export function main() {
+{
   describe('HttpClientModule', () => {
     let injector: Injector;
     beforeEach(() => {
diff --git a/packages/common/http/test/params_spec.ts b/packages/common/http/test/params_spec.ts
index 8bc167836b..304ebb1ec2 100644
--- a/packages/common/http/test/params_spec.ts
+++ b/packages/common/http/test/params_spec.ts
@@ -8,7 +8,7 @@
 
 import {HttpParams} from '../src/params';
 
-export function main() {
+{
   describe('HttpUrlEncodedParams', () => {
     describe('initialization', () => {
       it('should be empty at construction', () => {
diff --git a/packages/common/http/test/request_spec.ts b/packages/common/http/test/request_spec.ts
index 23960831a3..d5ed4549ad 100644
--- a/packages/common/http/test/request_spec.ts
+++ b/packages/common/http/test/request_spec.ts
@@ -15,7 +15,7 @@ import {HttpRequest} from '../src/request';
 const TEST_URL = 'http://angular.io';
 const TEST_STRING = `I'm a body!`;
 
-export function main() {
+{
   describe('HttpRequest', () => {
     describe('constructor', () => {
       it('initializes url', () => {
diff --git a/packages/common/http/test/response_spec.ts b/packages/common/http/test/response_spec.ts
index 50eb29b7b2..c2e116a08e 100644
--- a/packages/common/http/test/response_spec.ts
+++ b/packages/common/http/test/response_spec.ts
@@ -11,7 +11,7 @@ import {ddescribe, describe, it} from '@angular/core/testing/src/testing_interna
 import {HttpHeaders} from '../src/headers';
 import {HttpResponse} from '../src/response';
 
-export function main() {
+{
   describe('HttpResponse', () => {
     describe('constructor()', () => {
       it('fully constructs responses', () => {
diff --git a/packages/common/http/test/xhr_spec.ts b/packages/common/http/test/xhr_spec.ts
index f6e3a9ab5d..c5fa3a75fc 100644
--- a/packages/common/http/test/xhr_spec.ts
+++ b/packages/common/http/test/xhr_spec.ts
@@ -27,7 +27,7 @@ const TEST_POST = new HttpRequest('POST', '/test', 'some body', {
 
 const XSSI_PREFIX = ')]}\'\n';
 
-export function main() {
+{
   describe('XhrBackend', () => {
     let factory: MockXhrFactory = null !;
     let backend: HttpXhrBackend = null !;
diff --git a/packages/common/http/test/xsrf_spec.ts b/packages/common/http/test/xsrf_spec.ts
index 1c5c235432..20a3ac8250 100644
--- a/packages/common/http/test/xsrf_spec.ts
+++ b/packages/common/http/test/xsrf_spec.ts
@@ -19,7 +19,7 @@ class SampleTokenExtractor {
   getToken(): string|null { return this.token; }
 }
 
-export function main() {
+{
   describe('HttpXsrfInterceptor', () => {
     let backend: HttpClientTestingBackend;
     const interceptor = new HttpXsrfInterceptor(new SampleTokenExtractor('test'), 'X-XSRF-TOKEN');
diff --git a/packages/common/test/common_module_spec.ts b/packages/common/test/common_module_spec.ts
index 71b85f1979..be40f6722f 100644
--- a/packages/common/test/common_module_spec.ts
+++ b/packages/common/test/common_module_spec.ts
@@ -12,7 +12,7 @@ import {DeprecatedI18NPipesModule} from '../src/common_module';
 import {Plural} from '../src/i18n/locale_data_api';
 import {DEPRECATED_PLURAL_FN, getPluralCase} from '../src/i18n/localization';
 
-export function main() {
+{
   describe('DeprecatedI18NPipesModule', () => {
     beforeEach(() => { TestBed.configureTestingModule({imports: [DeprecatedI18NPipesModule]}); });
 
diff --git a/packages/common/test/cookie_spec.ts b/packages/common/test/cookie_spec.ts
index e0a8eeefa4..36b10c0e35 100644
--- a/packages/common/test/cookie_spec.ts
+++ b/packages/common/test/cookie_spec.ts
@@ -19,7 +19,7 @@
 import {parseCookieValue} from '@angular/common/src/cookie';
 import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 
-export function main() {
+{
   describe('cookies', () => {
     it('parses cookies', () => {
       const cookie = 'other-cookie=false; xsrf-token=token-value; is_awesome=true; ffo=true;';
diff --git a/packages/common/test/directives/ng_class_spec.ts b/packages/common/test/directives/ng_class_spec.ts
index 8d3ecaecc5..4db790b5b7 100644
--- a/packages/common/test/directives/ng_class_spec.ts
+++ b/packages/common/test/directives/ng_class_spec.ts
@@ -9,7 +9,7 @@
 import {Component} from '@angular/core';
 import {ComponentFixture, TestBed, async} from '@angular/core/testing';
 
-export function main() {
+{
   describe('binding to CSS class list', () => {
     let fixture: ComponentFixture<any>|null;
 
diff --git a/packages/common/test/directives/ng_component_outlet_spec.ts b/packages/common/test/directives/ng_component_outlet_spec.ts
index 45f2c5e8b3..b920952a99 100644
--- a/packages/common/test/directives/ng_component_outlet_spec.ts
+++ b/packages/common/test/directives/ng_component_outlet_spec.ts
@@ -12,7 +12,7 @@ import {Compiler, Component, ComponentRef, Inject, InjectionToken, Injector, NO_
 import {TestBed, async, fakeAsync} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('insert/remove', () => {
 
     beforeEach(() => { TestBed.configureTestingModule({imports: [TestModule]}); });
diff --git a/packages/common/test/directives/ng_for_spec.ts b/packages/common/test/directives/ng_for_spec.ts
index ecc6725b98..541d1863cc 100644
--- a/packages/common/test/directives/ng_for_spec.ts
+++ b/packages/common/test/directives/ng_for_spec.ts
@@ -14,7 +14,7 @@ import {expect} from '@angular/platform-browser/testing/src/matchers';
 
 let thisArg: any;
 
-export function main() {
+{
   describe('ngFor', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/ng_if_spec.ts b/packages/common/test/directives/ng_if_spec.ts
index a0009bf149..a7ac754601 100644
--- a/packages/common/test/directives/ng_if_spec.ts
+++ b/packages/common/test/directives/ng_if_spec.ts
@@ -13,7 +13,7 @@ import {By} from '@angular/platform-browser/src/dom/debug/by';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('ngIf directive', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/ng_plural_spec.ts b/packages/common/test/directives/ng_plural_spec.ts
index b12904247e..07e6e66740 100644
--- a/packages/common/test/directives/ng_plural_spec.ts
+++ b/packages/common/test/directives/ng_plural_spec.ts
@@ -11,7 +11,7 @@ import {Component, Injectable} from '@angular/core';
 import {ComponentFixture, TestBed, async} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('ngPlural', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/ng_style_spec.ts b/packages/common/test/directives/ng_style_spec.ts
index 754c05823a..baddb55144 100644
--- a/packages/common/test/directives/ng_style_spec.ts
+++ b/packages/common/test/directives/ng_style_spec.ts
@@ -10,7 +10,7 @@ import {CommonModule} from '@angular/common';
 import {Component} from '@angular/core';
 import {ComponentFixture, TestBed, async} from '@angular/core/testing';
 
-export function main() {
+{
   describe('NgStyle', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/ng_switch_spec.ts b/packages/common/test/directives/ng_switch_spec.ts
index 8587b99a52..3adf2a1614 100644
--- a/packages/common/test/directives/ng_switch_spec.ts
+++ b/packages/common/test/directives/ng_switch_spec.ts
@@ -11,7 +11,7 @@ import {Attribute, Component, Directive} from '@angular/core';
 import {ComponentFixture, TestBed} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('NgSwitch', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/ng_template_outlet_spec.ts b/packages/common/test/directives/ng_template_outlet_spec.ts
index 13135629cd..a9bcca57e2 100644
--- a/packages/common/test/directives/ng_template_outlet_spec.ts
+++ b/packages/common/test/directives/ng_template_outlet_spec.ts
@@ -11,7 +11,7 @@ import {Component, ContentChildren, Directive, Injectable, NO_ERRORS_SCHEMA, OnD
 import {ComponentFixture, TestBed, async} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('NgTemplateOutlet', () => {
     let fixture: ComponentFixture<any>;
 
diff --git a/packages/common/test/directives/non_bindable_spec.ts b/packages/common/test/directives/non_bindable_spec.ts
index 84648ac901..a6ee2330f4 100644
--- a/packages/common/test/directives/non_bindable_spec.ts
+++ b/packages/common/test/directives/non_bindable_spec.ts
@@ -12,7 +12,7 @@ import {ComponentFixture, TestBed, async} from '@angular/core/testing';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('non-bindable', () => {
 
     beforeEach(() => {
diff --git a/packages/common/test/i18n/locale_data_api_spec.ts b/packages/common/test/i18n/locale_data_api_spec.ts
index 7d659446e3..4506b4886f 100644
--- a/packages/common/test/i18n/locale_data_api_spec.ts
+++ b/packages/common/test/i18n/locale_data_api_spec.ts
@@ -13,7 +13,7 @@ import localeFrCA from '../../locales/fr-CA';
 import {registerLocaleData} from '../../src/i18n/locale_data';
 import {findLocaleData} from '../../src/i18n/locale_data_api';
 
-export function main() {
+{
   describe('locale data api', () => {
     beforeAll(() => {
       registerLocaleData(localeCaESVALENCIA);
diff --git a/packages/common/test/i18n/localization_spec.ts b/packages/common/test/i18n/localization_spec.ts
index f04b5970a4..fea5870e35 100644
--- a/packages/common/test/i18n/localization_spec.ts
+++ b/packages/common/test/i18n/localization_spec.ts
@@ -16,7 +16,7 @@ import {NgLocaleLocalization, NgLocalization, getPluralCategory, DEPRECATED_PLUR
 import {Plural} from '../../src/i18n/locale_data_api';
 import {registerLocaleData} from '../../src/i18n/locale_data';
 
-export function main() {
+{
   describe('l10n', () => {
     beforeAll(() => {
       registerLocaleData(localeRo);
diff --git a/packages/common/test/location/location_spec.ts b/packages/common/test/location/location_spec.ts
index 7a110955d7..7d1fe22ebc 100644
--- a/packages/common/test/location/location_spec.ts
+++ b/packages/common/test/location/location_spec.ts
@@ -8,7 +8,7 @@
 
 import {Location} from '../../src/location/location';
 
-export function main() {
+{
   const baseUrl = '/base';
 
   describe('Location Class', () => {
diff --git a/packages/common/test/pipes/async_pipe_spec.ts b/packages/common/test/pipes/async_pipe_spec.ts
index 6dece78987..20babf8a9d 100644
--- a/packages/common/test/pipes/async_pipe_spec.ts
+++ b/packages/common/test/pipes/async_pipe_spec.ts
@@ -14,7 +14,7 @@ import {browserDetection} from '@angular/platform-browser/testing/src/browser_ut
 
 import {SpyChangeDetectorRef} from '../spies';
 
-export function main() {
+{
   describe('AsyncPipe', () => {
 
     describe('Observable', () => {
diff --git a/packages/common/test/pipes/case_conversion_pipes_spec.ts b/packages/common/test/pipes/case_conversion_pipes_spec.ts
index 808b3f4a78..addde68fed 100644
--- a/packages/common/test/pipes/case_conversion_pipes_spec.ts
+++ b/packages/common/test/pipes/case_conversion_pipes_spec.ts
@@ -8,7 +8,7 @@
 
 import {LowerCasePipe, TitleCasePipe, UpperCasePipe} from '@angular/common';
 
-export function main() {
+{
   describe('LowerCasePipe', () => {
     let pipe: LowerCasePipe;
 
diff --git a/packages/common/test/pipes/date_pipe_spec.ts b/packages/common/test/pipes/date_pipe_spec.ts
index 353b16ba10..a3fc65ecf3 100644
--- a/packages/common/test/pipes/date_pipe_spec.ts
+++ b/packages/common/test/pipes/date_pipe_spec.ts
@@ -16,7 +16,7 @@ import localeHu from '../../locales/hu';
 import localeSr from '../../locales/sr';
 import localeTh from '../../locales/th';
 
-export function main() {
+{
   describe('DatePipe', () => {
     let date: Date;
     const isoStringWithoutTime = '2015-01-01';
diff --git a/packages/common/test/pipes/deprecated/date_pipe_spec.ts b/packages/common/test/pipes/deprecated/date_pipe_spec.ts
index d1bbc586ac..b691f53b9a 100644
--- a/packages/common/test/pipes/deprecated/date_pipe_spec.ts
+++ b/packages/common/test/pipes/deprecated/date_pipe_spec.ts
@@ -11,7 +11,7 @@ import {PipeResolver} from '@angular/compiler/src/pipe_resolver';
 import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_reflector';
 import {browserDetection} from '@angular/platform-browser/testing/src/browser_util';
 
-export function main() {
+{
   describe('DeprecatedDatePipe', () => {
     let date: Date;
     const isoStringWithoutTime = '2015-01-01';
diff --git a/packages/common/test/pipes/deprecated/number_pipe_spec.ts b/packages/common/test/pipes/deprecated/number_pipe_spec.ts
index a0fb5edfc7..d4dcda69fd 100644
--- a/packages/common/test/pipes/deprecated/number_pipe_spec.ts
+++ b/packages/common/test/pipes/deprecated/number_pipe_spec.ts
@@ -10,7 +10,7 @@ import {DeprecatedCurrencyPipe, DeprecatedDecimalPipe, DeprecatedPercentPipe} fr
 import {beforeEach, describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {browserDetection} from '@angular/platform-browser/testing/src/browser_util';
 
-export function main() {
+(function(){
   function isNumeric(value: any): boolean { return !isNaN(value - parseFloat(value)); }
 
   // Between the symbol and the number, Edge adds a no breaking space and IE11 adds a standard space
@@ -106,4 +106,4 @@ export function main() {
          () => { expect(isNumeric('2a')).toBe(false); });
     });
   });
-}
+})();
diff --git a/packages/common/test/pipes/i18n_plural_pipe_spec.ts b/packages/common/test/pipes/i18n_plural_pipe_spec.ts
index 0dc60f8ad5..2941584b3c 100644
--- a/packages/common/test/pipes/i18n_plural_pipe_spec.ts
+++ b/packages/common/test/pipes/i18n_plural_pipe_spec.ts
@@ -11,7 +11,7 @@ import {PipeResolver} from '@angular/compiler/src/pipe_resolver';
 import {beforeEach, describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_reflector';
 
-export function main() {
+{
   describe('I18nPluralPipe', () => {
     let localization: NgLocalization;
     let pipe: I18nPluralPipe;
diff --git a/packages/common/test/pipes/i18n_select_pipe_spec.ts b/packages/common/test/pipes/i18n_select_pipe_spec.ts
index d0b716f032..2d68a237d3 100644
--- a/packages/common/test/pipes/i18n_select_pipe_spec.ts
+++ b/packages/common/test/pipes/i18n_select_pipe_spec.ts
@@ -10,7 +10,7 @@ import {I18nSelectPipe} from '@angular/common';
 import {PipeResolver} from '@angular/compiler/src/pipe_resolver';
 import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_reflector';
 
