diff --git a/docs/docs-package/index.js b/docs/docs-package/index.js
index 67b78fb474..943cd546fe 100644
--- a/docs/docs-package/index.js
+++ b/docs/docs-package/index.js
@@ -1,5 +1,3 @@
-require('../../tools/transpiler/index.js').init();
-
 var Package = require('dgeni').Package;
 var jsdocPackage = require('dgeni-packages/jsdoc');
 var nunjucksPackage = require('dgeni-packages/nunjucks');
diff --git a/docs/typescript-package/index.js b/docs/typescript-package/index.js
index 1e35385349..def48537ae 100644
--- a/docs/typescript-package/index.js
+++ b/docs/typescript-package/index.js
@@ -1,5 +1,3 @@
-require('../../tools/transpiler/index.js').init();
-
 var basePackage = require('dgeni-packages/base');
 var Package = require('dgeni').Package;
 var path = require('canonical-path');
diff --git a/gulpfile.js b/gulpfile.js
index cd3695b23e..a166aab972 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -20,7 +20,6 @@ var licenseWrap = require('./tools/build/licensewrap');
 
 var watch = require('./tools/build/watch');
 
-var transpile = require('./tools/build/transpile');
 var pubget = require('./tools/build/pubget');
 var linknodemodules = require('./tools/build/linknodemodules');
 var pubbuild = require('./tools/build/pubbuild');
diff --git a/karma-js.conf.js b/karma-js.conf.js
index e0da7ccc17..373b659459 100644
--- a/karma-js.conf.js
+++ b/karma-js.conf.js
@@ -25,11 +25,12 @@ module.exports = function(config) {
       'node_modules/reflect-metadata/Reflect.js',
       'tools/build/file2modulename.js',
       'test-main.js',
-      {pattern: 'modules/**/test/**/static_assets/**', included: false, watched: false}      
+      {pattern: 'modules/**/test/**/static_assets/**', included: false, watched: false}
     ],
 
     exclude: [
       'dist/js/dev/es5/**/e2e_test/**',
+      'dist/js/dev/es5/rtts_assert/**',
       'dist/angular1_router.js'
     ],
 
@@ -40,11 +41,11 @@ module.exports = function(config) {
       startConnect: false,
       recordVideo: false,
       recordScreenshots: false,
-      options:  {
-          'selenium-version': '2.45.0',
-          'command-timeout': 600,
-          'idle-timeout': 600,
-          'max-duration': 5400
+      options: {
+        'selenium-version': '2.45.0',
+        'command-timeout': 600,
+        'idle-timeout': 600,
+        'max-duration': 5400
       }
     },
 
@@ -62,5 +63,3 @@ module.exports = function(config) {
     config.transports = ['xhr-polling'];
   }
 };
-
-
diff --git a/modules/angular2/test/compiler/eval_module.ts b/modules/angular2/test/compiler/eval_module.ts
index cf5adac986..98bda86bb5 100644
--- a/modules/angular2/test/compiler/eval_module.ts
+++ b/modules/angular2/test/compiler/eval_module.ts
@@ -16,7 +16,12 @@ export function evalModule(moduleSource: string, moduleImports: string[][], args
     var modName = sourceImport[0];
     var modAlias = sourceImport[1];
     importModuleNames.push(modName);
-    moduleSourceWithImports.push(`var ${modAlias} = require('${modName}');`);
+    // Note: After transpilation to commonJS and loading this file in a browser
+    // using SystemJS, the loader might get confused by the presence of require,
+    // and attempt to load "+ modName +.js" !?!
+    // A simple string concat manages to prevent that, but that is one compiler
+    // optimaztion away from breaking again. Proceed with caution!
+    moduleSourceWithImports.push(`var ${modAlias} = require` + `('${modName}');`);
   });
   moduleSourceWithImports.push(moduleSource);
 
diff --git a/modules/angular2_material/src/components/input/input.ts b/modules/angular2_material/src/components/input/input.ts
index 36a724b384..8fcc09909a 100644
--- a/modules/angular2_material/src/components/input/input.ts
+++ b/modules/angular2_material/src/components/input/input.ts
@@ -93,26 +93,3 @@ export class MdInput {
     ObservableWrapper.callNext(this.mdFocusChange, hasFocus);
   }
 }
-
-/*
-@Directive({
-  selector: 'md-input-container textarea',
-  events: ['mdChange', 'mdFocusChange'],
-  hostProperties: {
-    'yes': 'class.md-input'
-  },
-  hostListeners: {
-    'input': 'updateValue($event)',
-    'focus': 'setHasFocus(true)',
-    'blur': 'setHasFocus(false)'
-  }
-})
-export class MdTextarea extends MdInput {
-  constructor(
-      @Attribute('value') value: string,
-      @SkipSelf() @Host() container: MdInputContainer,
-      @Attribute('id') id: string) {
-    super(value, container, id);
-  }
-}
-*/
diff --git a/modules/benchmarks_external/src/tree/react/index.ts b/modules/benchmarks_external/src/tree/react/index.ts
index 7947c58675..4a11bba1be 100644
--- a/modules/benchmarks_external/src/tree/react/index.ts
+++ b/modules/benchmarks_external/src/tree/react/index.ts
@@ -1,6 +1,6 @@
 // tree benchmark in React
 import {getIntParameter, bindAction} from 'angular2/src/test_lib/benchmark_util';
-import React from './react.min';
+import * as React from './react.min';
 
 var TreeComponent = React.createClass({
   displayName: 'TreeComponent',
diff --git a/modules/benchmarks_external/src/tree/react/react.min.d.ts b/modules/benchmarks_external/src/tree/react/react.min.d.ts
index 661d8fb945..b4842fde0a 100644
--- a/modules/benchmarks_external/src/tree/react/react.min.d.ts
+++ b/modules/benchmarks_external/src/tree/react/react.min.d.ts
@@ -1,2 +1,2 @@
-declare var React: any;
-export default React;
+export var createElement: Function;
+export var render: Function;
diff --git a/modules/examples/e2e_test/sourcemap/sourcemap_spec.ts b/modules/examples/e2e_test/sourcemap/sourcemap_spec.ts
index 8fc9f7bcc4..40286fa3cb 100644
--- a/modules/examples/e2e_test/sourcemap/sourcemap_spec.ts
+++ b/modules/examples/e2e_test/sourcemap/sourcemap_spec.ts
@@ -34,15 +34,10 @@ describe('sourcemaps', function() {
 
       var originalPosition = decoder.originalPositionFor({line: errorLine, column: errorColumn});
 