-export function main() {
+{
   describe('I18nSelectPipe', () => {
     const pipe: I18nSelectPipe = new I18nSelectPipe();
     const mapping = {'male': 'Invite him.', 'female': 'Invite her.', 'other': 'Invite them.'};
diff --git a/packages/common/test/pipes/json_pipe_spec.ts b/packages/common/test/pipes/json_pipe_spec.ts
index 36b5621b59..a9f5e4637d 100644
--- a/packages/common/test/pipes/json_pipe_spec.ts
+++ b/packages/common/test/pipes/json_pipe_spec.ts
@@ -11,7 +11,7 @@ import {Component} from '@angular/core';
 import {TestBed, async} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('JsonPipe', () => {
     const regNewLine = '\n';
     let inceptionObj: any;
diff --git a/packages/common/test/pipes/number_pipe_spec.ts b/packages/common/test/pipes/number_pipe_spec.ts
index 5a34182868..af354e9abd 100644
--- a/packages/common/test/pipes/number_pipe_spec.ts
+++ b/packages/common/test/pipes/number_pipe_spec.ts
@@ -12,7 +12,7 @@ import localeFr from '../../locales/fr';
 import {registerLocaleData, CurrencyPipe, DecimalPipe, PercentPipe} from '@angular/common';
 import {beforeEach, describe, expect, it} from '@angular/core/testing/src/testing_internal';
 
-export function main() {
+{
   describe('Number pipes', () => {
     beforeAll(() => {
       registerLocaleData(localeEn);
diff --git a/packages/common/test/pipes/slice_pipe_spec.ts b/packages/common/test/pipes/slice_pipe_spec.ts
index 4dc7aa9c7f..8ed5c41bb2 100644
--- a/packages/common/test/pipes/slice_pipe_spec.ts
+++ b/packages/common/test/pipes/slice_pipe_spec.ts
@@ -11,7 +11,7 @@ import {Component} from '@angular/core';
 import {TestBed, async} from '@angular/core/testing';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('SlicePipe', () => {
     let list: number[];
     let str: string;
diff --git a/packages/compiler/test/aot/summary_resolver_spec.ts b/packages/compiler/test/aot/summary_resolver_spec.ts
index 87832a1539..c431d863dc 100644
--- a/packages/compiler/test/aot/summary_resolver_spec.ts
+++ b/packages/compiler/test/aot/summary_resolver_spec.ts
@@ -16,7 +16,7 @@ import {MockStaticSymbolResolverHost, MockSummaryResolver} from './static_symbol
 
 const EXT = /(\.d)?\.ts$/;
 
-export function main() {
+{
   describe('AotSummaryResolver', () => {
     let summaryResolver: AotSummaryResolver;
     let symbolCache: StaticSymbolCache;
diff --git a/packages/compiler/test/aot/summary_serializer_spec.ts b/packages/compiler/test/aot/summary_serializer_spec.ts
index 1ad1ebbafe..26cae7dd97 100644
--- a/packages/compiler/test/aot/summary_serializer_spec.ts
+++ b/packages/compiler/test/aot/summary_serializer_spec.ts
@@ -15,7 +15,7 @@ import {MockStaticSymbolResolverHost} from './static_symbol_resolver_spec';
 import {MockAotSummaryResolverHost, createMockOutputContext} from './summary_resolver_spec';
 
 
-export function main() {
+{
   describe('summary serializer', () => {
     let summaryResolver: AotSummaryResolver;
     let symbolResolver: StaticSymbolResolver;
diff --git a/packages/compiler/test/config_spec.ts b/packages/compiler/test/config_spec.ts
index f7fd61d46d..6d164afc63 100644
--- a/packages/compiler/test/config_spec.ts
+++ b/packages/compiler/test/config_spec.ts
@@ -9,7 +9,7 @@
 import {MissingTranslationStrategy} from '@angular/core';
 import {CompilerConfig} from '../src/config';
 
-export function main() {
+{
   describe('compiler config', () => {
     it('should set missing translation strategy', () => {
       const config = new CompilerConfig({missingTranslation: MissingTranslationStrategy.Error});
diff --git a/packages/compiler/test/core_spec.ts b/packages/compiler/test/core_spec.ts
index 315cf073df..fb022ead68 100644
--- a/packages/compiler/test/core_spec.ts
+++ b/packages/compiler/test/core_spec.ts
@@ -9,7 +9,7 @@
 import {core as compilerCore} from '@angular/compiler';
 import * as core from '@angular/core';
 
-export function main() {
+{
   describe('compiler core', () => {
     it('Attribute should be equal', () => {
       typeExtends<compilerCore.Attribute, core.Attribute>();
diff --git a/packages/compiler/test/css_parser/css_lexer_spec.ts b/packages/compiler/test/css_parser/css_lexer_spec.ts
index 5399131589..4bf82d5613 100644
--- a/packages/compiler/test/css_parser/css_lexer_spec.ts
+++ b/packages/compiler/test/css_parser/css_lexer_spec.ts
@@ -9,7 +9,7 @@
 import {describe, expect, it} from '../../../core/testing/src/testing_internal';
 import {CssLexer, CssLexerMode, CssToken, CssTokenType, cssScannerError, getRawMessage, getToken} from '../../src/css_parser/css_lexer';
 
-export function main() {
+(function(){
   function tokenize(
       code: string, trackComments: boolean = false,
       mode: CssLexerMode = CssLexerMode.ALL): CssToken[] {
@@ -373,4 +373,4 @@ export function main() {
              });
         });
   });
-}
+})();
diff --git a/packages/compiler/test/css_parser/css_parser_spec.ts b/packages/compiler/test/css_parser/css_parser_spec.ts
index 979f8b466f..670a48264b 100644
--- a/packages/compiler/test/css_parser/css_parser_spec.ts
+++ b/packages/compiler/test/css_parser/css_parser_spec.ts
@@ -18,7 +18,7 @@ export function assertTokens(tokens: CssToken[], valuesArr: string[]) {
   }
 }
 
-export function main() {
+{
   describe('CssParser', () => {
     function parse(css: string): ParsedCssResult {
       return new CssParser().parse(css, 'some-fake-css-file.css');
diff --git a/packages/compiler/test/css_parser/css_visitor_spec.ts b/packages/compiler/test/css_parser/css_visitor_spec.ts
index 46538339f3..248d61df85 100644
--- a/packages/compiler/test/css_parser/css_visitor_spec.ts
+++ b/packages/compiler/test/css_parser/css_visitor_spec.ts
@@ -115,7 +115,7 @@ function _getCaptureAst(capture: any[], index = 0): CssAst {
   return <CssAst>capture[index][0];
 }
 
-export function main() {
+(function(){
   function parse(cssCode: string, ignoreErrors: boolean = false) {
     const output = new CssParser().parse(cssCode, 'some-fake-css-file.css');
     const errors = output.errors;
@@ -318,4 +318,4 @@ export function main() {
       _assertTokens(rule.tokens, ['six', 'seven', 'eight']);
     });
   });
-}
+})();
diff --git a/packages/compiler/test/directive_lifecycle_spec.ts b/packages/compiler/test/directive_lifecycle_spec.ts
index 5d1193ccda..a4bd85928f 100644
--- a/packages/compiler/test/directive_lifecycle_spec.ts
+++ b/packages/compiler/test/directive_lifecycle_spec.ts
@@ -14,7 +14,7 @@ function hasLifecycleHook(hook: Hooks, directive: any): boolean {
   return hasLifecycleHookImpl(new JitReflector(), hook, directive);
 }
 
-export function main() {
+{
   describe('Create Directive', () => {
     describe('lifecycle', () => {
 
diff --git a/packages/compiler/test/directive_normalizer_spec.ts b/packages/compiler/test/directive_normalizer_spec.ts
index f0504ac148..34bd29d809 100644
--- a/packages/compiler/test/directive_normalizer_spec.ts
+++ b/packages/compiler/test/directive_normalizer_spec.ts
@@ -42,7 +42,7 @@ function normalizeTemplate(normalizer: DirectiveNormalizer, o: {
   });
 }
 
-export function main() {
+{
   describe('DirectiveNormalizer', () => {
     let resourceLoaderSpy: jasmine.Spy;
 
diff --git a/packages/compiler/test/directive_resolver_mock_spec.ts b/packages/compiler/test/directive_resolver_mock_spec.ts
index 48be217725..dc1a82cff9 100644
--- a/packages/compiler/test/directive_resolver_mock_spec.ts
+++ b/packages/compiler/test/directive_resolver_mock_spec.ts
@@ -12,7 +12,7 @@ import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_refle
 
 import {MockDirectiveResolver} from '../testing';
 
-export function main() {
+{
   describe('MockDirectiveResolver', () => {
     let dirResolver: MockDirectiveResolver;
 
diff --git a/packages/compiler/test/directive_resolver_spec.ts b/packages/compiler/test/directive_resolver_spec.ts
index f8103b3987..4d211643f9 100644
--- a/packages/compiler/test/directive_resolver_spec.ts
+++ b/packages/compiler/test/directive_resolver_spec.ts
@@ -112,7 +112,7 @@ class SomeDirectiveWithMalformedHostBinding2 {
 
 class SomeDirectiveWithoutMetadata {}
 
-export function main() {
+{
   describe('DirectiveResolver', () => {
     let resolver: DirectiveResolver;
 
diff --git a/packages/compiler/test/expression_parser/lexer_spec.ts b/packages/compiler/test/expression_parser/lexer_spec.ts
index 74e74c353b..2072748e1d 100644
--- a/packages/compiler/test/expression_parser/lexer_spec.ts
+++ b/packages/compiler/test/expression_parser/lexer_spec.ts
@@ -58,7 +58,7 @@ function expectErrorToken(token: Token, index: any, message: string) {
   expect(token.toString()).toEqual(message);
 }
 
-export function main() {
+{
   describe('lexer', () => {
     describe('token', () => {
       it('should tokenize a simple identifier', () => {
diff --git a/packages/compiler/test/expression_parser/parser_spec.ts b/packages/compiler/test/expression_parser/parser_spec.ts
index 260a516be0..7a127b852f 100644
--- a/packages/compiler/test/expression_parser/parser_spec.ts
+++ b/packages/compiler/test/expression_parser/parser_spec.ts
@@ -15,7 +15,7 @@ import {expect} from '@angular/platform-browser/testing/src/matchers';
 import {unparse} from './unparser';
 import {validate} from './validator';
 
-export function main() {
+(function(){
   function createParser() { return new Parser(new Lexer()); }
 
   function parseAction(text: string, location: any = null): ASTWithSource {
@@ -604,4 +604,4 @@ export function main() {
       });
     });
   });
-}
+})();
diff --git a/packages/compiler/test/i18n/digest_spec.ts b/packages/compiler/test/i18n/digest_spec.ts
index 532430d64f..22bd7b6eb6 100644
--- a/packages/compiler/test/i18n/digest_spec.ts
+++ b/packages/compiler/test/i18n/digest_spec.ts
@@ -8,7 +8,7 @@
 
 import {computeMsgId, digest, sha1} from '../../src/i18n/digest';
 
-export function main(): void {
+{
   describe('digest', () => {
     describe('digest', () => {
       it('must return the ID if it\'s explicit', () => {
diff --git a/packages/compiler/test/i18n/extractor_merger_spec.ts b/packages/compiler/test/i18n/extractor_merger_spec.ts
index ff1809672a..5b1a05b8c0 100644
--- a/packages/compiler/test/i18n/extractor_merger_spec.ts
+++ b/packages/compiler/test/i18n/extractor_merger_spec.ts
@@ -16,7 +16,7 @@ import {TranslationBundle} from '../../src/i18n/translation_bundle';
 import * as html from '../../src/ml_parser/ast';
 import {serializeNodes as serializeHtmlNodes} from '../ml_parser/ast_serializer_spec';
 
-export function main() {
+{
   describe('Extractor', () => {
     describe('elements', () => {
       it('should extract from elements', () => {
diff --git a/packages/compiler/test/i18n/i18n_html_parser_spec.ts b/packages/compiler/test/i18n/i18n_html_parser_spec.ts
index 84afbd9e7d..e4edccc85b 100644
--- a/packages/compiler/test/i18n/i18n_html_parser_spec.ts
+++ b/packages/compiler/test/i18n/i18n_html_parser_spec.ts
@@ -11,7 +11,7 @@ import {TranslationBundle} from '@angular/compiler/src/i18n/translation_bundle';
 import {HtmlParser} from '@angular/compiler/src/ml_parser/html_parser';
 import {ParseTreeResult} from '@angular/compiler/src/ml_parser/parser';
 
-export function main() {
+{
   describe('I18N html parser', () => {
     // https://github.com/angular/angular/issues/14322
     it('should parse the translations only once', () => {
diff --git a/packages/compiler/test/i18n/i18n_parser_spec.ts b/packages/compiler/test/i18n/i18n_parser_spec.ts
index abbd2d1020..4b9994ee27 100644
--- a/packages/compiler/test/i18n/i18n_parser_spec.ts
+++ b/packages/compiler/test/i18n/i18n_parser_spec.ts
@@ -12,7 +12,7 @@ import {Message} from '@angular/compiler/src/i18n/i18n_ast';
 import {HtmlParser} from '@angular/compiler/src/ml_parser/html_parser';
 import {DEFAULT_INTERPOLATION_CONFIG} from '@angular/compiler/src/ml_parser/interpolation_config';
 
-export function main() {
+{
   describe('I18nParser', () => {
 
     describe('elements', () => {
diff --git a/packages/compiler/test/i18n/integration_xliff2_spec.ts b/packages/compiler/test/i18n/integration_xliff2_spec.ts
index add927a8c1..4c80d1a4ae 100644
--- a/packages/compiler/test/i18n/integration_xliff2_spec.ts
+++ b/packages/compiler/test/i18n/integration_xliff2_spec.ts
@@ -20,7 +20,7 @@ import {SpyResourceLoader} from '../spies';
 
 import {FrLocalization, HTML, I18nComponent, validateHtml} from './integration_common';
 
-export function main() {
+{
   describe('i18n XLIFF 2.0 integration spec', () => {
 
     beforeEach(async(() => {
diff --git a/packages/compiler/test/i18n/integration_xliff_spec.ts b/packages/compiler/test/i18n/integration_xliff_spec.ts
index 7355fff485..dbe823e6f3 100644
--- a/packages/compiler/test/i18n/integration_xliff_spec.ts
+++ b/packages/compiler/test/i18n/integration_xliff_spec.ts
@@ -20,7 +20,7 @@ import {SpyResourceLoader} from '../spies';
 
 import {FrLocalization, HTML, I18nComponent, validateHtml} from './integration_common';
 
-export function main() {
+{
   describe('i18n XLIFF integration spec', () => {
 
     beforeEach(async(() => {
diff --git a/packages/compiler/test/i18n/integration_xmb_xtb_spec.ts b/packages/compiler/test/i18n/integration_xmb_xtb_spec.ts
index 88f249a346..ee85887e68 100644
--- a/packages/compiler/test/i18n/integration_xmb_xtb_spec.ts
+++ b/packages/compiler/test/i18n/integration_xmb_xtb_spec.ts
@@ -20,7 +20,7 @@ import {SpyResourceLoader} from '../spies';
 
 import {FrLocalization, HTML, I18nComponent, validateHtml} from './integration_common';
 
-export function main() {
+{
   describe('i18n XMB/XTB integration spec', () => {
 
     beforeEach(async(() => {
diff --git a/packages/compiler/test/i18n/message_bundle_spec.ts b/packages/compiler/test/i18n/message_bundle_spec.ts
index cae03595bd..ef9cbde561 100644
--- a/packages/compiler/test/i18n/message_bundle_spec.ts
+++ b/packages/compiler/test/i18n/message_bundle_spec.ts
@@ -13,7 +13,7 @@ import {Serializer} from '../../src/i18n/serializers/serializer';
 import {HtmlParser} from '../../src/ml_parser/html_parser';
 import {DEFAULT_INTERPOLATION_CONFIG} from '../../src/ml_parser/interpolation_config';
 
-export function main(): void {
+{
   describe('MessageBundle', () => {
     describe('Messages', () => {
       let messages: MessageBundle;
diff --git a/packages/compiler/test/i18n/serializers/i18n_ast_spec.ts b/packages/compiler/test/i18n/serializers/i18n_ast_spec.ts
index abc5f370d5..3edf6951a5 100644
--- a/packages/compiler/test/i18n/serializers/i18n_ast_spec.ts
+++ b/packages/compiler/test/i18n/serializers/i18n_ast_spec.ts
@@ -11,7 +11,7 @@ import * as i18n from '@angular/compiler/src/i18n/i18n_ast';
 import {serializeNodes} from '../../../src/i18n/digest';
 import {_extractMessages} from '../i18n_parser_spec';
 
-export function main(): void {
+{
   describe('i18n AST', () => {
     describe('CloneVisitor', () => {
       it('should clone an AST', () => {
diff --git a/packages/compiler/test/i18n/serializers/placeholder_spec.ts b/packages/compiler/test/i18n/serializers/placeholder_spec.ts
index eb068695c0..e3aa205d17 100644
--- a/packages/compiler/test/i18n/serializers/placeholder_spec.ts
+++ b/packages/compiler/test/i18n/serializers/placeholder_spec.ts
@@ -8,7 +8,7 @@
 
 import {PlaceholderRegistry} from '../../../src/i18n/serializers/placeholder';
 
-export function main(): void {
+{
   describe('PlaceholderRegistry', () => {
     let reg: PlaceholderRegistry;
 
diff --git a/packages/compiler/test/i18n/serializers/xliff2_spec.ts b/packages/compiler/test/i18n/serializers/xliff2_spec.ts
index 2ed9c998ab..1c934a13e8 100644
--- a/packages/compiler/test/i18n/serializers/xliff2_spec.ts
+++ b/packages/compiler/test/i18n/serializers/xliff2_spec.ts
@@ -242,7 +242,7 @@ lignes</target>
 </xliff>
 `;
 
-export function main(): void {
+(function(){
   const serializer = new Xliff2();
 
   function toXliff(html: string, locale: string | null = null): string {
@@ -413,4 +413,4 @@ lignes`
       });
     });
   });
-}
+})();
diff --git a/packages/compiler/test/i18n/serializers/xliff_spec.ts b/packages/compiler/test/i18n/serializers/xliff_spec.ts
index c5f6a2c128..623f98f9b2 100644
--- a/packages/compiler/test/i18n/serializers/xliff_spec.ts
+++ b/packages/compiler/test/i18n/serializers/xliff_spec.ts
@@ -226,7 +226,7 @@ lignes</target>
 </xliff>
 `;
 
-export function main(): void {
+(function(){
   const serializer = new Xliff();
 
   function toXliff(html: string, locale: string | null = null): string {
@@ -381,4 +381,4 @@ lignes`
       });
     });
   });
-}
+})();
diff --git a/packages/compiler/test/i18n/serializers/xmb_spec.ts b/packages/compiler/test/i18n/serializers/xmb_spec.ts
index a65678e997..45d0bc6450 100644
--- a/packages/compiler/test/i18n/serializers/xmb_spec.ts
+++ b/packages/compiler/test/i18n/serializers/xmb_spec.ts
@@ -11,7 +11,7 @@ import {Xmb} from '@angular/compiler/src/i18n/serializers/xmb';
 import {HtmlParser} from '@angular/compiler/src/ml_parser/html_parser';
 import {DEFAULT_INTERPOLATION_CONFIG} from '@angular/compiler/src/ml_parser/interpolation_config';
 
-export function main(): void {
+{
   describe('XMB serializer', () => {
     const HTML = `
 <p>not translatable</p>
diff --git a/packages/compiler/test/i18n/serializers/xml_helper_spec.ts b/packages/compiler/test/i18n/serializers/xml_helper_spec.ts
index e1f9215b4d..d8e4016048 100644
--- a/packages/compiler/test/i18n/serializers/xml_helper_spec.ts
+++ b/packages/compiler/test/i18n/serializers/xml_helper_spec.ts
@@ -8,7 +8,7 @@
 
 import * as xml from '../../../src/i18n/serializers/xml_helper';
 
-export function main(): void {
+{
   describe('XML helper', () => {
     it('should serialize XML declaration', () => {
       expect(xml.serialize([new xml.Declaration({version: '1.0'})]))
diff --git a/packages/compiler/test/i18n/serializers/xtb_spec.ts b/packages/compiler/test/i18n/serializers/xtb_spec.ts
index c4557d741d..d162fc9739 100644
--- a/packages/compiler/test/i18n/serializers/xtb_spec.ts
+++ b/packages/compiler/test/i18n/serializers/xtb_spec.ts
@@ -12,7 +12,7 @@ import * as i18n from '../../../src/i18n/i18n_ast';
 import {Xtb} from '../../../src/i18n/serializers/xtb';
 
 
-export function main(): void {
+{
   describe('XTB serializer', () => {
     const serializer = new Xtb();
 
diff --git a/packages/compiler/test/i18n/translation_bundle_spec.ts b/packages/compiler/test/i18n/translation_bundle_spec.ts
index 1a78e89d2b..6da0e99456 100644
--- a/packages/compiler/test/i18n/translation_bundle_spec.ts
+++ b/packages/compiler/test/i18n/translation_bundle_spec.ts
@@ -14,7 +14,7 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
 import {serializeNodes} from '../ml_parser/ast_serializer_spec';
 import {_extractMessages} from './i18n_parser_spec';
 
-export function main(): void {
+{
   describe('TranslationBundle', () => {
     const file = new ParseSourceFile('content', 'url');
     const startLocation = new ParseLocation(file, 0, 0, 0);
diff --git a/packages/compiler/test/integration_spec.ts b/packages/compiler/test/integration_spec.ts
index 321b37c0d9..34587b2ac1 100644
--- a/packages/compiler/test/integration_spec.ts
+++ b/packages/compiler/test/integration_spec.ts
@@ -12,7 +12,7 @@ import {By} from '@angular/platform-browser/src/dom/debug/by';
 import {browserDetection} from '@angular/platform-browser/testing/src/browser_util';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('integration tests', () => {
     let fixture: ComponentFixture<TestComponent>;
 
diff --git a/packages/compiler/test/metadata_resolver_spec.ts b/packages/compiler/test/metadata_resolver_spec.ts
index 313d95c7d6..2ef89defb0 100644
--- a/packages/compiler/test/metadata_resolver_spec.ts
+++ b/packages/compiler/test/metadata_resolver_spec.ts
@@ -18,7 +18,7 @@ import {MockResourceLoader} from '../testing/src/resource_loader_mock';
 import {MalformedStylesComponent} from './metadata_resolver_fixture';
 import {TEST_COMPILER_PROVIDERS} from './test_bindings';
 
-export function main() {
+{
   describe('CompileMetadataResolver', () => {
     beforeEach(() => { TestBed.configureCompiler({providers: TEST_COMPILER_PROVIDERS}); });
 
diff --git a/packages/compiler/test/ml_parser/ast_serializer_spec.ts b/packages/compiler/test/ml_parser/ast_serializer_spec.ts
index 5e33a302d5..2c0fb98700 100644
--- a/packages/compiler/test/ml_parser/ast_serializer_spec.ts
+++ b/packages/compiler/test/ml_parser/ast_serializer_spec.ts
@@ -10,7 +10,7 @@ import * as html from '@angular/compiler/src/ml_parser/ast';
 import {HtmlParser} from '@angular/compiler/src/ml_parser/html_parser';
 import {getHtmlTagDefinition} from '@angular/compiler/src/ml_parser/html_tags';
 
-export function main() {
+{
   describe('Node serializer', () => {
     let parser: HtmlParser;
 
diff --git a/packages/compiler/test/ml_parser/html_parser_spec.ts b/packages/compiler/test/ml_parser/html_parser_spec.ts
index 837ec0ebb0..bb35da8cb7 100644
--- a/packages/compiler/test/ml_parser/html_parser_spec.ts
+++ b/packages/compiler/test/ml_parser/html_parser_spec.ts
@@ -13,7 +13,7 @@ import {ParseError} from '../../src/parse_util';
 
 import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spec_utils';
 
-export function main() {
+{
   describe('HtmlParser', () => {
     let parser: HtmlParser;
 
diff --git a/packages/compiler/test/ml_parser/html_whitespaces_spec.ts b/packages/compiler/test/ml_parser/html_whitespaces_spec.ts
index bb7c9a8470..8da5898353 100644
--- a/packages/compiler/test/ml_parser/html_whitespaces_spec.ts
+++ b/packages/compiler/test/ml_parser/html_whitespaces_spec.ts
@@ -12,7 +12,7 @@ import {PRESERVE_WS_ATTR_NAME, removeWhitespaces} from '../../src/ml_parser/html
 
 import {humanizeDom} from './ast_spec_utils';
 
-export function main() {
+{
   describe('removeWhitespaces', () => {
 
     function parseAndRemoveWS(template: string): any[] {
diff --git a/packages/compiler/test/ml_parser/icu_ast_expander_spec.ts b/packages/compiler/test/ml_parser/icu_ast_expander_spec.ts
index 43e71f1102..992675b9b9 100644
--- a/packages/compiler/test/ml_parser/icu_ast_expander_spec.ts
+++ b/packages/compiler/test/ml_parser/icu_ast_expander_spec.ts
@@ -13,7 +13,7 @@ import {ParseError} from '../../src/parse_util';
 
 import {humanizeNodes} from './ast_spec_utils';
 
-export function main() {
+{
   describe('Expander', () => {
     function expand(template: string): ExpansionResult {
       const htmlParser = new HtmlParser();
diff --git a/packages/compiler/test/ml_parser/lexer_spec.ts b/packages/compiler/test/ml_parser/lexer_spec.ts
index 5c53668298..f2fe62a1d5 100644
--- a/packages/compiler/test/ml_parser/lexer_spec.ts
+++ b/packages/compiler/test/ml_parser/lexer_spec.ts
@@ -11,7 +11,7 @@ import {InterpolationConfig} from '../../src/ml_parser/interpolation_config';
 import * as lex from '../../src/ml_parser/lexer';
 import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_util';
 
-export function main() {
+{
   describe('HtmlLexer', () => {
     describe('line/column numbers', () => {
       it('should work without newlines', () => {
diff --git a/packages/compiler/test/ng_module_resolver_mock_spec.ts b/packages/compiler/test/ng_module_resolver_mock_spec.ts
index adf792edde..00a2df52cc 100644
--- a/packages/compiler/test/ng_module_resolver_mock_spec.ts
+++ b/packages/compiler/test/ng_module_resolver_mock_spec.ts
@@ -12,7 +12,7 @@ import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_refle
 
 import {MockNgModuleResolver} from '../testing';
 
-export function main() {
+{
   describe('MockNgModuleResolver', () => {
     let ngModuleResolver: MockNgModuleResolver;
 
diff --git a/packages/compiler/test/ng_module_resolver_spec.ts b/packages/compiler/test/ng_module_resolver_spec.ts
index c56dfc1ec2..d9b019c520 100644
--- a/packages/compiler/test/ng_module_resolver_spec.ts
+++ b/packages/compiler/test/ng_module_resolver_spec.ts
@@ -29,7 +29,7 @@ class SomeModule {
 
 class SimpleClass {}
 
-export function main() {
+{
   describe('NgModuleResolver', () => {
     let resolver: NgModuleResolver;
 
diff --git a/packages/compiler/test/output/abstract_emitter_node_only_spec.ts b/packages/compiler/test/output/abstract_emitter_node_only_spec.ts
index d0f976e632..affabdad26 100644
--- a/packages/compiler/test/output/abstract_emitter_node_only_spec.ts
+++ b/packages/compiler/test/output/abstract_emitter_node_only_spec.ts
@@ -11,7 +11,7 @@ import {EmitterVisitorContext} from '@angular/compiler/src/output/abstract_emitt
 import {SourceMap} from '@angular/compiler/src/output/source_map';
 import {extractSourceMap, originalPositionFor} from '@angular/compiler/testing/src/output/source_map_util';
 
-export function main() {
+{
   describe('AbstractEmitter', () => {
     describe('EmitterVisitorContext', () => {
       const fileA = new ParseSourceFile('a0a1a2a3a4a5a6a7a8a9', 'a.js');
diff --git a/packages/compiler/test/output/abstract_emitter_spec.ts b/packages/compiler/test/output/abstract_emitter_spec.ts
index 7f091a3d3a..d28b439ff1 100644
--- a/packages/compiler/test/output/abstract_emitter_spec.ts
+++ b/packages/compiler/test/output/abstract_emitter_spec.ts
@@ -8,7 +8,7 @@
 
 import {escapeIdentifier} from '@angular/compiler/src/output/abstract_emitter';
 
-export function main() {
+{
   describe('AbstractEmitter', () => {
     describe('escapeIdentifier', () => {
       it('should escape single quotes',
diff --git a/packages/compiler/test/output/js_emitter_node_only_spec.ts b/packages/compiler/test/output/js_emitter_node_only_spec.ts
index 03a689fb72..1ec2bb4e3c 100644
--- a/packages/compiler/test/output/js_emitter_node_only_spec.ts
+++ b/packages/compiler/test/output/js_emitter_node_only_spec.ts
@@ -17,7 +17,7 @@ import {extractSourceMap, originalPositionFor} from '@angular/compiler/testing/s
 
 const someGenFilePath = 'somePackage/someGenFile';
 
-export function main() {
+{
   describe('JavaScriptEmitter', () => {
     let emitter: JavaScriptEmitter;
     let someVar: o.ReadVarExpr;
diff --git a/packages/compiler/test/output/js_emitter_spec.ts b/packages/compiler/test/output/js_emitter_spec.ts
index a336eba6dc..184cb615e9 100644
--- a/packages/compiler/test/output/js_emitter_spec.ts
+++ b/packages/compiler/test/output/js_emitter_spec.ts
@@ -19,7 +19,7 @@ const sameModuleIdentifier = new o.ExternalReference(null, 'someLocalId', null);
 
 const externalModuleIdentifier = new o.ExternalReference(anotherModuleUrl, 'someExternalId', null);
 
-export function main() {
+{
   // Note supported features of our OutputAstin JavaScript / ES5:
   // - types
   // - declaring fields
diff --git a/packages/compiler/test/output/output_ast_spec.ts b/packages/compiler/test/output/output_ast_spec.ts
index f21895533c..5e03c617f5 100644
--- a/packages/compiler/test/output/output_ast_spec.ts
+++ b/packages/compiler/test/output/output_ast_spec.ts
@@ -8,7 +8,7 @@
 
 import * as o from '../../src/output/output_ast';
 