-      var finalMapData = fs.readFileSync('dist/js/prod/es6/examples/src/sourcemap/index.js.map');
-      var finalDecoder = new sourceMap.SourceMapConsumer(JSON.parse(finalMapData));
-
-      var finalPosition = finalDecoder.originalPositionFor(originalPosition);
-
       var sourceCodeLines =
           fs.readFileSync('modules/examples/src/sourcemap/index.ts', {encoding: 'UTF-8'})
               .split('\n');
-      expect(sourceCodeLines[finalPosition.line - 1])
+      expect(sourceCodeLines[originalPosition.line - 1])
           .toMatch(/throw new BaseException\(\'Sourcemap test\'\)/);
     });
   });
diff --git a/tools/broccoli/traceur/index.ts b/tools/broccoli/traceur/index.ts
deleted file mode 100644
index cc82a14d9d..0000000000
--- a/tools/broccoli/traceur/index.ts
+++ /dev/null
@@ -1,56 +0,0 @@
-/// <reference path="../../typings/fs-extra/fs-extra.d.ts" />
-/// <reference path="../../typings/node/node.d.ts" />
-
-import fs = require('fs');
-import fse = require('fs-extra');
-import path = require('path');
-import {wrapDiffingPlugin, DiffingBroccoliPlugin, DiffResult} from '../diffing-broccoli-plugin';
-
-let traceur = require('../../../../tools/transpiler');
-let xtend = require('xtend');
-
-
-class DiffingTraceurCompiler implements DiffingBroccoliPlugin {
-  constructor(public inputPath: string, public cachePath: string, public options) {}
-
-  static includeExtensions = ['.js', '.cjs'];
-
-  rebuild(treeDiff: DiffResult) {
-    treeDiff.addedPaths.concat(treeDiff.changedPaths)
-        .forEach((changedFilePath) => {
-          var traceurOpts = xtend({filename: changedFilePath}, this.options.traceurOptions);
-
-          var fsOpts = {encoding: 'utf-8'};
-          var absoluteInputFilePath = path.join(this.inputPath, changedFilePath);
-          var sourcecode = fs.readFileSync(absoluteInputFilePath, fsOpts);
-
-          var result = traceur.compile(traceurOpts, changedFilePath, sourcecode);
-
-          // TODO: we should fix the sourceMappingURL written by Traceur instead of overriding
-          // (but we might switch to typescript first)
-          var mapFilepath =
-              changedFilePath.replace(/\.\w+$/, '') + this.options.destSourceMapExtension;
-          result.js = result.js + '\n//# sourceMappingURL=./' + path.basename(mapFilepath);
-
-          var destFilepath = changedFilePath.replace(/\.\w+$/, this.options.destExtension);
-          var destFile = path.join(this.cachePath, destFilepath);
-          fse.mkdirsSync(path.dirname(destFile));
-          fs.writeFileSync(destFile, result.js, fsOpts);
-
-          var destMap = path.join(this.cachePath, mapFilepath);
-          result.sourceMap.file = destFilepath;
-          fs.writeFileSync(destMap, JSON.stringify(result.sourceMap), fsOpts);
-        });
-
-    treeDiff.removedPaths.forEach((removedFilePath) => {
-      var destFilepath = removedFilePath.replace(/\.\w+$/, this.options.destExtension);
-      var absoluteOuputFilePath = path.join(this.cachePath, destFilepath);
-      fs.unlinkSync(absoluteOuputFilePath);
-    });
-  }
-}
-
-let transpileWithTraceur = wrapDiffingPlugin(DiffingTraceurCompiler);
-let TRACEUR_RUNTIME_PATH = traceur.RUNTIME_PATH;
-
-export {transpileWithTraceur as default, TRACEUR_RUNTIME_PATH};
diff --git a/tools/broccoli/trees/browser_tree.ts b/tools/broccoli/trees/browser_tree.ts
index 93653fd77b..ad15eb3d65 100644
--- a/tools/broccoli/trees/browser_tree.ts
+++ b/tools/broccoli/trees/browser_tree.ts
@@ -2,16 +2,16 @@
 
 var Funnel = require('broccoli-funnel');
 var htmlReplace = require('../html-replace');
-var jsReplace = require("../js-replace");
+var jsReplace = require('../js-replace');
 var path = require('path');
 var stew = require('broccoli-stew');
+var traceur = require('traceur');
 
 import compileWithTypescript from '../broccoli-typescript';
 import destCopy from '../broccoli-dest-copy';
 import flatten from '../broccoli-flatten';
 import mergeTrees from '../broccoli-merge-trees';
 import replace from '../broccoli-replace';
-import {default as transpileWithTraceur, TRACEUR_RUNTIME_PATH} from '../traceur/index';
 
 
 var projectRootDir = path.normalize(path.join(__dirname, '..', '..', '..', '..'));
@@ -83,13 +83,10 @@ module.exports = function makeBrowserTree(options, destinationPath) {
     ],
     destDir: '/'
   });
-  
+
   var es5ModulesTree = new Funnel('modules', {
     include: ['**/**'],
-    exclude: [
-      '**/*.cjs',
-      'benchmarks/e2e_test/**'
-    ],
+    exclude: ['**/*.cjs', 'angular1_router/**', 'benchmarks/e2e_test/**'],
     destDir: '/'
   });
 
@@ -117,7 +114,7 @@ module.exports = function makeBrowserTree(options, destinationPath) {
     sourceRoot: '.',
     target: 'ES6'
   });
-  
+
   // Use TypeScript to transpile the *.ts files to ES5
   var es5Tree = compileWithTypescript(es5ModulesTree, {
     allowNonTsExtensions: false,
@@ -125,7 +122,7 @@ module.exports = function makeBrowserTree(options, destinationPath) {
     emitDecoratorMetadata: true,
     experimentalDecorators: true,
     mapRoot: '',  // force sourcemaps to use relative path
-    module: 'System',
+    module: 'CommonJS',
     noEmitOnError: false,
     rootDir: '.',
     sourceMap: true,
@@ -133,7 +130,7 @@ module.exports = function makeBrowserTree(options, destinationPath) {
     target: 'ES5'
   });
 
-  // Now we add a few more files to the es6 tree that Traceur should not see
+  // Now we add a few more files to the es6 tree that the es5 tree should not see
   ['angular2', 'rtts_assert'].forEach(function(destDir) {
     var extras = new Funnel('tools/build', {files: ['es5build.js'], destDir: destDir});
     es6Tree = mergeTrees([es6Tree, extras]);
@@ -147,7 +144,7 @@ module.exports = function makeBrowserTree(options, destinationPath) {
       'node_modules/rx/dist/rx.js',
       'node_modules/base64-js/lib/b64.js',
       'node_modules/reflect-metadata/Reflect.js',
-      path.relative(projectRootDir, TRACEUR_RUNTIME_PATH)
+      path.relative(projectRootDir, traceur.RUNTIME_PATH)
     ]
   }));
 