-export function main() {
+{
   describe('OutputAst', () => {
     describe('collectExternalReferences', () => {
       it('should find expressions of variable types', () => {
diff --git a/packages/compiler/test/output/output_jit_spec.ts b/packages/compiler/test/output/output_jit_spec.ts
index 5587d4109a..ccdeed559f 100644
--- a/packages/compiler/test/output/output_jit_spec.ts
+++ b/packages/compiler/test/output/output_jit_spec.ts
@@ -13,7 +13,7 @@ import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_refle
 
 const anotherModuleUrl = 'somePackage/someOtherPath';
 
-export function main() {
+{
   describe('Output JIT', () => {
     describe('regression', () => {
       it('should generate unique argument names', () => {
diff --git a/packages/compiler/test/output/source_map_spec.ts b/packages/compiler/test/output/source_map_spec.ts
index b80af659b6..ea76893e11 100644
--- a/packages/compiler/test/output/source_map_spec.ts
+++ b/packages/compiler/test/output/source_map_spec.ts
@@ -8,7 +8,7 @@
 
 import {SourceMapGenerator, toBase64String} from '@angular/compiler/src/output/source_map';
 
-export function main() {
+{
   describe('source map generation', () => {
     describe('generation', () => {
       it('should generate a valid source map', () => {
diff --git a/packages/compiler/test/output/ts_emitter_node_only_spec.ts b/packages/compiler/test/output/ts_emitter_node_only_spec.ts
index b1dbabc82b..b1ce420096 100644
--- a/packages/compiler/test/output/ts_emitter_node_only_spec.ts
+++ b/packages/compiler/test/output/ts_emitter_node_only_spec.ts
@@ -17,7 +17,7 @@ import {extractSourceMap, originalPositionFor} from '@angular/compiler/testing/s
 
 const someGenFilePath = 'somePackage/someGenFile';
 
-export function main() {
+{
   // Not supported features of our OutputAst in TS:
   // - real `const` like in Dart
   // - final fields
diff --git a/packages/compiler/test/output/ts_emitter_spec.ts b/packages/compiler/test/output/ts_emitter_spec.ts
index ba5b86c0bb..cc64344e9a 100644
--- a/packages/compiler/test/output/ts_emitter_spec.ts
+++ b/packages/compiler/test/output/ts_emitter_spec.ts
@@ -19,7 +19,7 @@ const sameModuleIdentifier = new o.ExternalReference(null, 'someLocalId', null);
 
 const externalModuleIdentifier = new o.ExternalReference(anotherModuleUrl, 'someExternalId', null);
 
-export function main() {
+{
   // Not supported features of our OutputAst in TS:
   // - real `const` like in Dart
   // - final fields
diff --git a/packages/compiler/test/parse_util_spec.ts b/packages/compiler/test/parse_util_spec.ts
index 9c9ce43f0b..87420ea83d 100644
--- a/packages/compiler/test/parse_util_spec.ts
+++ b/packages/compiler/test/parse_util_spec.ts
@@ -8,7 +8,7 @@
 
 import {ParseError, ParseErrorLevel, ParseLocation, ParseSourceFile, ParseSourceSpan} from '../src/parse_util';
 
-export function main() {
+{
   describe('ParseError', () => {
     it('should reflect the level in the message', () => {
       const file = new ParseSourceFile(`foo\nbar\nfoo`, 'url');
diff --git a/packages/compiler/test/pipe_resolver_mock_spec.ts b/packages/compiler/test/pipe_resolver_mock_spec.ts
index 4db3e71a6b..d7ae2ee6c1 100644
--- a/packages/compiler/test/pipe_resolver_mock_spec.ts
+++ b/packages/compiler/test/pipe_resolver_mock_spec.ts
@@ -12,7 +12,7 @@ import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_refle
 
 import {MockPipeResolver} from '../testing';
 
-export function main() {
+{
   describe('MockPipeResolver', () => {
     let pipeResolver: MockPipeResolver;
 
diff --git a/packages/compiler/test/pipe_resolver_spec.ts b/packages/compiler/test/pipe_resolver_spec.ts
index 2e5285c823..e338973107 100644
--- a/packages/compiler/test/pipe_resolver_spec.ts
+++ b/packages/compiler/test/pipe_resolver_spec.ts
@@ -17,7 +17,7 @@ class SomePipe {
 
 class SimpleClass {}
 
-export function main() {
+{
   describe('PipeResolver', () => {
     let resolver: PipeResolver;
 
diff --git a/packages/compiler/test/resource_loader_mock_spec.ts b/packages/compiler/test/resource_loader_mock_spec.ts
index ea23a9bb45..760ff5fce0 100644
--- a/packages/compiler/test/resource_loader_mock_spec.ts
+++ b/packages/compiler/test/resource_loader_mock_spec.ts
@@ -9,7 +9,7 @@
 import {MockResourceLoader} from '@angular/compiler/testing/src/resource_loader_mock';
 import {AsyncTestCompleter, beforeEach, describe, expect, inject, it} from '@angular/core/testing/src/testing_internal';
 
-export function main() {
+{
   describe('MockResourceLoader', () => {
     let resourceLoader: MockResourceLoader;
 
diff --git a/packages/compiler/test/runtime_compiler_spec.ts b/packages/compiler/test/runtime_compiler_spec.ts
index 73bedc3d05..47423395bd 100644
--- a/packages/compiler/test/runtime_compiler_spec.ts
+++ b/packages/compiler/test/runtime_compiler_spec.ts
@@ -25,7 +25,7 @@ class SomeComp {
 class SomeCompWithUrlTemplate {
 }
 
-export function main() {
+{
   describe('RuntimeCompiler', () => {
 
     describe('compilerComponentSync', () => {
diff --git a/packages/compiler/test/schema/dom_element_schema_registry_spec.ts b/packages/compiler/test/schema/dom_element_schema_registry_spec.ts
index 8d8a0d77cf..7c6b98c67c 100644
--- a/packages/compiler/test/schema/dom_element_schema_registry_spec.ts
+++ b/packages/compiler/test/schema/dom_element_schema_registry_spec.ts
@@ -16,7 +16,7 @@ import {HtmlParser} from '../../src/ml_parser/html_parser';
 
 import {extractSchema} from './schema_extractor';
 
-export function main() {
+{
   describe('DOMElementSchema', () => {
     let registry: DomElementSchemaRegistry;
     beforeEach(() => { registry = new DomElementSchemaRegistry(); });
diff --git a/packages/compiler/test/selector_spec.ts b/packages/compiler/test/selector_spec.ts
index 05faa849cc..8b5e64a378 100644
--- a/packages/compiler/test/selector_spec.ts
+++ b/packages/compiler/test/selector_spec.ts
@@ -10,7 +10,7 @@ import {CssSelector, SelectorMatcher} from '@angular/compiler/src/selector';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {el} from '@angular/platform-browser/testing/src/browser_util';
 
-export function main() {
+{
   describe('SelectorMatcher', () => {
     let matcher: SelectorMatcher;
     let selectableCollector: (selector: CssSelector, context: any) => void;
diff --git a/packages/compiler/test/shadow_css_spec.ts b/packages/compiler/test/shadow_css_spec.ts
index 75c209cb61..646e8658a5 100644
--- a/packages/compiler/test/shadow_css_spec.ts
+++ b/packages/compiler/test/shadow_css_spec.ts
@@ -9,7 +9,7 @@
 import {CssRule, ShadowCss, processRules} from '@angular/compiler/src/shadow_css';
 import {normalizeCSS} from '@angular/platform-browser/testing/src/browser_util';
 
-export function main() {
+{
   describe('ShadowCss', function() {
 
     function s(css: string, contentAttr: string, hostAttr: string = '') {
diff --git a/packages/compiler/test/style_url_resolver_spec.ts b/packages/compiler/test/style_url_resolver_spec.ts
index 251380768a..ef8aebdb5c 100644
--- a/packages/compiler/test/style_url_resolver_spec.ts
+++ b/packages/compiler/test/style_url_resolver_spec.ts
@@ -9,7 +9,7 @@
 import {extractStyleUrls, isStyleUrlResolvable} from '@angular/compiler/src/style_url_resolver';
 import {UrlResolver} from '@angular/compiler/src/url_resolver';
 
-export function main() {
+{
   describe('extractStyleUrls', () => {
     let urlResolver: UrlResolver;
 
diff --git a/packages/compiler/test/template_parser/binding_parser_spec.ts b/packages/compiler/test/template_parser/binding_parser_spec.ts
index 50c1991ce4..77656c6bc4 100644
--- a/packages/compiler/test/template_parser/binding_parser_spec.ts
+++ b/packages/compiler/test/template_parser/binding_parser_spec.ts
@@ -12,7 +12,7 @@ import {inject} from '@angular/core/testing';
 import {ElementSchemaRegistry} from '../../src/schema/element_schema_registry';
 import {calcPossibleSecurityContexts} from '../../src/template_parser/binding_parser';
 
-export function main() {
+{
   describe('BindingParser', () => {
     let registry: ElementSchemaRegistry;
 
diff --git a/packages/compiler/test/template_parser/template_parser_spec.ts b/packages/compiler/test/template_parser/template_parser_spec.ts
index 950a79cf3d..cffdbbf8a5 100644
--- a/packages/compiler/test/template_parser/template_parser_spec.ts
+++ b/packages/compiler/test/template_parser/template_parser_spec.ts
@@ -116,8 +116,214 @@ function compileTemplateMetadata({encapsulation, template, templateUrl, styles,
 }
 
 
+function humanizeTplAst(
+    templateAsts: TemplateAst[], interpolationConfig?: InterpolationConfig): any[] {
+  const humanizer = new TemplateHumanizer(false, interpolationConfig);
+  templateVisitAll(humanizer, templateAsts);
+  return humanizer.result;
+}
 
-export function main() {
+function humanizeTplAstSourceSpans(
+    templateAsts: TemplateAst[], interpolationConfig?: InterpolationConfig): any[] {
+  const humanizer = new TemplateHumanizer(true, interpolationConfig);
+  templateVisitAll(humanizer, templateAsts);
+  return humanizer.result;
+}
+
+class TemplateHumanizer implements TemplateAstVisitor {
+  result: any[] = [];
+
+  constructor(
+      private includeSourceSpan: boolean,
+      private interpolationConfig: InterpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {}
+
+  visitNgContent(ast: NgContentAst, context: any): any {
+    const res = [NgContentAst];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {
+    const res = [EmbeddedTemplateAst];
+    this.result.push(this._appendContext(ast, res));
+    templateVisitAll(this, ast.attrs);
+    templateVisitAll(this, ast.outputs);
+    templateVisitAll(this, ast.references);
+    templateVisitAll(this, ast.variables);
+    templateVisitAll(this, ast.directives);
+    templateVisitAll(this, ast.children);
+    return null;
+  }
+  visitElement(ast: ElementAst, context: any): any {
+    const res = [ElementAst, ast.name];
+    this.result.push(this._appendContext(ast, res));
+    templateVisitAll(this, ast.attrs);
+    templateVisitAll(this, ast.inputs);
+    templateVisitAll(this, ast.outputs);
+    templateVisitAll(this, ast.references);
+    templateVisitAll(this, ast.directives);
+    templateVisitAll(this, ast.children);
+    return null;
+  }
+  visitReference(ast: ReferenceAst, context: any): any {
+    const res = [ReferenceAst, ast.name, ast.value];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitVariable(ast: VariableAst, context: any): any {
+    const res = [VariableAst, ast.name, ast.value];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitEvent(ast: BoundEventAst, context: any): any {
+    const res =
+        [BoundEventAst, ast.name, ast.target, unparse(ast.handler, this.interpolationConfig)];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitElementProperty(ast: BoundElementPropertyAst, context: any): any {
+    const res = [
+      BoundElementPropertyAst, ast.type, ast.name, unparse(ast.value, this.interpolationConfig),
+      ast.unit
+    ];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitAttr(ast: AttrAst, context: any): any {
+    const res = [AttrAst, ast.name, ast.value];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitBoundText(ast: BoundTextAst, context: any): any {
+    const res = [BoundTextAst, unparse(ast.value, this.interpolationConfig)];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitText(ast: TextAst, context: any): any {
+    const res = [TextAst, ast.value];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+  visitDirective(ast: DirectiveAst, context: any): any {
+    const res = [DirectiveAst, ast.directive];
+    this.result.push(this._appendContext(ast, res));
+    templateVisitAll(this, ast.inputs);
+    templateVisitAll(this, ast.hostProperties);
+    templateVisitAll(this, ast.hostEvents);
+    return null;
+  }
+  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {
+    const res = [
+      BoundDirectivePropertyAst, ast.directiveName, unparse(ast.value, this.interpolationConfig)
+    ];
+    this.result.push(this._appendContext(ast, res));
+    return null;
+  }
+
+  private _appendContext(ast: TemplateAst, input: any[]): any[] {
+    if (!this.includeSourceSpan) return input;
+    input.push(ast.sourceSpan !.toString());
+    return input;
+  }
+}
+
+function humanizeContentProjection(templateAsts: TemplateAst[]): any[] {
+  const humanizer = new TemplateContentProjectionHumanizer();
+  templateVisitAll(humanizer, templateAsts);
+  return humanizer.result;
+}
+
+class TemplateContentProjectionHumanizer implements TemplateAstVisitor {
+  result: any[] = [];
+  visitNgContent(ast: NgContentAst, context: any): any {
+    this.result.push(['ng-content', ast.ngContentIndex]);
+    return null;
+  }
+  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {
+    this.result.push(['template', ast.ngContentIndex]);
+    templateVisitAll(this, ast.children);
+    return null;
+  }
+  visitElement(ast: ElementAst, context: any): any {
+    this.result.push([ast.name, ast.ngContentIndex]);
+    templateVisitAll(this, ast.children);
+    return null;
+  }
+  visitReference(ast: ReferenceAst, context: any): any { return null; }
+  visitVariable(ast: VariableAst, context: any): any { return null; }
+  visitEvent(ast: BoundEventAst, context: any): any { return null; }
+  visitElementProperty(ast: BoundElementPropertyAst, context: any): any { return null; }
+  visitAttr(ast: AttrAst, context: any): any { return null; }
+  visitBoundText(ast: BoundTextAst, context: any): any {
+    this.result.push([`#text(${unparse(ast.value)})`, ast.ngContentIndex]);
+    return null;
+  }
+  visitText(ast: TextAst, context: any): any {
+    this.result.push([`#text(${ast.value})`, ast.ngContentIndex]);
+    return null;
+  }
+  visitDirective(ast: DirectiveAst, context: any): any { return null; }
+  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any { return null; }
+}
+
+class ThrowingVisitor implements TemplateAstVisitor {
+  visitNgContent(ast: NgContentAst, context: any): any { throw 'not implemented'; }
+  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any { throw 'not implemented'; }
+  visitElement(ast: ElementAst, context: any): any { throw 'not implemented'; }
+  visitReference(ast: ReferenceAst, context: any): any { throw 'not implemented'; }
+  visitVariable(ast: VariableAst, context: any): any { throw 'not implemented'; }
+  visitEvent(ast: BoundEventAst, context: any): any { throw 'not implemented'; }
+  visitElementProperty(ast: BoundElementPropertyAst, context: any): any { throw 'not implemented'; }
+  visitAttr(ast: AttrAst, context: any): any { throw 'not implemented'; }
+  visitBoundText(ast: BoundTextAst, context: any): any { throw 'not implemented'; }
+  visitText(ast: TextAst, context: any): any { throw 'not implemented'; }
+  visitDirective(ast: DirectiveAst, context: any): any { throw 'not implemented'; }
+  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {
+    throw 'not implemented';
+  }
+}
+
+class FooAstTransformer extends ThrowingVisitor {
+  visitElement(ast: ElementAst, context: any): any {
+    if (ast.name != 'div') return ast;
+    return new ElementAst(
+        'foo', [], [], [], [], [], [], false, [], [], ast.ngContentIndex, ast.sourceSpan,
+        ast.endSourceSpan);
+  }
+}
+
+class BarAstTransformer extends FooAstTransformer {
+  visitElement(ast: ElementAst, context: any): any {
+    if (ast.name != 'foo') return ast;
+    return new ElementAst(
+        'bar', [], [], [], [], [], [], false, [], [], ast.ngContentIndex, ast.sourceSpan,
+        ast.endSourceSpan);
+  }
+}
+
+class NullVisitor implements TemplateAstVisitor {
+  visitNgContent(ast: NgContentAst, context: any): any {}
+  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {}
+  visitElement(ast: ElementAst, context: any): any {}
+  visitReference(ast: ReferenceAst, context: any): any {}
+  visitVariable(ast: VariableAst, context: any): any {}
+  visitEvent(ast: BoundEventAst, context: any): any {}
+  visitElementProperty(ast: BoundElementPropertyAst, context: any): any {}
+  visitAttr(ast: AttrAst, context: any): any {}
+  visitBoundText(ast: BoundTextAst, context: any): any {}
+  visitText(ast: TextAst, context: any): any {}
+  visitDirective(ast: DirectiveAst, context: any): any {}
+  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {}
+}
+
+class ArrayConsole implements Console {
+  logs: string[] = [];
+  warnings: string[] = [];
+  log(msg: string) { this.logs.push(msg); }
+  warn(msg: string) { this.warnings.push(msg); }
+}
+
+
+(function(){
   let ngIf: CompileDirectiveSummary;
   let parse: (
       template: string, directives: CompileDirectiveSummary[], pipes?: CompilePipeSummary[],
@@ -2179,210 +2385,4 @@ The pipe 'test' could not be found ("{{[ERROR ->]a | test}}"): TestComp@0:2`);
       ]);
     });
   });
-}
-
-function humanizeTplAst(
-    templateAsts: TemplateAst[], interpolationConfig?: InterpolationConfig): any[] {
-  const humanizer = new TemplateHumanizer(false, interpolationConfig);
-  templateVisitAll(humanizer, templateAsts);
-  return humanizer.result;
-}
-
-function humanizeTplAstSourceSpans(
-    templateAsts: TemplateAst[], interpolationConfig?: InterpolationConfig): any[] {
-  const humanizer = new TemplateHumanizer(true, interpolationConfig);
-  templateVisitAll(humanizer, templateAsts);
-  return humanizer.result;
-}
-
-class TemplateHumanizer implements TemplateAstVisitor {
-  result: any[] = [];
-
-  constructor(
-      private includeSourceSpan: boolean,
-      private interpolationConfig: InterpolationConfig = DEFAULT_INTERPOLATION_CONFIG) {}
-
-  visitNgContent(ast: NgContentAst, context: any): any {
-    const res = [NgContentAst];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {
-    const res = [EmbeddedTemplateAst];
-    this.result.push(this._appendContext(ast, res));
-    templateVisitAll(this, ast.attrs);
-    templateVisitAll(this, ast.outputs);
-    templateVisitAll(this, ast.references);
-    templateVisitAll(this, ast.variables);
-    templateVisitAll(this, ast.directives);
-    templateVisitAll(this, ast.children);
-    return null;
-  }
-  visitElement(ast: ElementAst, context: any): any {
-    const res = [ElementAst, ast.name];
-    this.result.push(this._appendContext(ast, res));
-    templateVisitAll(this, ast.attrs);
-    templateVisitAll(this, ast.inputs);
-    templateVisitAll(this, ast.outputs);
-    templateVisitAll(this, ast.references);
-    templateVisitAll(this, ast.directives);
-    templateVisitAll(this, ast.children);
-    return null;
-  }
-  visitReference(ast: ReferenceAst, context: any): any {
-    const res = [ReferenceAst, ast.name, ast.value];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitVariable(ast: VariableAst, context: any): any {
-    const res = [VariableAst, ast.name, ast.value];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitEvent(ast: BoundEventAst, context: any): any {
-    const res =
-        [BoundEventAst, ast.name, ast.target, unparse(ast.handler, this.interpolationConfig)];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitElementProperty(ast: BoundElementPropertyAst, context: any): any {
-    const res = [
-      BoundElementPropertyAst, ast.type, ast.name, unparse(ast.value, this.interpolationConfig),
-      ast.unit
-    ];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitAttr(ast: AttrAst, context: any): any {
-    const res = [AttrAst, ast.name, ast.value];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitBoundText(ast: BoundTextAst, context: any): any {
-    const res = [BoundTextAst, unparse(ast.value, this.interpolationConfig)];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitText(ast: TextAst, context: any): any {
-    const res = [TextAst, ast.value];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-  visitDirective(ast: DirectiveAst, context: any): any {
-    const res = [DirectiveAst, ast.directive];
-    this.result.push(this._appendContext(ast, res));
-    templateVisitAll(this, ast.inputs);
-    templateVisitAll(this, ast.hostProperties);
-    templateVisitAll(this, ast.hostEvents);
-    return null;
-  }
-  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {
-    const res = [
-      BoundDirectivePropertyAst, ast.directiveName, unparse(ast.value, this.interpolationConfig)
-    ];
-    this.result.push(this._appendContext(ast, res));
-    return null;
-  }
-
-  private _appendContext(ast: TemplateAst, input: any[]): any[] {
-    if (!this.includeSourceSpan) return input;
-    input.push(ast.sourceSpan !.toString());
-    return input;
-  }
-}
-
-function humanizeContentProjection(templateAsts: TemplateAst[]): any[] {
-  const humanizer = new TemplateContentProjectionHumanizer();
-  templateVisitAll(humanizer, templateAsts);
-  return humanizer.result;
-}
-
-class TemplateContentProjectionHumanizer implements TemplateAstVisitor {
-  result: any[] = [];
-  visitNgContent(ast: NgContentAst, context: any): any {
-    this.result.push(['ng-content', ast.ngContentIndex]);
-    return null;
-  }
-  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {
-    this.result.push(['template', ast.ngContentIndex]);
-    templateVisitAll(this, ast.children);
-    return null;
-  }
-  visitElement(ast: ElementAst, context: any): any {
-    this.result.push([ast.name, ast.ngContentIndex]);
-    templateVisitAll(this, ast.children);
-    return null;
-  }
-  visitReference(ast: ReferenceAst, context: any): any { return null; }
-  visitVariable(ast: VariableAst, context: any): any { return null; }
-  visitEvent(ast: BoundEventAst, context: any): any { return null; }
-  visitElementProperty(ast: BoundElementPropertyAst, context: any): any { return null; }
-  visitAttr(ast: AttrAst, context: any): any { return null; }
-  visitBoundText(ast: BoundTextAst, context: any): any {
-    this.result.push([`#text(${unparse(ast.value)})`, ast.ngContentIndex]);
-    return null;
-  }
-  visitText(ast: TextAst, context: any): any {
-    this.result.push([`#text(${ast.value})`, ast.ngContentIndex]);
-    return null;
-  }
-  visitDirective(ast: DirectiveAst, context: any): any { return null; }
-  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any { return null; }
-}
-
-class ThrowingVisitor implements TemplateAstVisitor {
-  visitNgContent(ast: NgContentAst, context: any): any { throw 'not implemented'; }
-  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any { throw 'not implemented'; }
-  visitElement(ast: ElementAst, context: any): any { throw 'not implemented'; }
-  visitReference(ast: ReferenceAst, context: any): any { throw 'not implemented'; }
-  visitVariable(ast: VariableAst, context: any): any { throw 'not implemented'; }
-  visitEvent(ast: BoundEventAst, context: any): any { throw 'not implemented'; }
-  visitElementProperty(ast: BoundElementPropertyAst, context: any): any { throw 'not implemented'; }
-  visitAttr(ast: AttrAst, context: any): any { throw 'not implemented'; }
-  visitBoundText(ast: BoundTextAst, context: any): any { throw 'not implemented'; }
-  visitText(ast: TextAst, context: any): any { throw 'not implemented'; }
-  visitDirective(ast: DirectiveAst, context: any): any { throw 'not implemented'; }
-  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {
-    throw 'not implemented';
-  }
-}
-
-class FooAstTransformer extends ThrowingVisitor {
-  visitElement(ast: ElementAst, context: any): any {
-    if (ast.name != 'div') return ast;
-    return new ElementAst(
-        'foo', [], [], [], [], [], [], false, [], [], ast.ngContentIndex, ast.sourceSpan,
-        ast.endSourceSpan);
-  }
-}
-
-class BarAstTransformer extends FooAstTransformer {
-  visitElement(ast: ElementAst, context: any): any {
-    if (ast.name != 'foo') return ast;
-    return new ElementAst(
-        'bar', [], [], [], [], [], [], false, [], [], ast.ngContentIndex, ast.sourceSpan,
-        ast.endSourceSpan);
-  }
-}
-
-class NullVisitor implements TemplateAstVisitor {
-  visitNgContent(ast: NgContentAst, context: any): any {}
-  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {}
-  visitElement(ast: ElementAst, context: any): any {}
-  visitReference(ast: ReferenceAst, context: any): any {}
-  visitVariable(ast: VariableAst, context: any): any {}
-  visitEvent(ast: BoundEventAst, context: any): any {}
-  visitElementProperty(ast: BoundElementPropertyAst, context: any): any {}
-  visitAttr(ast: AttrAst, context: any): any {}
-  visitBoundText(ast: BoundTextAst, context: any): any {}
-  visitText(ast: TextAst, context: any): any {}
-  visitDirective(ast: DirectiveAst, context: any): any {}
-  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any {}
-}
-
-class ArrayConsole implements Console {
-  logs: string[] = [];
-  warnings: string[] = [];
-  log(msg: string) { this.logs.push(msg); }
-  warn(msg: string) { this.warnings.push(msg); }
-}
+})();
diff --git a/packages/compiler/test/template_parser/template_preparser_spec.ts b/packages/compiler/test/template_parser/template_preparser_spec.ts
index 6325fe216e..a5fd041632 100644
--- a/packages/compiler/test/template_parser/template_preparser_spec.ts
+++ b/packages/compiler/test/template_parser/template_preparser_spec.ts
@@ -11,7 +11,7 @@ import {Element} from '../../src/ml_parser/ast';
 import {HtmlParser} from '../../src/ml_parser/html_parser';
 import {PreparsedElement, PreparsedElementType, preparseElement} from '../../src/template_parser/template_preparser';
 
-export function main() {
+{
   describe('preparseElement', () => {
     let htmlParser: HtmlParser;
     beforeEach(inject([HtmlParser], (_htmlParser: HtmlParser) => { htmlParser = _htmlParser; }));
diff --git a/packages/compiler/test/url_resolver_spec.ts b/packages/compiler/test/url_resolver_spec.ts
index 67b693c1fe..c6dc97c8a3 100644
--- a/packages/compiler/test/url_resolver_spec.ts
+++ b/packages/compiler/test/url_resolver_spec.ts
@@ -9,7 +9,7 @@
 import {UrlResolver, createOfflineCompileUrlResolver} from '@angular/compiler/src/url_resolver';
 import {beforeEach, describe, expect, inject, it} from '@angular/core/testing/src/testing_internal';
 
-export function main() {
+{
   describe('UrlResolver', () => {
     let resolver = new UrlResolver();
 
diff --git a/packages/compiler/test/util_spec.ts b/packages/compiler/test/util_spec.ts
index 149ed6ae1c..188c6c3739 100644
--- a/packages/compiler/test/util_spec.ts
+++ b/packages/compiler/test/util_spec.ts
@@ -9,7 +9,7 @@
 import {fakeAsync} from '@angular/core/testing/src/fake_async';
 import {SyncAsync, escapeRegExp, splitAtColon, utf8Encode} from '../src/util';
 
-export function main() {
+{
   describe('util', () => {
     describe('splitAtColon', () => {
       it('should split when a single ":" is present', () => {
diff --git a/packages/examples/core/di/ts/forward_ref/forward_ref_spec.ts b/packages/examples/core/di/ts/forward_ref/forward_ref_spec.ts
index 89fa1324b3..213c972222 100644
--- a/packages/examples/core/di/ts/forward_ref/forward_ref_spec.ts
+++ b/packages/examples/core/di/ts/forward_ref/forward_ref_spec.ts
@@ -8,7 +8,7 @@
 
 import {Inject, ReflectiveInjector, forwardRef, resolveForwardRef} from '@angular/core';
 
-export function main() {
+{
   describe('forwardRef examples', () => {
     it('ForwardRefFn example works', () => {
       // #docregion forward_ref_fn
diff --git a/packages/examples/core/di/ts/injector_spec.ts b/packages/examples/core/di/ts/injector_spec.ts
index e04d2434f0..ab57f44d0e 100644
--- a/packages/examples/core/di/ts/injector_spec.ts
+++ b/packages/examples/core/di/ts/injector_spec.ts
@@ -8,7 +8,7 @@
 
 import {InjectionToken, Injector, ReflectiveInjector} from '@angular/core';
 
-export function main() {
+{
   describe('injector metadata examples', () => {
     it('works', () => {
       // #docregion Injector
diff --git a/packages/examples/core/di/ts/metadata_spec.ts b/packages/examples/core/di/ts/metadata_spec.ts
index 3d847206dc..635c7033bc 100644
--- a/packages/examples/core/di/ts/metadata_spec.ts
+++ b/packages/examples/core/di/ts/metadata_spec.ts
@@ -9,7 +9,7 @@
 import {Component, Directive, Host, Inject, Injectable, Optional, ReflectiveInjector, Self, SkipSelf} from '@angular/core';
 import {ComponentFixture, TestBed} from '@angular/core/testing';
 
-export function main() {
+{
   describe('di metadata examples', () => {
     describe('Inject', () => {
       it('works', () => {
diff --git a/packages/examples/core/di/ts/provider_spec.ts b/packages/examples/core/di/ts/provider_spec.ts
index e50e36428e..605ec44398 100644
--- a/packages/examples/core/di/ts/provider_spec.ts
+++ b/packages/examples/core/di/ts/provider_spec.ts
@@ -8,7 +8,7 @@
 
 import {Injectable, InjectionToken, Injector, Optional, ReflectiveInjector} from '@angular/core';
 
-export function main() {
+{
   describe('Provider examples', () => {
     describe('TypeProvider', () => {
       it('works', () => {
diff --git a/packages/examples/core/ts/metadata/lifecycle_hooks_spec.ts b/packages/examples/core/ts/metadata/lifecycle_hooks_spec.ts
index 479ba04337..30186709d9 100644
--- a/packages/examples/core/ts/metadata/lifecycle_hooks_spec.ts
+++ b/packages/examples/core/ts/metadata/lifecycle_hooks_spec.ts
@@ -9,7 +9,7 @@
 import {AfterContentChecked, AfterContentInit, AfterViewChecked, AfterViewInit, Component, DoCheck, Input, OnChanges, OnDestroy, OnInit, SimpleChanges, Type} from '@angular/core';
 import {TestBed} from '@angular/core/testing';
 