diff --git a/tools/build/transpile.js b/tools/build/transpile.js
deleted file mode 100644
index 5a902645d6..0000000000
--- a/tools/build/transpile.js
+++ /dev/null
@@ -1,16 +0,0 @@
-var util = require('./util');
-var gulpTraceur = require('../transpiler/gulp-traceur');
-var file2moduleName = require('./file2modulename');
-
-module.exports = function(gulp, plugins, config) {
-  return function() {
-    return gulp.src(config.src)
-      .pipe(plugins.rename({extname: '.'+config.outputExt}))
-      .pipe(util.insertSrcFolder(plugins, config.srcFolderInsertion))
-      .pipe(gulpTraceur(
-        config.options,
-        file2moduleName)
-      )
-      .pipe(gulp.dest(config.dest));
-  };
-};
diff --git a/tools/transpiler/gulp-traceur.js b/tools/transpiler/gulp-traceur.js
deleted file mode 100644
index 42941fc30e..0000000000
--- a/tools/transpiler/gulp-traceur.js
+++ /dev/null
@@ -1,62 +0,0 @@
-'use strict';
-var through = require('through2');
-var compiler = require('./index');
-var path = require('path');
-
-module.exports = gulpTraceur;
-gulpTraceur.RUNTIME_PATH = compiler.RUNTIME_PATH;
-gulpTraceur.sourcesChanged = compiler.sourcesChanged;
-
-function gulpTraceur(options, resolveModuleName) {
-  options = options || {};
-
-  return through.obj(function (file, enc, done) {
-    if (file.isNull()) {
-      done();
-      return;
-    }
-
-    if (file.isStream()) {
-      throw new Error('gulp-traceur: Streaming not supported');
-    }
-
-    try {
-      var originalFilePath = file.history[0];
-      var moduleName = resolveModuleName ? resolveModuleName(file.relative) : null;
-      var result = compiler.compile(options, {
-        inputPath: originalFilePath,
-        outputPath: file.relative,
-        moduleName: moduleName
-      }, file.contents.toString());
-
-      var transpiledContent = result.js;
-      var sourceMap = result.sourceMap;
-
-      if (sourceMap) {
-        sourceMap.file = file.relative;
-        var sourceMapFile = cloneFile(file, {
-          path: file.path.replace(/\.\w+$/, '.map'),
-          contents: JSON.stringify(sourceMap)
-        });
-
-        transpiledContent += '\n//# sourceMappingURL=./' + path.basename(sourceMapFile.path);
-        this.push(sourceMapFile);
-      }
-
-      this.push(cloneFile(file, {contents: transpiledContent}));
-      done();
-    } catch (errors) {
-      if (errors.join) {
-         throw new Error('gulp-traceur:\n  ' + errors.join('\n  '));
-      } else {
-        console.error('Error when transpiling:\n  ' + originalFilePath);
-        throw errors;
-      }
-    }
-  });
-};
-
-function cloneFile(file, override) {
-  var File = file.constructor;
-  return new File({path: override.path || file.path, cwd: override.cwd || file.cwd, contents: new Buffer(override.contents || file.contents), base: override.base || file.base});
-}
diff --git a/tools/transpiler/index.js b/tools/transpiler/index.js
deleted file mode 100644
index c8b559937a..0000000000
--- a/tools/transpiler/index.js
+++ /dev/null
@@ -1,243 +0,0 @@
-// Entry point for Node.
-
-var fs = require('fs');
-var glob = require('glob');
-var path = require('path');
-var traceur = require('traceur');
-var assert = require('assert');
-
-exports.RUNTIME_PATH = traceur.RUNTIME_PATH;
-var TRACEUR_PATH = traceur.RUNTIME_PATH.replace('traceur-runtime.js', 'traceur.js');
-var SELF_SOURCE_REGEX = /transpiler\/src/;
-var SELF_COMPILE_OPTIONS = {
-  modules: 'register',
-  memberVariables: false,
-  moduleName: true,
-  script: false // parse as a module
-};
-
-var needsReload = true;
-var oldSystemGet = System.get;
-var currentOptions;
-
-exports.reloadSources = function() {
-  needsReload = true;
-};
-
-exports.compile = function compile(options, paths, source, reloadTraceur) {
-  if (needsReload) {
-    reloadCompiler(reloadTraceur);
-    needsReload = false;
-  }
-  var inputPath, outputPath, moduleName;
-  if (typeof paths === 'string') {
-    inputPath = outputPath = paths;
-  } else {
-    inputPath = paths.inputPath;
-    outputPath = paths.inputPath;
-    moduleName = paths.moduleName;
-  }
-  outputPath = outputPath || inputPath;
-  moduleName = moduleName || inputPath;
-  moduleName = moduleName.replace(/\.\w*$/, '');
-
-  var CompilerCls = System.get('transpiler/src/compiler').Compiler;
-
-  var compiler = new CompilerCls(options, moduleName);
-  currentOptions = options;
-  var result = {
-    js: compiler.compile(source, inputPath, outputPath),
-    sourceMap: null
-  };
-  currentOptions = null;
-
-  var sourceMapString = compiler.getSourceMap();
-  if (sourceMapString) {
-    result.sourceMap = JSON.parse(sourceMapString);
-  }
-
-  if (options.outputLanguage === 'es6' && source.indexOf('$traceurRuntime') === -1) {
-    assert(result.js.indexOf('$traceurRuntime') === -1,
-      'Transpile to ES6 must not add references to $traceurRuntime, '
-        + inputPath + ' is transpiled to:\n' + result.js);
-  }
-  return result;
-};
-
-exports.init = function() {
-  if (needsReload) {
-    reloadCompiler();
-    needsReload = false;
-  }
-}
-
-// Transpile and evaluate the code in `src`.
-// Use existing traceur to compile our sources.
-function reloadCompiler(reloadTraceur) {
-  if (reloadTraceur) {
-    loadModule(TRACEUR_PATH, false);
-  }
-  glob.sync(__dirname + '/src/**/*.js').forEach(function(fileName) {
-    loadModule(fileName, true);
-  });
-
-  // Traceur modules are register with the ".js" extension but we don't want
-  // to add it to all the import statements.
-  System.get = function get(normalizedName) {
-    var m = oldSystemGet.call(this, normalizedName);
-    if (!m && normalizedName.indexOf('traceur') == 0) {
-      m = oldSystemGet.call(this, normalizedName + '.js');
-    }
-    return m;
-  };
-
-  useRttsAssertModuleForConvertingTypesToExpressions();
-  supportSuperCallsInEs6Patch();
-  convertTypesToExpressionsInEs6Patch();
-  disableGetterSetterAssertionPatch();
-  patchCommonJSModuleTransformerToSupportExportStar();
-}
-
-function loadModule(filepath, transpile) {
-  var data = fs.readFileSync(filepath, 'utf8');
-
-  if (!data) {
-    throw new Error('Failed to import ' + filepath);
-  }
-
-  if (transpile) {
-    var moduleName = path.normalize(filepath)
-      .replace(__dirname, 'transpiler')
-      .replace(/\\/g, '/')
-      .replace(/\.\w*$/, '');
-    data = traceur.compile(data, SELF_COMPILE_OPTIONS, moduleName);
-  }
-
-  ('global', eval)(data);
-}
-
-function extend(source, props) {
-  var res = {};
-  for (var prop in source) {
-    res[prop] = source[prop];
-  }
-  for (var prop in props) {
-    res[prop] = props[prop];
-  }
-  return res;
-}
-
-// TODO(tbosch): remove when traceur is fixed.
-// see https://github.com/google/traceur-compiler/issues/1700
-function supportSuperCallsInEs6Patch() {
-  var traceurVersion = System.map['traceur'];
-  var ParseTreeMapWriter = System.get(traceurVersion+'/src/outputgeneration/ParseTreeMapWriter').ParseTreeMapWriter;
-  var _enterBranch = ParseTreeMapWriter.prototype.enterBranch;
-  ParseTreeMapWriter.prototype.enterBranch = function(location) {
-    if (!location.start) {
-      // This would throw...
-      return;
-    }
-    return _enterBranch.apply(this, arguments);
-  }
-}
-
-// TODO(tbosch): Remove when traceur is fixed.
-// see https://github.com/google/traceur-compiler/issues/1699
-function convertTypesToExpressionsInEs6Patch() {
-  var traceurVersion = System.map['traceur'];
-  var TypeToExpressionTransformer = System.get(traceurVersion+'/src/codegeneration/TypeToExpressionTransformer').TypeToExpressionTransformer;
-  var PureES6Transformer = System.get(traceurVersion+'/src/codegeneration/PureES6Transformer').PureES6Transformer;
-  var UniqueIdentifierGenerator = System.get(traceurVersion+'/src/codegeneration/UniqueIdentifierGenerator').UniqueIdentifierGenerator;
-
-  var _transform = PureES6Transformer.prototype.transform;
-  PureES6Transformer.prototype.transform = function() {
-    if (!this._patched) {
-      this._patched = true;
-      var self = this;
-      this.treeTransformers_.splice(0,0, function(tree) {
-        return new TypeToExpressionTransformer(new UniqueIdentifierGenerator(), self.reporter_, self.options_).transformAny(tree);
-      });
-    }
-    return _transform.apply(this, arguments);
-  };
-}
-
-// TODO(tbosch): Disable getter/setters for assertions until traceur has a flag
-// that allows to disable them while keeping assertions and member fields enabled.
-// see https://github.com/google/traceur-compiler/issues/1625
-// Why:
-// - traceur uses field names based on numbers, which can lead to collisions when creating a subclass in a separate compiler run.
-// - this rename of fields makes debugging via the repl harder (e.g. via DevTools console)
-// - this rename can break JSON conversion of instances
-function disableGetterSetterAssertionPatch() {
-  var traceurVersion = System.map['traceur'];
-  var MemberVariableTransformer = System.get(traceurVersion+'/src/codegeneration/MemberVariableTransformer').MemberVariableTransformer;
-  var AnonBlock = System.get(traceurVersion+'/src/syntax/trees/ParseTrees.js').AnonBlock;
-  MemberVariableTransformer.prototype.transformPropertyVariableDeclaration = function(tree) {
-    return new AnonBlock(tree.location, []);
-  }
-}
-
-// TODO(tbosch): Get all types from `assert` module and not from `$traceurRuntime`.
-// With this a transpile to ES6 does no more include the `$traceurRuntime`.
-// see https://github.com/google/traceur-compiler/issues/1706
-function useRttsAssertModuleForConvertingTypesToExpressions() {
-  var traceurVersion = System.map['traceur'];
-  var original = System.get(traceurVersion+'/src/codegeneration/TypeToExpressionTransformer').TypeToExpressionTransformer;
-  var patch = System.get('transpiler/src/patch/TypeToExpressionTransformer').TypeToExpressionTransformer;
-  for (var prop in patch.prototype) {
-    original.prototype[prop] = patch.prototype[prop];
-  }
-  original.prototype.getOptions = function() { return currentOptions; };
-
-  var TypeAssertionTransformer = System.get(traceurVersion+'/src/codegeneration/TypeAssertionTransformer').TypeAssertionTransformer;
-  var createIdentifierExpression = System.get(traceurVersion+'/src/codegeneration/ParseTreeFactory').createIdentifierExpression;
-  var parseExpression = System.get(traceurVersion+'/src/codegeneration/PlaceholderParser.js').parseExpression;
-  TypeAssertionTransformer.prototype.transformBindingElementParameter_ = function(element, typeAnnotation) {
-    // Copied from https://github.com/google/traceur-compiler/commits/master/src/codegeneration/TypeAssertionTransformer.js
-    if (!element.binding.isPattern()) {
-      if (typeAnnotation) {
-        this.paramTypes_.atLeastOneParameterTyped = true;
-      } else {
-        // PATCH start
-        var typeModule = currentOptions.outputLanguage === 'es6' ? 'assert' : '$traceurRuntime';
-        typeAnnotation = parseExpression([typeModule + ".type.any"]);
-        // PATCH end
-      }
-
-      this.paramTypes_.arguments.push(
-        createIdentifierExpression(element.binding.identifierToken),
-        typeAnnotation);
-      return;
-    }
-
-    // NYI
-  }
-}
-
-// TODO(tbosch): patch exports for CommonJS to support `export * from ...`
-// see https://github.com/google/traceur-compiler/issues/1042
-function patchCommonJSModuleTransformerToSupportExportStar() {
-  var traceurVersion = System.map['traceur'];
-  var CommonJsModuleTransformer = System.get(traceurVersion+'/src/codegeneration/CommonJsModuleTransformer').CommonJsModuleTransformer;
-  var parseStatement = System.get(traceurVersion+'/src/codegeneration/PlaceholderParser.js').parseStatement;
-  var prependStatements = System.get(traceurVersion+"/src/codegeneration/PrependStatements.js").prependStatements;
-
-  var _wrapModule = CommonJsModuleTransformer.prototype.wrapModule;
-  CommonJsModuleTransformer.prototype.wrapModule = function(statements) {
-    if (this.hasStarExports()) {
-      var last = statements[statements.length - 1];
-      statements = statements.slice(0, -1);
-      var exportObject = last.expression;
-      if (exportObject.propertyNameAndValues) {
-        throw new Error('Don\'t support export * with named exports right now...');
-      }
-      statements.push(parseStatement(['module.exports = ', ';'], exportObject));
-      return statements;
-    } else {
-      return _wrapModule.apply(this, arguments);
-    }
-  }
-}
-
diff --git a/tools/transpiler/spec/a-0-subfolder/library_spec.js b/tools/transpiler/spec/a-0-subfolder/library_spec.js
deleted file mode 100644
index f0ed26b348..0000000000
--- a/tools/transpiler/spec/a-0-subfolder/library_spec.js
+++ /dev/null
@@ -1 +0,0 @@
-export function main() {}
diff --git a/tools/transpiler/spec/annotations_spec.js b/tools/transpiler/spec/annotations_spec.js
deleted file mode 100644
index 2486385fca..0000000000
--- a/tools/transpiler/spec/annotations_spec.js