-export function main() {
+(function(){
   describe('lifecycle hooks examples', () => {
     it('should work with ngOnInit', () => {
       // #docregion OnInit
@@ -147,4 +147,4 @@ export function main() {
       proto[method] = (...args: any[]) => { log.push([method, args]); };
     });
   }
-}
+})();
diff --git a/packages/forms/test/directives_spec.ts b/packages/forms/test/directives_spec.ts
index 63ab7650b1..cd9c63a81d 100644
--- a/packages/forms/test/directives_spec.ts
+++ b/packages/forms/test/directives_spec.ts
@@ -40,7 +40,7 @@ function asyncValidator(expected: any, timeout = 0) {
   };
 }
 
-export function main() {
+{
   describe('Form Directives', () => {
     let defaultAccessor: DefaultValueAccessor;
 
diff --git a/packages/forms/test/form_array_spec.ts b/packages/forms/test/form_array_spec.ts
index 11b0605ae3..ec0a30992d 100644
--- a/packages/forms/test/form_array_spec.ts
+++ b/packages/forms/test/form_array_spec.ts
@@ -12,7 +12,7 @@ import {AbstractControl, FormArray, FormControl, FormGroup, ValidationErrors} fr
 import {of } from 'rxjs/observable/of';
 import {Validators} from '../src/validators';
 
-export function main() {
+(function(){
   function asyncValidator(expected: string, timeouts = {}) {
     return (c: AbstractControl) => {
       let resolve: (result: any) => void = undefined !;
@@ -1100,4 +1100,4 @@ export function main() {
 
     });
   });
-}
+})();
diff --git a/packages/forms/test/form_builder_spec.ts b/packages/forms/test/form_builder_spec.ts
index fbcca1a590..b8c112be3c 100644
--- a/packages/forms/test/form_builder_spec.ts
+++ b/packages/forms/test/form_builder_spec.ts
@@ -9,7 +9,7 @@
 import {beforeEach, describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {FormBuilder} from '@angular/forms';
 
-export function main() {
+(function(){
   function syncValidator(_: any /** TODO #9100 */): any /** TODO #9100 */ { return null; }
   function asyncValidator(_: any /** TODO #9100 */) { return Promise.resolve(null); }
 
@@ -67,4 +67,4 @@ export function main() {
       expect(a.asyncValidator).toBe(asyncValidator);
     });
   });
-}
+})();
diff --git a/packages/forms/test/form_control_spec.ts b/packages/forms/test/form_control_spec.ts
index cd3d1fe07b..902c7af226 100644
--- a/packages/forms/test/form_control_spec.ts
+++ b/packages/forms/test/form_control_spec.ts
@@ -13,7 +13,7 @@ import {FormControl, FormGroup, Validators} from '@angular/forms';
 
 import {FormArray} from '../src/model';
 
-export function main() {
+(function(){
   function asyncValidator(expected: string, timeouts = {}) {
     return (c: FormControl) => {
       let resolve: (result: any) => void = undefined !;
@@ -1142,4 +1142,4 @@ export function main() {
       });
     });
   });
-}
+})();
diff --git a/packages/forms/test/form_group_spec.ts b/packages/forms/test/form_group_spec.ts
index feb20cdf0b..c5edd1112f 100644
--- a/packages/forms/test/form_group_spec.ts
+++ b/packages/forms/test/form_group_spec.ts
@@ -13,7 +13,7 @@ import {AbstractControl, FormArray, FormControl, FormGroup, ValidationErrors, Va
 import {of } from 'rxjs/observable/of';
 
 
-export function main() {
+(function(){
   function simpleValidator(c: AbstractControl): ValidationErrors|null {
     return c.get('one') !.value === 'correct' ? null : {'broken': true};
   }
@@ -1126,4 +1126,4 @@ export function main() {
 
 
   });
-}
+})();
diff --git a/packages/forms/test/reactive_integration_spec.ts b/packages/forms/test/reactive_integration_spec.ts
index 03a683f6b7..78ea96ad6c 100644
--- a/packages/forms/test/reactive_integration_spec.ts
+++ b/packages/forms/test/reactive_integration_spec.ts
@@ -18,7 +18,7 @@ import {_do} from 'rxjs/operator/do';
 
 import {MyInput, MyInputForm} from './value_accessor_integration_spec';
 
-export function main() {
+{
   describe('reactive forms integration tests', () => {
 
     function initTest<T>(component: Type<T>, ...directives: Type<any>[]): ComponentFixture<T> {
diff --git a/packages/forms/test/template_integration_spec.ts b/packages/forms/test/template_integration_spec.ts
index 261e4361a6..d4a459a71a 100644
--- a/packages/forms/test/template_integration_spec.ts
+++ b/packages/forms/test/template_integration_spec.ts
@@ -16,7 +16,7 @@ import {merge} from 'rxjs/observable/merge';
 
 import {NgModelCustomComp, NgModelCustomWrapper} from './value_accessor_integration_spec';
 
-export function main() {
+{
   describe('template-driven forms integration tests', () => {
 
     function initTest<T>(component: Type<T>, ...directives: Type<any>[]): ComponentFixture<T> {
diff --git a/packages/forms/test/validators_spec.ts b/packages/forms/test/validators_spec.ts
index 84fa3935ed..8ff86ae504 100644
--- a/packages/forms/test/validators_spec.ts
+++ b/packages/forms/test/validators_spec.ts
@@ -17,7 +17,7 @@ import {map} from 'rxjs/operator/map';
 import {normalizeAsyncValidator} from '../src/directives/normalize_validator';
 import {AsyncValidator, ValidationErrors, ValidatorFn} from '../src/directives/validators';
 
-export function main() {
+(function(){
   function validator(key: string, error: any): ValidatorFn {
     return (c: AbstractControl) => {
       const r: ValidationErrors = {};
@@ -435,4 +435,4 @@ export function main() {
 
     });
   });
-}
+})();
diff --git a/packages/forms/test/value_accessor_integration_spec.ts b/packages/forms/test/value_accessor_integration_spec.ts
index 0eb3b25dde..8703bb7b81 100644
--- a/packages/forms/test/value_accessor_integration_spec.ts
+++ b/packages/forms/test/value_accessor_integration_spec.ts
@@ -12,7 +12,7 @@ import {AbstractControl, ControlValueAccessor, FormControl, FormGroup, FormsModu
 import {By} from '@angular/platform-browser/src/dom/debug/by';
 import {dispatchEvent} from '@angular/platform-browser/testing/src/browser_util';
 
-export function main() {
+{
   describe('value accessors', () => {
 
     function initTest<T>(component: Type<T>, ...directives: Type<any>[]): ComponentFixture<T> {
diff --git a/packages/http/test/backends/jsonp_backend_spec.ts b/packages/http/test/backends/jsonp_backend_spec.ts
index 0fcfad3b34..4f98ca8066 100644
--- a/packages/http/test/backends/jsonp_backend_spec.ts
+++ b/packages/http/test/backends/jsonp_backend_spec.ts
@@ -46,7 +46,7 @@ class MockBrowserJsonp extends BrowserJsonp {
   }
 }
 
-export function main() {
+{
   describe('JSONPBackend', () => {
     let backend: JSONPBackend;
     let sampleRequest: Request;
diff --git a/packages/http/test/backends/mock_backend_spec.ts b/packages/http/test/backends/mock_backend_spec.ts
index 73a2d9df29..88883251e5 100644
--- a/packages/http/test/backends/mock_backend_spec.ts
+++ b/packages/http/test/backends/mock_backend_spec.ts
@@ -17,7 +17,7 @@ import {Request} from '../../src/static_request';
 import {Response} from '../../src/static_response';
 import {MockBackend, MockConnection} from '../../testing/src/mock_backend';
 
-export function main() {
+{
   describe('MockBackend', () => {
 
     let backend: MockBackend;
diff --git a/packages/http/test/backends/xhr_backend_spec.ts b/packages/http/test/backends/xhr_backend_spec.ts
index d56bdfb290..7c4b117aa6 100644
--- a/packages/http/test/backends/xhr_backend_spec.ts
+++ b/packages/http/test/backends/xhr_backend_spec.ts
@@ -84,7 +84,7 @@ class MockBrowserXHR extends BrowserXhr {
   }
 }
 
-export function main() {
+{
   describe('XHRBackend', () => {
     let backend: XHRBackend;
     let sampleRequest: Request;
diff --git a/packages/http/test/base_request_options_spec.ts b/packages/http/test/base_request_options_spec.ts
index f42f895e39..bf694d9870 100644
--- a/packages/http/test/base_request_options_spec.ts
+++ b/packages/http/test/base_request_options_spec.ts
@@ -11,7 +11,7 @@ import {BaseRequestOptions, RequestOptions} from '../src/base_request_options';
 import {RequestMethod} from '../src/enums';
 import {Headers} from '../src/headers';
 
-export function main() {
+{
   describe('BaseRequestOptions', () => {
     it('should create a new object when calling merge', () => {
       const options1 = new BaseRequestOptions();
diff --git a/packages/http/test/headers_spec.ts b/packages/http/test/headers_spec.ts
index 64107463c3..8bf97cd58a 100644
--- a/packages/http/test/headers_spec.ts
+++ b/packages/http/test/headers_spec.ts
@@ -8,7 +8,7 @@
 
 import {Headers} from '../src/headers';
 
-export function main() {
+{
   describe('Headers', () => {
 
     describe('initialization', () => {
diff --git a/packages/http/test/http_spec.ts b/packages/http/test/http_spec.ts
index 9b7098b3df..383180376f 100644
--- a/packages/http/test/http_spec.ts
+++ b/packages/http/test/http_spec.ts
@@ -17,7 +17,7 @@ import {BaseRequestOptions, ConnectionBackend, Http, HttpModule, JSONPBackend, J
 import {stringToArrayBuffer} from '../src/http_utils';
 import {MockBackend, MockConnection} from '../testing/src/mock_backend';
 
-export function main() {
+{
   describe('injectables', () => {
     const url = 'http://foo.bar';
     let http: Http;
diff --git a/packages/http/test/static_request_spec.ts b/packages/http/test/static_request_spec.ts
index 79878966da..95e080ba08 100644
--- a/packages/http/test/static_request_spec.ts
+++ b/packages/http/test/static_request_spec.ts
@@ -15,7 +15,7 @@ import {Headers} from '../src/headers';
 import {stringToArrayBuffer, stringToArrayBuffer8} from '../src/http_utils';
 import {ArrayBuffer, Request} from '../src/static_request';
 
-export function main() {
+{
   describe('Request', () => {
     describe('detectContentType', () => {
       it('should return ContentType.NONE', () => {
diff --git a/packages/http/test/static_response_spec.ts b/packages/http/test/static_response_spec.ts
index b820ca4482..de369f27c7 100644
--- a/packages/http/test/static_response_spec.ts
+++ b/packages/http/test/static_response_spec.ts
@@ -13,7 +13,7 @@ import {Response} from '../src/static_response';
 
 
 
-export function main() {
+{
   describe('Response', () => {
     it('should be ok for 200 statuses', () => {
       expect(new Response(new ResponseOptions({status: 200})).ok).toEqual(true);
diff --git a/packages/http/test/url_search_params_spec.ts b/packages/http/test/url_search_params_spec.ts
index e95620ed46..d707dcdc57 100644
--- a/packages/http/test/url_search_params_spec.ts
+++ b/packages/http/test/url_search_params_spec.ts
@@ -9,7 +9,7 @@
 import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {URLSearchParams} from '../src/url_search_params';
 
-export function main() {
+{
   describe('URLSearchParams', () => {
     it('should conform to spec', () => {
       const paramsString = 'q=URLUtils.searchParams&topic=api';
diff --git a/packages/platform-browser-dynamic/test/metadata_overrider_spec.ts b/packages/platform-browser-dynamic/test/metadata_overrider_spec.ts
index b56d45b10a..91183e9ceb 100644
--- a/packages/platform-browser-dynamic/test/metadata_overrider_spec.ts
+++ b/packages/platform-browser-dynamic/test/metadata_overrider_spec.ts
@@ -46,7 +46,7 @@ class OtherMetadata extends SomeMetadata implements OtherMetadataType {
   }
 }
 
-export function main() {
+{
   describe('metadata overrider', () => {
     let overrider: MetadataOverrider;
 
diff --git a/packages/platform-browser-dynamic/test/resource_loader/resource_loader_cache_spec.ts b/packages/platform-browser-dynamic/test/resource_loader/resource_loader_cache_spec.ts
index 0e878e5db6..4f109fbbe1 100644
--- a/packages/platform-browser-dynamic/test/resource_loader/resource_loader_cache_spec.ts
+++ b/packages/platform-browser-dynamic/test/resource_loader/resource_loader_cache_spec.ts
@@ -15,7 +15,7 @@ import {CachedResourceLoader} from '../../src/resource_loader/resource_loader_ca
 
 import {setTemplateCache} from './resource_loader_cache_setter';
 
-export function main() {
+{
   describe('CachedResourceLoader', () => {
     let resourceLoader: CachedResourceLoader;
 
diff --git a/packages/platform-browser-dynamic/test/resource_loader/resource_loader_impl_spec.ts b/packages/platform-browser-dynamic/test/resource_loader/resource_loader_impl_spec.ts
index 1a325a8bd9..626fddae8c 100644
--- a/packages/platform-browser-dynamic/test/resource_loader/resource_loader_impl_spec.ts
+++ b/packages/platform-browser-dynamic/test/resource_loader/resource_loader_impl_spec.ts
@@ -9,7 +9,7 @@
 import {AsyncTestCompleter, beforeEach, describe, expect, inject, it} from '@angular/core/testing/src/testing_internal';
 import {ResourceLoaderImpl} from '../../src/resource_loader/resource_loader_impl';
 
-export function main() {
+{
   describe('ResourceLoaderImpl', () => {
     let resourceLoader: ResourceLoaderImpl;
 
diff --git a/packages/platform-browser-dynamic/test/testing_public_browser_spec.ts b/packages/platform-browser-dynamic/test/testing_public_browser_spec.ts
index b9afecaaf5..a009dcfa02 100644
--- a/packages/platform-browser-dynamic/test/testing_public_browser_spec.ts
+++ b/packages/platform-browser-dynamic/test/testing_public_browser_spec.ts
@@ -37,7 +37,7 @@ class BadTemplateUrl {
 
 // Tests for angular/testing bundle specific to the browser environment.
 // For general tests, see test/testing/testing_public_spec.ts.
-export function main() {
+{
   describe('test APIs for the browser', () => {
     describe('using the async helper', () => {
       let actuallyDone: boolean;
diff --git a/packages/platform-browser/animations/test/noop_animations_module_spec.ts b/packages/platform-browser/animations/test/noop_animations_module_spec.ts
index 5041fed64e..bb9bb8f76a 100644
--- a/packages/platform-browser/animations/test/noop_animations_module_spec.ts
+++ b/packages/platform-browser/animations/test/noop_animations_module_spec.ts
@@ -12,7 +12,7 @@ import {TestBed} from '@angular/core/testing';
 
 import {NoopAnimationsModule} from '../src/module';
 
-export function main() {
+{
   describe('NoopAnimationsModule', () => {
     beforeEach(() => { TestBed.configureTestingModule({imports: [NoopAnimationsModule]}); });
 
diff --git a/packages/platform-browser/test/animation/animation_renderer_spec.ts b/packages/platform-browser/test/animation/animation_renderer_spec.ts
index ba44b66176..39e47a42ae 100644
--- a/packages/platform-browser/test/animation/animation_renderer_spec.ts
+++ b/packages/platform-browser/test/animation/animation_renderer_spec.ts
@@ -14,7 +14,7 @@ import {DomRendererFactory2} from '@angular/platform-browser/src/dom/dom_rendere
 import {InjectableAnimationEngine} from '../../animations/src/providers';
 import {el} from '../../testing/src/browser_util';
 
-export function main() {
+{
   describe('AnimationRenderer', () => {
     let element: any;
     beforeEach(() => {
diff --git a/packages/platform-browser/test/animation/browser_animation_builder_spec.ts b/packages/platform-browser/test/animation/browser_animation_builder_spec.ts
index d427a2d629..012b130fe6 100644
--- a/packages/platform-browser/test/animation/browser_animation_builder_spec.ts
+++ b/packages/platform-browser/test/animation/browser_animation_builder_spec.ts
@@ -15,7 +15,7 @@ import {NoopAnimationsModule} from '@angular/platform-browser/animations';
 import {BrowserAnimationBuilder} from '../../animations/src/animation_builder';
 import {el} from '../../testing/src/browser_util';
 
-export function main() {
+{
   describe('BrowserAnimationBuilder', () => {
     let element: any;
     beforeEach(() => {
diff --git a/packages/platform-browser/test/browser/bootstrap_spec.ts b/packages/platform-browser/test/browser/bootstrap_spec.ts
index e028cbbc1f..f08204ba83 100644
--- a/packages/platform-browser/test/browser/bootstrap_spec.ts
+++ b/packages/platform-browser/test/browser/bootstrap_spec.ts
@@ -127,7 +127,7 @@ function bootstrap(
   return platformBrowserDynamic(platformProviders).bootstrapModule(TestModule);
 }
 
-export function main() {
+{
   let el: any /** TODO #9100 */, el2: any /** TODO #9100 */, testProviders: Provider[],
       lightDom: any /** TODO #9100 */;
 
diff --git a/packages/platform-browser/test/browser/browser_adapter_spec.ts b/packages/platform-browser/test/browser/browser_adapter_spec.ts
index 5230ed926e..f73b8bc90c 100644
--- a/packages/platform-browser/test/browser/browser_adapter_spec.ts
+++ b/packages/platform-browser/test/browser/browser_adapter_spec.ts
@@ -10,7 +10,7 @@ import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 
 
-export function main() {
+{
   describe('cookies', () => {
     it('sets cookie values', () => {
       getDOM().setCookie('my test cookie', 'my test value');
diff --git a/packages/platform-browser/test/browser/meta_spec.ts b/packages/platform-browser/test/browser/meta_spec.ts
index d435f06a01..66325a40f7 100644
--- a/packages/platform-browser/test/browser/meta_spec.ts
+++ b/packages/platform-browser/test/browser/meta_spec.ts
@@ -12,7 +12,7 @@ import {BrowserModule, Meta} from '@angular/platform-browser';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('Meta service', () => {
     let doc: Document;
     let metaService: Meta;
diff --git a/packages/platform-browser/test/browser/title_spec.ts b/packages/platform-browser/test/browser/title_spec.ts
index a23ef51fda..a9032eb4f5 100644
--- a/packages/platform-browser/test/browser/title_spec.ts
+++ b/packages/platform-browser/test/browser/title_spec.ts
@@ -12,7 +12,7 @@ import {BrowserModule, Title} from '@angular/platform-browser';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('title service', () => {
     let doc: Document;
     let initialTitle: string;
diff --git a/packages/platform-browser/test/browser/tools/tools_spec.ts b/packages/platform-browser/test/browser/tools/tools_spec.ts
index 33676db30c..9985125712 100644
--- a/packages/platform-browser/test/browser/tools/tools_spec.ts
+++ b/packages/platform-browser/test/browser/tools/tools_spec.ts
@@ -10,7 +10,7 @@ import {disableDebugTools, enableDebugTools} from '@angular/platform-browser';
 
 import {SpyComponentRef, callNgProfilerTimeChangeDetection} from './spies';
 
-export function main() {
+{
   describe('profiler', () => {
     beforeEach(() => { enableDebugTools((<any>new SpyComponentRef())); });
 
diff --git a/packages/platform-browser/test/browser/transfer_state_spec.ts b/packages/platform-browser/test/browser/transfer_state_spec.ts
index 78e4d668c2..975be183ba 100644
--- a/packages/platform-browser/test/browser/transfer_state_spec.ts
+++ b/packages/platform-browser/test/browser/transfer_state_spec.ts
@@ -12,7 +12,7 @@ import {BrowserModule, BrowserTransferStateModule, TransferState} from '@angular
 import {StateKey, escapeHtml, makeStateKey, unescapeHtml} from '@angular/platform-browser/src/browser/transfer_state';
 import {DOCUMENT} from '@angular/platform-browser/src/dom/dom_tokens';
 
-export function main() {
+(function(){
   function removeScriptTag(doc: Document, id: string) {
     const existing = doc.getElementById(id);
     if (existing) {
@@ -109,4 +109,4 @@ export function main() {
       expect(unescapedObj['testString']).toBe(testString);
     });
   });
-}
\ No newline at end of file
+})();
\ No newline at end of file
diff --git a/packages/platform-browser/test/browser_util_spec.ts b/packages/platform-browser/test/browser_util_spec.ts
index b62d113cf8..664f2cc366 100644
--- a/packages/platform-browser/test/browser_util_spec.ts
+++ b/packages/platform-browser/test/browser_util_spec.ts
@@ -9,7 +9,7 @@
 
 import {BrowserDetection} from '../testing/src/browser_util';
 
-export function main() {
+{
   describe('BrowserDetection', () => {
 
     const browsers = [
diff --git a/packages/platform-browser/test/dom/dom_renderer_spec.ts b/packages/platform-browser/test/dom/dom_renderer_spec.ts
index e3332ad818..1b4ca221f6 100644
--- a/packages/platform-browser/test/dom/dom_renderer_spec.ts
+++ b/packages/platform-browser/test/dom/dom_renderer_spec.ts
@@ -12,7 +12,7 @@ import {browserDetection} from '@angular/platform-browser/testing/src/browser_ut
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 import {NAMESPACE_URIS} from '../../src/dom/dom_renderer';
 
-export function main() {
+{
   describe('DefaultDomRendererV2', () => {
     let renderer: Renderer2;
 
diff --git a/packages/platform-browser/test/dom/events/event_manager_spec.ts b/packages/platform-browser/test/dom/events/event_manager_spec.ts
index ea4c35c984..8597d1a8a6 100644
--- a/packages/platform-browser/test/dom/events/event_manager_spec.ts
+++ b/packages/platform-browser/test/dom/events/event_manager_spec.ts
@@ -13,7 +13,7 @@ import {DomEventsPlugin} from '@angular/platform-browser/src/dom/events/dom_even
 import {EventManager, EventManagerPlugin} from '@angular/platform-browser/src/dom/events/event_manager';
 import {el} from '../../../testing/src/browser_util';
 
-export function main() {
+{
   let domEventPlugin: DomEventsPlugin;
   let doc: any;
   let zone: NgZone;
diff --git a/packages/platform-browser/test/dom/events/hammer_gestures_spec.ts b/packages/platform-browser/test/dom/events/hammer_gestures_spec.ts
index 1662578ac0..40bc6f8187 100644
--- a/packages/platform-browser/test/dom/events/hammer_gestures_spec.ts
+++ b/packages/platform-browser/test/dom/events/hammer_gestures_spec.ts
@@ -8,7 +8,7 @@
 import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {HammerGestureConfig, HammerGesturesPlugin} from '@angular/platform-browser/src/dom/events/hammer_gestures';
 
-export function main() {
+{
   describe('HammerGesturesPlugin', () => {
 
     it('should implement addGlobalEventListener', () => {
diff --git a/packages/platform-browser/test/dom/events/key_events_spec.ts b/packages/platform-browser/test/dom/events/key_events_spec.ts
index ba96007c0e..9cbeb2cf73 100644
--- a/packages/platform-browser/test/dom/events/key_events_spec.ts
+++ b/packages/platform-browser/test/dom/events/key_events_spec.ts
@@ -9,7 +9,7 @@
 import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
 import {KeyEventsPlugin} from '@angular/platform-browser/src/dom/events/key_events';
 
-export function main() {
+{
   describe('KeyEventsPlugin', () => {
 
     it('should ignore unrecognized events', () => {
diff --git a/packages/platform-browser/test/dom/shared_styles_host_spec.ts b/packages/platform-browser/test/dom/shared_styles_host_spec.ts
index c0c10dffab..c7c16bbbd1 100644
--- a/packages/platform-browser/test/dom/shared_styles_host_spec.ts
+++ b/packages/platform-browser/test/dom/shared_styles_host_spec.ts
@@ -11,7 +11,7 @@ import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {DomSharedStylesHost} from '@angular/platform-browser/src/dom/shared_styles_host';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
 
-export function main() {
+{
   describe('DomSharedStylesHost', () => {
     let doc: Document;
     let ssh: DomSharedStylesHost;
diff --git a/packages/platform-browser/test/security/dom_sanitization_service_spec.ts b/packages/platform-browser/test/security/dom_sanitization_service_spec.ts
index 578f9ef7eb..759b95c780 100644
--- a/packages/platform-browser/test/security/dom_sanitization_service_spec.ts
+++ b/packages/platform-browser/test/security/dom_sanitization_service_spec.ts
@@ -11,7 +11,7 @@ import * as t from '@angular/core/testing/src/testing_internal';
 
 import {DomSanitizerImpl} from '../../src/security/dom_sanitization_service';
 
-export function main() {
+{
   t.describe('DOM Sanitization Service', () => {
     t.it('accepts resource URL values for resource contexts', () => {
       const svc = new DomSanitizerImpl(null);
diff --git a/packages/platform-browser/test/security/html_sanitizer_spec.ts b/packages/platform-browser/test/security/html_sanitizer_spec.ts
index a46e139b6f..2e8b489141 100644
--- a/packages/platform-browser/test/security/html_sanitizer_spec.ts
+++ b/packages/platform-browser/test/security/html_sanitizer_spec.ts
@@ -11,7 +11,7 @@ import {browserDetection} from '@angular/platform-browser/testing/src/browser_ut
 import {getDOM} from '../../src/dom/dom_adapter';
 import {sanitizeHtml} from '../../src/security/html_sanitizer';
 
-export function main() {
+{
   describe('HTML sanitizer', () => {
     let defaultDoc: any;
     let originalLog: (msg: any) => any = null !;
diff --git a/packages/platform-browser/test/security/style_sanitizer_spec.ts b/packages/platform-browser/test/security/style_sanitizer_spec.ts
index 72f3784370..0b0942b218 100644
--- a/packages/platform-browser/test/security/style_sanitizer_spec.ts
+++ b/packages/platform-browser/test/security/style_sanitizer_spec.ts
@@ -11,7 +11,7 @@ import * as t from '@angular/core/testing/src/testing_internal';
 import {getDOM} from '../../src/dom/dom_adapter';
 import {sanitizeStyle} from '../../src/security/style_sanitizer';
 
-export function main() {
+{
   t.describe('Style sanitizer', () => {
     let logMsgs: string[];
     let originalLog: (msg: any) => any;
diff --git a/packages/platform-browser/test/security/url_sanitizer_spec.ts b/packages/platform-browser/test/security/url_sanitizer_spec.ts
index a39bc3ad47..919909508d 100644
--- a/packages/platform-browser/test/security/url_sanitizer_spec.ts
+++ b/packages/platform-browser/test/security/url_sanitizer_spec.ts
@@ -11,7 +11,7 @@ import * as t from '@angular/core/testing/src/testing_internal';
 import {getDOM} from '../../src/dom/dom_adapter';
 import {sanitizeSrcset, sanitizeUrl} from '../../src/security/url_sanitizer';
 
-export function main() {
+{
   t.describe('URL sanitizer', () => {
     let logMsgs: string[];
     let originalLog: (msg: any) => any;
diff --git a/packages/platform-browser/test/testing_public_spec.ts b/packages/platform-browser/test/testing_public_spec.ts
index 62e22ec307..8ca4b05287 100644
--- a/packages/platform-browser/test/testing_public_spec.ts
+++ b/packages/platform-browser/test/testing_public_spec.ts
@@ -108,7 +108,7 @@ class SomeLibModule {
 class CompWithUrlTemplate {
 }
 
-export function main() {
+{
   describe('public testing API', () => {
     describe('using the async helper with context passing', () => {
       beforeEach(function() { this.actuallyDone = false; });
diff --git a/packages/platform-server/test/integration_spec.ts b/packages/platform-server/test/integration_spec.ts
index d4598c07e1..bfabca348c 100644
--- a/packages/platform-server/test/integration_spec.ts
+++ b/packages/platform-server/test/integration_spec.ts
@@ -298,7 +298,7 @@ class TransferStoreModule {
 class EscapedTransferStoreModule {
 }
 
-export function main() {
+(function(){
   if (getDOM().supportsDOMEvents()) return;  // NODE only
 
   describe('platform-server integration', () => {
@@ -756,4 +756,4 @@ export function main() {
          }));
     });
   });
-}
+})();
diff --git a/packages/platform-webworker/test/web_workers/shared/message_bus_spec.ts b/packages/platform-webworker/test/web_workers/shared/message_bus_spec.ts
index ffbdb3450c..344c4f4bbc 100644
--- a/packages/platform-webworker/test/web_workers/shared/message_bus_spec.ts
+++ b/packages/platform-webworker/test/web_workers/shared/message_bus_spec.ts
@@ -13,7 +13,7 @@ import {MessageBus} from '@angular/platform-webworker/src/web_workers/shared/mes
 
 import {createConnectedMessageBus} from './message_bus_util';
 
-export function main() {
+{
   /**
    * Tests the PostMessageBus
    */
diff --git a/packages/platform-webworker/test/web_workers/shared/render_store_spec.ts b/packages/platform-webworker/test/web_workers/shared/render_store_spec.ts
index a06460a0c1..35d720a3e9 100644
--- a/packages/platform-webworker/test/web_workers/shared/render_store_spec.ts
+++ b/packages/platform-webworker/test/web_workers/shared/render_store_spec.ts
@@ -8,7 +8,7 @@
 
 import {RenderStore} from '@angular/platform-webworker/src/web_workers/shared/render_store';
 
-export function main() {
+{
   describe('RenderStoreSpec', () => {
     let store: RenderStore;
     beforeEach(() => { store = new RenderStore(); });
diff --git a/packages/platform-webworker/test/web_workers/shared/service_message_broker_spec.ts b/packages/platform-webworker/test/web_workers/shared/service_message_broker_spec.ts
index 090f1c9908..e4e19b3bce 100644
--- a/packages/platform-webworker/test/web_workers/shared/service_message_broker_spec.ts
+++ b/packages/platform-webworker/test/web_workers/shared/service_message_broker_spec.ts
@@ -14,7 +14,7 @@ import {ServiceMessageBroker} from '@angular/platform-webworker/src/web_workers/
 
 import {createPairedMessageBuses} from './web_worker_test_util';
 
-export function main() {
+{
   const CHANNEL = 'UIMessageBroker Test Channel';
   const TEST_METHOD = 'TEST_METHOD';
   const PASSED_ARG_1 = 5;
diff --git a/packages/platform-webworker/test/web_workers/worker/platform_location_spec.ts b/packages/platform-webworker/test/web_workers/worker/platform_location_spec.ts
index a9481c10f9..eae82a00b6 100644
--- a/packages/platform-webworker/test/web_workers/worker/platform_location_spec.ts
+++ b/packages/platform-webworker/test/web_workers/worker/platform_location_spec.ts
@@ -16,7 +16,7 @@ import {MockMessageBrokerFactory, createPairedMessageBuses, expectBrokerCall} fr
 
 import {SpyMessageBroker} from './spies';
 