+++ /dev/null
@@ -1,78 +0,0 @@
-import {describe, it, expect, iit} from 'angular2/test_lib';
-import {readFirstAnnotation} from './fixtures/annotations';
-import {CONST} from 'angular2/src/core/facade/lang';
-
-class Inject {}
-class Bar {}
-
-class Provide {
-  token;
-
-  @CONST()
-  constructor(token) {
-    this.token = token;
-  }
-}
-
-class AnnotateMe {
-  maybe;
-
-  @CONST()
-  constructor({maybe = 'default'} = {}) {
-    this.maybe = maybe;
-  }
-}
-
-
-@Provide('Foo')
-class Foo {
-  @Inject
-  constructor() {}
-}
-
-@Provide(Foo)
-function baz() {}
-
-@AnnotateMe()
-class A {}
-
-@AnnotateMe({maybe: 'yes'})
-class B {}
-
-@AnnotateMe({maybe: {'a': 'b'}})
-class SomeClassWithMapInAnnotation {}
-
-@AnnotateMe({maybe: [23]})
-class SomeClassWithListInAnnotation {}
-
-@AnnotateMe({maybe: new Provide(0)})
-class SomeClassWithConstObject {}
-
-function annotatedParams(@Inject(Foo) f, @Inject(Bar) b) {}
-
-export function main() {
-  describe('annotations', function() {
-    it('should work', function() {
-      // Assert `Foo` class has `Provide` annotation.
-      var clazz = readFirstAnnotation(Foo);
-      expect(clazz instanceof Provide).toBe(true);
-    });
-
-    it('should work with named arguments', function() {
-      expect(readFirstAnnotation(A).maybe).toBe('default');
-      expect(readFirstAnnotation(B).maybe).toBe('yes');
-    });
-
-    it('should work with maps in named arguments', () => {
-      expect(readFirstAnnotation(SomeClassWithMapInAnnotation).maybe).toEqual({'a': 'b'});
-    });
-
-    it('should work with lists in named arguments', () => {
-      expect(readFirstAnnotation(SomeClassWithListInAnnotation).maybe).toEqual([23]);
-    });
-
-    it('should work with new instances in named arguments', () => {
-      expect(readFirstAnnotation(SomeClassWithConstObject).maybe).toEqual(new Provide(0));
-    });
-  });
-}
diff --git a/tools/transpiler/spec/arrow_functions_spec.js b/tools/transpiler/spec/arrow_functions_spec.js
deleted file mode 100644
index 60a9e28bb1..0000000000
--- a/tools/transpiler/spec/arrow_functions_spec.js
+++ /dev/null
@@ -1,63 +0,0 @@
-import {describe, it, expect, iit} from 'angular2/test_lib';
-
-var inc = x => x + 1;
-
-var objLiteral = val => ({'key': val});
-
-var max = (a, b) => {
-  if (a > b) {
-    return a;
-  } else {
-    return b;
-  }
-};
-
-var namedFn = function({fn}) {
-  return fn();
-}
-
-class LexicalThis {
-  zero;
-
-  constructor() {
-    this.zero = 0;
-  }
-
-  getZero() {
-    return (() => this.zero)();
-  }
-}
-
-export function main() {
-  describe('arrow functions', function() {
-    it('should support implicit return', function() {
-      expect(inc(0)).toBe(1);
-    });
-
-    it('should support implicit return in named arguments', function() {
-      expect(namedFn({fn: () => 1})).toBe(1);
-    });
-
-    it('should support object literal', function() {
-      var o = objLiteral('val');
-      expect(o['key']).toBe('val');
-    });
-
-    it('should support complex body', function() {
-      expect(max(0, 1)).toBe(1);
-      expect(max(1, 0)).toBe(1);
-    });
-
-    it('should support complex body in named arguments', function() {
-      expect(namedFn({fn: () => {
-        return 1;
-      }})).toBe(1);
-    });
-
-    it('should support lexical this', function() {
-      var lthis = new LexicalThis();
-      expect(lthis.getZero()).toBe(0);
-    });
-
-  });
-}
diff --git a/tools/transpiler/spec/bar.js b/tools/transpiler/spec/bar.js
deleted file mode 100644
index ee9c96d3ba..0000000000
--- a/tools/transpiler/spec/bar.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export var Bar1 = 'BAR1';
-export var Bar2 = 'BAR2';
-export function Bar3() {}
diff --git a/tools/transpiler/spec/baz.js b/tools/transpiler/spec/baz.js
deleted file mode 100644
index 280a56ac4d..0000000000
--- a/tools/transpiler/spec/baz.js
+++ /dev/null
@@ -1 +0,0 @@
-export var Baz = 'BAZ';
diff --git a/tools/transpiler/spec/classes_spec.js b/tools/transpiler/spec/classes_spec.js
deleted file mode 100644
index d03fd3aa3b..0000000000
--- a/tools/transpiler/spec/classes_spec.js
+++ /dev/null
@@ -1,108 +0,0 @@
-import {ddescribe, describe, it, expect} from 'angular2/test_lib';
-import {CONST} from './fixtures/annotations';
-
-class Foo {
-  a;
-  b;
-
-  constructor(a, b) {
-    this.a = a;
-    this.b = b;
-  }
-
-  sum() {
-    return this.a + this.b;
-  }
-}
-
-class SubFoo extends Foo {
-  c;
-
-  constructor(a, b) {
-    super(a, b);
-    this.c = 3;
-  }
-}
-
-class ConstClass {}
-
-class Const {
-  a;
-
-  @CONST
-  constructor(a:number) {
-    this.a = a;
-  }
-}
-
-class SubConst extends Const {
-  b;
-
-  @CONST
-  constructor(a:number, b:number) {
-    super(a);
-    this.b = b;
-  }
-}
-
-class HasGetters {
-  get getter():string {
-    return 'getter';
-  }
-
-  static get staticGetter():string {
-    return 'getter';
-  }
-}
-
-class WithFields {
-  name: string;
-  static id: number;
-}
-
-export function main() {
-  describe('classes', function() {
-    it('should work', function() {
-      var foo = new Foo(2, 3);
-
-      expect(foo.a).toBe(2);
-      expect(foo.b).toBe(3);
-      expect(foo.sum()).toBe(5);
-    });
-
-    it('@CONST should be transpiled to a const constructor', function() {
-      var subConst = new SubConst(1, 2);
-      expect(subConst.a).toBe(1);
-      expect(subConst.b).toBe(2);
-    });
-
-    describe('inheritance', function() {
-      it('should support super call', function () {
-        var subFoo = new SubFoo(1, 2);
-        expect(subFoo.a).toBe(1);
-        expect(subFoo.b).toBe(2);
-        expect(subFoo.c).toBe(3);
-      });
-    });
-
-    describe("getters", function () {
-      it("should call instance getters", function () {
-        var obj = new HasGetters();
-        expect(obj.getter).toEqual('getter');
-      });
-
-      it("should call static getters", function () {
-        expect(HasGetters.staticGetter).toEqual('getter');
-      });
-    });
-
-    describe('fields', function() {
-      it('should work', function() {
-        var obj = new WithFields();
-        obj.name = 'Vojta';
-        WithFields.id = 12;
-      });
-    });
-  });
-
-}
diff --git a/tools/transpiler/spec/cycle.js b/tools/transpiler/spec/cycle.js
deleted file mode 100644
index 9cc2a4842b..0000000000
--- a/tools/transpiler/spec/cycle.js
+++ /dev/null
@@ -1,5 +0,0 @@
-import {foo} from './cycle_spec';
-
-export function cycle() {
-  return foo;
-}
diff --git a/tools/transpiler/spec/cycle_spec.js b/tools/transpiler/spec/cycle_spec.js
deleted file mode 100644
index 50fa4c743a..0000000000
--- a/tools/transpiler/spec/cycle_spec.js
+++ /dev/null
@@ -1,13 +0,0 @@
-import {describe, it, expect} from 'angular2/test_lib';
-import {cycle} from './cycle';
-
-export function main() {
-  describe('cycle', function() {
-    it('should work', function() {
-      expect(cycle()).toBe(true);
-    });
-  });
-}
-
-export var foo = true;
-
diff --git a/tools/transpiler/spec/equals_spec.js b/tools/transpiler/spec/equals_spec.js
deleted file mode 100644
index d296c495ef..0000000000
--- a/tools/transpiler/spec/equals_spec.js
+++ /dev/null
@@ -1,22 +0,0 @@
-import {describe, it, expect} from 'angular2/test_lib';
-
-function same(a, b) {
-  return a === b;
-}
-
-function notSame(a, b) {
-  if ((a !== a) && (b !== b)) return true;
-  return a !== b;
-}
-
-export function main() {
-  describe('equals', function() {
-    it('should work', function() {
-      var obj = {};
-      expect(same({}, {}) == false).toBe(true);
-      expect(same(obj, obj) == true).toBe(true);
-      expect(notSame({}, {}) == true).toBe(true);
-      expect(notSame(obj, obj) == false).toBe(true);
-    });
-  });
-}
diff --git a/tools/transpiler/spec/export.js b/tools/transpiler/spec/export.js
deleted file mode 100644
index 27d3ded4d9..0000000000
--- a/tools/transpiler/spec/export.js
+++ /dev/null
@@ -1,2 +0,0 @@
-export * from './foo';
-export {Bar1, Bar2} from './bar';
diff --git a/tools/transpiler/spec/fixtures/annotations.dart b/tools/transpiler/spec/fixtures/annotations.dart
deleted file mode 100644
index e66506490b..0000000000
--- a/tools/transpiler/spec/fixtures/annotations.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-import 'dart:mirrors';
-
-// TODO: this api does not yet return an array as we don't have
-// a nice array wrapper for Dart
-readFirstAnnotation(clazz) {
-  return reflectClass(clazz).metadata.first.reflectee;
-}
diff --git a/tools/transpiler/spec/fixtures/annotations.es6 b/tools/transpiler/spec/fixtures/annotations.es6
deleted file mode 100644
index 15de650d28..0000000000
--- a/tools/transpiler/spec/fixtures/annotations.es6
+++ /dev/null
@@ -1,5 +0,0 @@
-// TODO: this api does not yet return an array as we don't have
-// a nice array wrapper for Dart
-export function readFirstAnnotation(clazz) {
-  return clazz.annotations[0];
-}
diff --git a/tools/transpiler/spec/fixtures/facade.dart b/tools/transpiler/spec/fixtures/facade.dart
deleted file mode 100644
index eea66dad1c..0000000000
--- a/tools/transpiler/spec/fixtures/facade.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-import 'dart:collection';
-
-class MapWrapper {
-
-}
-
-/**
- * Generic iterable class to test for-of.  Provides iteration of the given list.
- */
-class IterableList extends IterableBase {
-  List values;
-  IterableList(values) {
-    this.values = values;
-  }
-  Iterator get iterator => values.iterator;
-}
diff --git a/tools/transpiler/spec/fixtures/facade.es6 b/tools/transpiler/spec/fixtures/facade.es6
deleted file mode 100644
index eb7cfca896..0000000000
--- a/tools/transpiler/spec/fixtures/facade.es6
+++ /dev/null
@@ -1,18 +0,0 @@
-export class MapWrapper {
-
-}
-
-/**
- * Generic iterable class to test for-of.  Provides iteration of the given array.
- */
-export class IterableList {
-  constructor(values) {
-    this.values = values;
-  }
-
-  *[Symbol.iterator]() {
-    for (var value of this.values) {
-      yield value;
-    }
-  }
-}
diff --git a/tools/transpiler/spec/foo.js b/tools/transpiler/spec/foo.js
deleted file mode 100644
index 3ffe6809d6..0000000000
--- a/tools/transpiler/spec/foo.js
+++ /dev/null
@@ -1,2 +0,0 @@
-export var Foo = 'FOO';
-export var Bar = 'BAR';
diff --git a/tools/transpiler/spec/functions_spec.js b/tools/transpiler/spec/functions_spec.js
deleted file mode 100644
index c1cd004f8a..0000000000
--- a/tools/transpiler/spec/functions_spec.js
+++ /dev/null
@@ -1,69 +0,0 @@
-import {describe, ddescribe, it, iit, expect} from 'angular2/test_lib';
-
-function sum(a, b) {
-  return a + b;
-}
-
-class ConstructorWithNamedParams {
-  sum;
-
-  constructor(a, {b=1, c=2}) {
-    this.sum = a + b + c;
-  }
-}
-
-export function main() {
-  describe('functions', function() {
-    it('should work', function() {
-      expect(sum(1, 2)).toBe(3);
-    });
-
-    describe("named parameters", function() {
-      it('should pass named params as named params by using identifier keys', function() {
-        function f(a, {b, c}) {return a + b + c;}
-        expect(f(1, {b: 2, c: 3})).toBe(6);
-      });
-
-      it('should pass named params as a map by using quoted keys', function() {
-        function f(m) {return m["a"] + m["b"];}
-
-        expect(f({"a": 1, "b": 2})).toBe(3);
-      });
-
-      it('should compile initializers', function() {
-        function f({a=1, b=2}) {return a + b;}
-        expect(f({a:10})).toBe(12);
-      });
-
-      it("should call function with named params without passing any" +
-        "params by providing an empty object initializer", function() {
-        function f({a=1, b=2}={}) {return a + b;}
-
-        expect(f({a: 10})).toBe(12);
-        expect(f()).toBe(3);
-      });
-
-      it("should support new expressions", function () {
-        var obj = new ConstructorWithNamedParams(100, {b:10});
-        expect(obj.sum).toEqual(112);
-      });
-    });
-    
-    describe("optional params", function () {
-      it("should work", function () {
-        function optional(a=1,b=2){return a + b;}
-
-        expect(optional()).toEqual(3);
-        expect(optional(10)).toEqual(12);
-        expect(optional(10, 20)).toEqual(30);
-      });
-
-      it("should support a mix of optional and mandatory params", function () {
-        function optional(a,b=2){return a + b;}
-
-        expect(optional(1)).toEqual(3);
-        expect(optional(10)).toEqual(12);
-      });
-    });
-  });
-}
diff --git a/tools/transpiler/spec/instance_of_spec.js b/tools/transpiler/spec/instance_of_spec.js
deleted file mode 100644
index 2f76bc3d45..0000000000
--- a/tools/transpiler/spec/instance_of_spec.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import {describe, it, expect} from 'angular2/test_lib';
-
-class Foo {}
-
-export function main() {
-  describe('instanceof', function() {
-    it('should work', function() {
-      expect(new Foo() instanceof Foo);
-    });
-  });
-}