-export function main() {
+{
   describe('WebWorkerPlatformLocation', () => {
     let uiBus: MessageBus = null !;
     let workerBus: MessageBus = null !;
diff --git a/packages/platform-webworker/test/web_workers/worker/renderer_v2_integration_spec.ts b/packages/platform-webworker/test/web_workers/worker/renderer_v2_integration_spec.ts
index 16a26462ff..91db66762a 100644
--- a/packages/platform-webworker/test/web_workers/worker/renderer_v2_integration_spec.ts
+++ b/packages/platform-webworker/test/web_workers/worker/renderer_v2_integration_spec.ts
@@ -25,7 +25,7 @@ import {PairedMessageBuses, createPairedMessageBuses} from '../shared/web_worker
 
 let lastCreatedRenderer: Renderer2;
 
-export function main() {
+{
   describe('Web Worker Renderer v2', () => {
     // Don't run on server...
     if (!getDOM().supportsDOMEvents()) return;
diff --git a/packages/service-worker/config/test/generator_spec.ts b/packages/service-worker/config/test/generator_spec.ts
index 2511226c61..3510baf7f3 100644
--- a/packages/service-worker/config/test/generator_spec.ts
+++ b/packages/service-worker/config/test/generator_spec.ts
@@ -9,7 +9,7 @@
 import {Generator} from '../src/generator';
 import {MockFilesystem} from '../testing/mock';
 
-export function main() {
+{
   describe('Generator', () => {
     it('generates a correct config', (done: DoneFn) => {
       const fs = new MockFilesystem({
diff --git a/packages/service-worker/test/comm_spec.ts b/packages/service-worker/test/comm_spec.ts
index 3d6f27e191..09c22fb2e0 100644
--- a/packages/service-worker/test/comm_spec.ts
+++ b/packages/service-worker/test/comm_spec.ts
@@ -14,7 +14,7 @@ import {SwPush} from '../src/push';
 import {SwUpdate} from '../src/update';
 import {MockServiceWorkerContainer, MockServiceWorkerRegistration} from '../testing/mock';
 
-export function main() {
+{
   describe('ServiceWorker library', () => {
     let mock: MockServiceWorkerContainer;
     let comm: NgswCommChannel;
diff --git a/packages/service-worker/test/integration_spec.ts b/packages/service-worker/test/integration_spec.ts
index 3a500c1054..b407286ead 100644
--- a/packages/service-worker/test/integration_spec.ts
+++ b/packages/service-worker/test/integration_spec.ts
@@ -65,7 +65,7 @@ const server = new MockServerStateBuilder().withStaticFiles(dist).withManifest(m
 const serverUpdate =
     new MockServerStateBuilder().withStaticFiles(distUpdate).withManifest(manifestUpdate).build();
 
-export function main() {
+(function(){
   // Skip environments that don't support the minimum APIs needed to run the SW tests.
   if (!SwTestHarness.envIsSupported()) {
     return;
@@ -129,4 +129,4 @@ export function main() {
       await gotPushNotice;
     });
   });
-}
+})();
diff --git a/packages/service-worker/worker/test/data_spec.ts b/packages/service-worker/worker/test/data_spec.ts
index 1a21a5a84d..10ec69fa64 100644
--- a/packages/service-worker/worker/test/data_spec.ts
+++ b/packages/service-worker/worker/test/data_spec.ts
@@ -114,7 +114,7 @@ function asyncWrap(fn: () => Promise<void>): (done: DoneFn) => void {
   return (done: DoneFn) => { fn().then(() => done(), err => done.fail(err)); };
 }
 
-export function main() {
+(function(){
   // Skip environments that don't support the minimum APIs needed to run the SW tests.
   if (!SwTestHarness.envIsSupported()) {
     return;
@@ -242,7 +242,7 @@ export function main() {
       });
     });
   });
-}
+})();
 
 async function makeRequest(scope: SwTestHarness, url: string, clientId?: string):
     Promise<string|null> {
diff --git a/packages/service-worker/worker/test/happy_spec.ts b/packages/service-worker/worker/test/happy_spec.ts
index e578b8aeb7..9a9bcec530 100644
--- a/packages/service-worker/worker/test/happy_spec.ts
+++ b/packages/service-worker/worker/test/happy_spec.ts
@@ -139,7 +139,7 @@ const scope = new SwTestHarnessBuilder().withServerState(server).build();
 const manifestHash = sha1(JSON.stringify(manifest));
 const manifestUpdateHash = sha1(JSON.stringify(manifestUpdate));
 
-export function main() {
+(function(){
   // Skip environments that don't support the minimum APIs needed to run the SW tests.
   if (!SwTestHarness.envIsSupported()) {
     return;
@@ -674,7 +674,7 @@ export function main() {
       });
     });
   });
-}
+})();
 
 async function makeRequest(
     scope: SwTestHarness, url: string, clientId?: string, init?: Object): Promise<string|null> {
diff --git a/packages/service-worker/worker/test/idle_spec.ts b/packages/service-worker/worker/test/idle_spec.ts
index 2ebfc023ef..b20c276365 100644
--- a/packages/service-worker/worker/test/idle_spec.ts
+++ b/packages/service-worker/worker/test/idle_spec.ts
@@ -10,7 +10,7 @@ import {IdleScheduler} from '../src/idle';
 import {SwTestHarness, SwTestHarnessBuilder} from '../testing/scope';
 import {async_beforeEach, async_fit, async_it} from './async';
 
-export function main() {
+(function(){
   // Skip environments that don't support the minimum APIs needed to run the SW tests.
   if (!SwTestHarness.envIsSupported()) {
     return;
@@ -134,4 +134,4 @@ export function main() {
       expect(completed).toEqual(true);
     });
   });
-}
\ No newline at end of file
+})();
\ No newline at end of file
diff --git a/packages/service-worker/worker/test/prefetch_spec.ts b/packages/service-worker/worker/test/prefetch_spec.ts
index a62277631b..05594f88f4 100644
--- a/packages/service-worker/worker/test/prefetch_spec.ts
+++ b/packages/service-worker/worker/test/prefetch_spec.ts
@@ -29,7 +29,7 @@ const db = new CacheDatabase(scope, scope);
 
 
 
-export function main() {
+(function(){
   // Skip environments that don't support the minimum APIs needed to run the SW tests.
   if (!SwTestHarness.envIsSupported()) {
     return;
@@ -86,7 +86,7 @@ export function main() {
       expect(err.message).toContain('Hash mismatch');
     });
   });
-}
+})();
 
 function errorFrom(promise: Promise<any>): Promise<any> {
   return promise.catch(err => err);
diff --git a/packages/upgrade/test/common/component_info_spec.ts b/packages/upgrade/test/common/component_info_spec.ts
index 5bddf8d2ae..63969b110e 100644
--- a/packages/upgrade/test/common/component_info_spec.ts
+++ b/packages/upgrade/test/common/component_info_spec.ts
@@ -8,7 +8,7 @@
 
 import {PropertyBinding} from '@angular/upgrade/src/common/component_info';
 
-export function main() {
+{
   describe('PropertyBinding', () => {
     it('should process a simple binding', () => {
       const binding = new PropertyBinding('someBinding', 'someBinding');
diff --git a/packages/upgrade/test/common/downgrade_component_adapter_spec.ts b/packages/upgrade/test/common/downgrade_component_adapter_spec.ts
index 7f91397afe..88e80c0751 100644
--- a/packages/upgrade/test/common/downgrade_component_adapter_spec.ts
+++ b/packages/upgrade/test/common/downgrade_component_adapter_spec.ts
@@ -12,7 +12,7 @@ import {DowngradeComponentAdapter, groupNodesBySelector} from '@angular/upgrade/
 
 import {nodes} from './test_helpers';
 
-export function main() {
+{
   describe('DowngradeComponentAdapter', () => {
     describe('groupNodesBySelector', () => {
       it('should return an array of node collections for each selector', () => {
diff --git a/packages/upgrade/test/common/downgrade_injectable_spec.ts b/packages/upgrade/test/common/downgrade_injectable_spec.ts
index fa60022cc4..628d8f1237 100644
--- a/packages/upgrade/test/common/downgrade_injectable_spec.ts
+++ b/packages/upgrade/test/common/downgrade_injectable_spec.ts
@@ -9,7 +9,7 @@
 import {INJECTOR_KEY} from '@angular/upgrade/src/common/constants';
 import {downgradeInjectable} from '@angular/upgrade/src/common/downgrade_injectable';
 
-export function main() {
+{
   describe('downgradeInjectable', () => {
     it('should return an AngularJS annotated factory for the token', () => {
       const factory = downgradeInjectable('someToken');
diff --git a/packages/upgrade/test/dynamic/upgrade_spec.ts b/packages/upgrade/test/dynamic/upgrade_spec.ts
index fd4e42d64b..8c6909a26d 100644
--- a/packages/upgrade/test/dynamic/upgrade_spec.ts
+++ b/packages/upgrade/test/dynamic/upgrade_spec.ts
@@ -14,7 +14,7 @@ import * as angular from '@angular/upgrade/src/common/angular1';
 import {UpgradeAdapter, UpgradeAdapterRef} from '@angular/upgrade/src/dynamic/upgrade_adapter';
 import {$digest, html, multiTrim} from './test_helpers';
 
-export function main() {
+{
   describe('adapter: ng1 to ng2', () => {
     beforeEach(() => destroyPlatform());
     afterEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/angular1_providers_spec.ts b/packages/upgrade/test/static/angular1_providers_spec.ts
index 85c3d98d9e..3c9956d82f 100644
--- a/packages/upgrade/test/static/angular1_providers_spec.ts
+++ b/packages/upgrade/test/static/angular1_providers_spec.ts
@@ -9,7 +9,7 @@
 import {Ng1Token} from '@angular/upgrade/src/common/angular1';
 import {compileFactory, injectorFactory, parseFactory, rootScopeFactory, setTempInjectorRef} from '@angular/upgrade/src/static/angular1_providers';
 
-export function main() {
+{
   describe('upgrade angular1_providers', () => {
     describe('compileFactory', () => {
       it('should retrieve and return `$compile`', () => {
diff --git a/packages/upgrade/test/static/integration/change_detection_spec.ts b/packages/upgrade/test/static/integration/change_detection_spec.ts
index 3ab70f5718..465f682b0d 100644
--- a/packages/upgrade/test/static/integration/change_detection_spec.ts
+++ b/packages/upgrade/test/static/integration/change_detection_spec.ts
@@ -15,7 +15,7 @@ import {UpgradeComponent, UpgradeModule, downgradeComponent} from '@angular/upgr
 
 import {bootstrap, html} from '../test_helpers';
 
-export function main() {
+{
   describe('scope/component change-detection', () => {
     beforeEach(() => destroyPlatform());
     afterEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/content_projection_spec.ts b/packages/upgrade/test/static/integration/content_projection_spec.ts
index ef211d229e..90c67208ff 100644
--- a/packages/upgrade/test/static/integration/content_projection_spec.ts
+++ b/packages/upgrade/test/static/integration/content_projection_spec.ts
@@ -15,7 +15,7 @@ import {UpgradeComponent, UpgradeModule, downgradeComponent} from '@angular/upgr
 
 import {bootstrap, html, multiTrim} from '../test_helpers';
 
-export function main() {
+{
   describe('content projection', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/downgrade_component_spec.ts b/packages/upgrade/test/static/integration/downgrade_component_spec.ts
index 01906ec5c2..8bc3cd0fa5 100644
--- a/packages/upgrade/test/static/integration/downgrade_component_spec.ts
+++ b/packages/upgrade/test/static/integration/downgrade_component_spec.ts
@@ -15,7 +15,7 @@ import {UpgradeModule, downgradeComponent} from '@angular/upgrade/static';
 
 import {$apply, bootstrap, html, multiTrim} from '../test_helpers';
 
-export function main() {
+{
   describe('downgrade ng2 component', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/downgrade_module_spec.ts b/packages/upgrade/test/static/integration/downgrade_module_spec.ts
index 52e2da16dd..5a3eba32ce 100644
--- a/packages/upgrade/test/static/integration/downgrade_module_spec.ts
+++ b/packages/upgrade/test/static/integration/downgrade_module_spec.ts
@@ -19,7 +19,7 @@ import {downgradeComponent, downgradeModule} from '@angular/upgrade/static';
 import {html, multiTrim} from '../test_helpers';
 
 
-export function main() {
+{
   [true, false].forEach(propagateDigest => {
     describe(`lazy-load ng2 module (propagateDigest: ${propagateDigest})`, () => {
 
diff --git a/packages/upgrade/test/static/integration/examples_spec.ts b/packages/upgrade/test/static/integration/examples_spec.ts
index 9e9f8dbcad..1a31e6f0e3 100644
--- a/packages/upgrade/test/static/integration/examples_spec.ts
+++ b/packages/upgrade/test/static/integration/examples_spec.ts
@@ -15,7 +15,7 @@ import {UpgradeComponent, UpgradeModule, downgradeComponent} from '@angular/upgr
 
 import {bootstrap, html, multiTrim} from '../test_helpers';
 
-export function main() {
+{
   describe('examples', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/injection_spec.ts b/packages/upgrade/test/static/integration/injection_spec.ts
index fa7ce8e4e1..128931f92e 100644
--- a/packages/upgrade/test/static/integration/injection_spec.ts
+++ b/packages/upgrade/test/static/integration/injection_spec.ts
@@ -16,7 +16,7 @@ import {UpgradeModule, downgradeInjectable, getAngularJSGlobal, setAngularJSGlob
 
 import {bootstrap, html} from '../test_helpers';
 
-export function main() {
+{
   describe('injection', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/testability_spec.ts b/packages/upgrade/test/static/integration/testability_spec.ts
index 7fc46c8f2d..d52d6c7f4a 100644
--- a/packages/upgrade/test/static/integration/testability_spec.ts
+++ b/packages/upgrade/test/static/integration/testability_spec.ts
@@ -16,7 +16,7 @@ import {UpgradeModule} from '@angular/upgrade/static';
 
 import {bootstrap, html} from '../test_helpers';
 
-export function main() {
+{
   describe('testability', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/packages/upgrade/test/static/integration/upgrade_component_spec.ts b/packages/upgrade/test/static/integration/upgrade_component_spec.ts
index 33f3a8906c..9d96cb0736 100644
--- a/packages/upgrade/test/static/integration/upgrade_component_spec.ts
+++ b/packages/upgrade/test/static/integration/upgrade_component_spec.ts
@@ -16,7 +16,7 @@ import {UpgradeComponent, UpgradeModule, downgradeComponent} from '@angular/upgr
 
 import {$digest, bootstrap, html, multiTrim} from '../test_helpers';
 
-export function main() {
+{
   describe('upgrade ng1 component', () => {
 
     beforeEach(() => destroyPlatform());
diff --git a/test-main.js b/test-main.js
index 46eb33c3b7..a65ecb5970 100644
--- a/test-main.js
+++ b/test-main.js
@@ -89,7 +89,7 @@ System.import('@angular/core/testing')
                              .map(function(path) {
                                return System.import(path).then(function(module) {
                                  if (module.hasOwnProperty('main')) {
-                                   module.main();
+                                   throw new Error('main() in specs are no longer supported');
                                  }
                                });
                              }));