diff --git a/tools/transpiler/spec/interfaces_spec.js b/tools/transpiler/spec/interfaces_spec.js
deleted file mode 100644
index 5b695f6c5e..0000000000
--- a/tools/transpiler/spec/interfaces_spec.js
+++ /dev/null
@@ -1,26 +0,0 @@
-import {ddescribe, describe, it, iit, expect} from 'angular2/test_lib';
-import {IMPLEMENTS} from './fixtures/annotations';
-
-class Interface1 {
-  one(){}
-}
-class Interface2 {
-  two(){}
-}
-
-@IMPLEMENTS(Interface1, Interface2)
-class SomeClass {
-  one(){}
-  two(){}
-}
-
-export function main() {
-  describe('interfaces', function() {
-    it('should work', function () {
-      var s = new SomeClass();
-      expect(s).toImplement(Interface1);
-      expect(s).toImplement(Interface2);
-    });
-  });
-
-}
diff --git a/tools/transpiler/spec/lang_spec.js b/tools/transpiler/spec/lang_spec.js
deleted file mode 100644
index cf66f4b47e..0000000000
--- a/tools/transpiler/spec/lang_spec.js
+++ /dev/null
@@ -1,14 +0,0 @@
-import {describe, it, expect} from 'angular2/test_lib';
-
-export function main() {
-  describe('lang', function() {
-    it('string interpolation', function() {
-      expect(`${123}-'${456}"`).toEqual('123-\'456"');
-    });
-
-    it('multiline string', function () {
-      expect(`1'
-2"`).toEqual('1\'\n2"');
-    });
-  });
-}
diff --git a/tools/transpiler/spec/reexport.js b/tools/transpiler/spec/reexport.js
deleted file mode 100644
index c7b8a12d63..0000000000
--- a/tools/transpiler/spec/reexport.js
+++ /dev/null
@@ -1,6 +0,0 @@
-import {Baz} from './baz';
-import {Bar1} from './bar';
-
-export {Baz} from './baz';
-
-var localVar = true;
diff --git a/tools/transpiler/spec/types_spec.js b/tools/transpiler/spec/types_spec.js
deleted file mode 100644
index 08dbb60234..0000000000
--- a/tools/transpiler/spec/types_spec.js
+++ /dev/null
@@ -1,94 +0,0 @@
-import {describe, xdescribe, it, expect} from 'angular2/test_lib';
-
-class A {}
-class B {}
-
-function sum(a: number, b: number): number {
-  return a + b;
-}
-
-function not(a: boolean): boolean {
-  return !a;
-}
-
-function generics(a: A<B>) {
-
-}
-
-function namedObjectType({a,b}:{a:A,b:B<C>}) {
-
-}
-
-class Bar {
-  constructor({
-      selector,
-      implementsTypes
-    })
-  {
-  }
-}
-
-class Foo {
-  a;
-  b;
-
-  constructor(a: number, b: number) {
-    this.a = a;
-    this.b = b;
-  }
-
-  sum(): number {
-    return this.a + this.b;
-  }
-
-  typedVariables() {
-    var foo:string = 'foo';
-  }
-}
-
-class WithFields {
-  name: string;
-  static id: number;
-  untyped;
-  static staticUntyped;
-}
-
-
-export function main() {
-  describe('types', function() {
-    it('should work', function() {
-      // TODO(vojta): test this better.
-      var f = new Foo(1, 2);
-      assert(f.sum() == 3);
-      assert(f instanceof Foo);
-
-      f.typedVariables();
-    });
-
-    xdescribe('class fields', function() {
-      it('should fail when setting wrong type value', function() {
-        var wf = new WithFields();
-
-        expect(function() {
-          wf.name = true;
-        }).toThrowError(
-          // TODO(vojta): Better error, it's not first argument, it's setting a field.
-          'Invalid arguments given!\n' +
-          '  - 1st argument has to be an instance of string, got true'
-        );
-      });
-    });
-
-    xdescribe('static class fields', function() {
-      it('should fail when setting wrong type value', function() {
-        expect(function() {
-          WithFields.id = true;
-        }).toThrowError(
-          // TODO(vojta): Better error, it's not first argument, it's setting a field.
-          'Invalid arguments given!\n' +
-          '  - 1st argument has to be an instance of number, got true'
-        );
-      });
-    });
-  });
-}
diff --git a/tools/transpiler/src/compiler.js b/tools/transpiler/src/compiler.js
deleted file mode 100644
index 7448566bbe..0000000000
--- a/tools/transpiler/src/compiler.js
+++ /dev/null
@@ -1,36 +0,0 @@
-import {Compiler as TraceurCompiler} from 'traceur/src/Compiler';
-import {CollectingErrorReporter} from 'traceur/src/util/CollectingErrorReporter';
-import {Parser} from './parser';
-import {SourceFile} from 'traceur/src/syntax/SourceFile';
-import {Options} from 'traceur/src/Options';
-
-export class Compiler extends TraceurCompiler {
-
-  constructor(options, sourceRoot) {
-    super(options, sourceRoot);
-    this.moduleName_ = sourceRoot;
-  }
-
-  // Copy of the original method to use our custom Parser
-  parse(content, sourceName) {
-    if (!content) {
-      throw new Error('Compiler: no content to compile.');
-    } else if (!sourceName) {
-      throw new Error('Compiler: no source name for content.');
-    }
-
-    this.sourceMapGenerator_ = null;
-    var traceurOptions = new Options();
-    // Here we mutate the global/module options object to be used in parsing.
-    traceurOptions.setFromObject(this.options_);
-
-    var errorReporter = new CollectingErrorReporter();
-    sourceName = this.sourceName(sourceName);
-    var sourceFile = new SourceFile(sourceName, content);
-    var parser = new Parser(sourceFile, errorReporter, this.options_);
-    var tree =
-        this.options_.script ? parser.parseScript() : parser.parseModule();
-    this.throwIfErrors(errorReporter);
-    return tree;
-  }
-}
diff --git a/tools/transpiler/src/parser.js b/tools/transpiler/src/parser.js
deleted file mode 100644
index 02c598adb2..0000000000
--- a/tools/transpiler/src/parser.js
+++ /dev/null
@@ -1,23 +0,0 @@
-import {Parser as TraceurParser} from 'traceur/src/syntax/Parser';
-import {SyntaxErrorReporter} from 'traceur/src/util/SyntaxErrorReporter';
-import {TypeName, ImportSpecifier, ImportedBinding, BindingIdentifier} from 'traceur/src/syntax/trees/ParseTrees';
-import {PERIOD, IMPORT, STAR, AS, FROM, CLOSE_ANGLE, OPEN_ANGLE, COMMA, OPEN_CURLY, CLOSE_CURLY, COLON} from 'traceur/src/syntax/TokenType';
-
-export class Parser extends TraceurParser {
-  constructor(file, errorReporter = new SyntaxErrorReporter(), options) {
-    super(file, errorReporter, options);
-  }
-
-  // TODO: add support for object type literals to traceur!
-  parseObjectType_() {
-   this.eat_(OPEN_CURLY);
-   do {
-     var identifier = this.eatId_();
-     this.eat_(COLON);
-     var type = this.parseNamedOrPredefinedType_();
-     var typeParameters = this.parseTypeParametersOpt_();
-     // TODO(misko): save the type information
-   } while (this.eatIf_(COMMA));
-   this.eat_(CLOSE_CURLY);
- }
-}
diff --git a/tools/transpiler/src/patch/TypeToExpressionTransformer.js b/tools/transpiler/src/patch/TypeToExpressionTransformer.js
deleted file mode 100644
index d26f503022..0000000000
--- a/tools/transpiler/src/patch/TypeToExpressionTransformer.js
+++ /dev/null
@@ -1,51 +0,0 @@
-// Based on https://github.com/google/traceur-compiler/blob/master/src/codegeneration/TypeToExpressionTransformer.js
-// Copyright 2012 Traceur Authors.
-// Licensed under the Apache License, Version 2.0 (the 'License');
-//
-// Modifications:
-// - use `assert` import, instead of `$traceurRuntime....` so
-//   that a transpilation to ES6 does not contain any traceur references.
-import {ParseTreeTransformer} from 'traceur/src/codegeneration/ParseTreeTransformer.js';
-import {
-  ArgumentList,
-  IdentifierExpression,
-  MemberExpression
-} from 'traceur/src/syntax/trees/ParseTrees.js';
-import {
-  parseExpression
-} from 'traceur/src/codegeneration/PlaceholderParser.js';
-
-export class TypeToExpressionTransformer extends ParseTreeTransformer {
-  // Not used. Just required to call super() by traceur.
-  constructor(idGenerator, reporter, options) {
-    super(idGenerator, reporter);
-  }
-
-  typeModule() {
-    return parseExpression([this.getOptions().outputLanguage === 'es6' ? 'assert' : '$traceurRuntime']);
-  }
-
-  transformTypeName(tree) {
-    if (tree.moduleName) {
-      var operand = this.transformAny(tree.moduleName);
-      return new MemberExpression(tree.location, operand, tree.name);
-    }
-    return new IdentifierExpression(tree.location, tree.name);
-  }
-
-  transformPredefinedType(tree) {
-    return parseExpression `${this.typeModule()}.type.${tree.typeToken})`;
-  }
-
-  transformTypeReference(tree) {
-    var typeName = this.transformAny(tree.typeName);
-    var args = this.transformAny(tree.args);
-    var argumentList = new ArgumentList(tree.location, [typeName, ...args]);
-    return parseExpression `${this.typeModule()}.genericType(${argumentList})`;
-  }
-
-  transformTypeArguments(tree) {
-    return this.transformList(tree.args);
-  }
-
-}
diff --git a/tools/transpiler/unittest/transpilertests.js b/tools/transpiler/unittest/transpilertests.js
deleted file mode 100644
index e7fff5dca6..0000000000
--- a/tools/transpiler/unittest/transpilertests.js
+++ /dev/null
@@ -1,135 +0,0 @@
-var compiler = require('../index');
-var temp = require('temp');
-var fs = require('fs');
-
-temp.track();
-
-var DEFAULT_OPTIONS = {
-  sourceMaps: false,
-  annotations: true, // parse annotations
-  types: true, // parse types
-  script: false, // parse as a module
-  memberVariables: true // parse class fields
-};
-
-describe('transpile to es6', function() {
-  var options;
-
-  beforeEach(function() {
-    options = merge(DEFAULT_OPTIONS, {outputLanguage: 'es6', typeAssertions: 'true'});
-  });
-
-  it('should preserve generic type information', function() {
-    var result = compiler.compile(options, "test.js",
-      "function f(a:List<string>){}");
-    expect(result.js).toBe('function f(a) {\n'+
-      '  assert.argumentTypes(a, assert.genericType(List, assert.type.string));\n'+
-      '}\n'+
-      'Object.defineProperty(f, "parameters", {get: function() {\n'+
-      '    return [[assert.genericType(List, assert.type.string)]];\n'+
-      '  }});\n');
-  });
-
-
-  it('should allow super() calls when transpiling to ES6 with source maps', function() {
-    options = merge(options, {sourceMaps: true});
-    var result = compiler.compile(options, "test.js",
-      "class Base {}\n" +
-      "class Test extends Base {" +
-      "  constructor() { super(); }" +
-      "}");
-    expect(result.js).toBe("class Base {}\n" +
-      "class Test extends Base {\n" +
-      "  constructor() {\n"+
-      "    super();\n"+
-      "  }\n"+
-      "}\n"+
-      "//# sourceMappingURL=test.js.map\n");
-  });
-
-  it('should convert types to expressions', function() {
-    var result = compiler.compile(options, "test.js",
-      "function f(a:string) {}");
-    expect(result.js).toBe('function f(a) {\n'+
-      '  assert.argumentTypes(a, assert.type.string);\n'+
-      '}\n' +
-      'Object.defineProperty(f, "parameters", {get: function() {\n' +
-      '    return [[assert.type.string]];\n' +
-      '  }});\n');
-  });
-
-  it('should not convert type properties to getter/setters', function() {
-    var result = compiler.compile(options, "test.js",
-      "class Test {" +
-      "  constructor() { this.a = 1; }" +
-      "}");
-    expect(result.js).toBe("class Test {\n" +
-      "  constructor() {\n"+
-      "    this.a = 1;\n"+
-      "  }\n"+
-      "}\n");
-  });
-
-  it('should remove class field declarations', function() {
-    var result = compiler.compile(options, "test.js",
-      "class Test {" +
-      "  a:number = 1;" +
-      "}");
-    expect(result.js).toBe("class Test {}\n");
-  });
-
-  it('should convert types to expressions on "assert" module', function() {
-    var result = compiler.compile(options, "test.js",
-      "function f(a:string, b) { return a+b; }");
-    expect(result.js).toBe('function f(a, b) {\n'+
-      '  assert.argumentTypes(a, assert.type.string, b, assert.type.any);\n'+
-      '  return a + b;\n'+
-      '}\n'+
-      'Object.defineProperty(f, "parameters", {get: function() {\n'+
-      '    return [[assert.type.string], []];\n'+
-      '  }});\n');
-  });
-
-});
-
-describe('transpile to cjs', function() {
-  var options;
-
-  beforeEach(function() {
-    options = merge(DEFAULT_OPTIONS, {modules: 'commonjs'});
-  });
-
-  function compileAndWrite(input) {
-    var transpiledCode = compiler.compile(options, "test.js", input).js;
-    var tempPath = temp.path({prefix: "ng2transpiler", suffix: ''});
-    var fd = fs.openSync(tempPath, 'w+');
-    fs.writeSync(fd, transpiledCode);
-    fs.closeSync(fd);
-    return tempPath.replace(/\\/g, '/');
-  }
-
-  it('should transpile export *', function() {
-    var file1 = compileAndWrite('export var a = 1');
-    var file2 = compileAndWrite('export * from "' + file1 + '"');
-    expect(require(file2).a).toBe(1);
-  });
-
-  it('should transpile export {name}', function() {
-    var file1 = compileAndWrite('export var a = 1');
-    var file2 = compileAndWrite('export {a} from "' + file1 + '"');
-    expect(require(file2).a).toBe(1);
-  });
-
-});
-
-
-function merge(a, b) {
-  var result = {};
-  for (var prop in a) {
-    result[prop] = a[prop];
-  }
-  for (var prop in b) {
-    result[prop] = b[prop];
-  }
-  return result;
-}