diff --git a/lib/htmlparser/htmlparser.js b/lib/htmlparser/htmlparser.js
index 46a3da08313e..ab7241e48c30 100644
--- a/lib/htmlparser/htmlparser.js
+++ b/lib/htmlparser/htmlparser.js
@@ -118,7 +118,7 @@
       }
 
       if ( html == last )
-        throw "Parse Error: " + html;
+        throw new Error("Parse Error: ") + html;
       last = html;
     }
 
diff --git a/src/ngMock/angular-mocks.js b/src/ngMock/angular-mocks.js
index 090cac87f433..8e5a766415ce 100644
--- a/src/ngMock/angular-mocks.js
+++ b/src/ngMock/angular-mocks.js
@@ -193,7 +193,7 @@ angular.mock.$Browser.prototype = {
  *
  *       inject(function($log, $exceptionHandler, $timeout) {
  *         $timeout(function() { $log.log(1); });
- *         $timeout(function() { $log.log(2); throw 'banana peel'; });
+ *         $timeout(function() { $log.log(2); throw new Error('banana peel'); });
  *         $timeout(function() { $log.log(3); });
  *         expect($exceptionHandler.errors).toEqual([]);
  *         expect($log.assertEmpty());
diff --git a/src/ngScenario/Application.js b/src/ngScenario/Application.js
index 86e53ad7fca9..b83feaa06cae 100644
--- a/src/ngScenario/Application.js
+++ b/src/ngScenario/Application.js
@@ -35,7 +35,7 @@ angular.scenario.Application.prototype.getFrame_ = function() {
 angular.scenario.Application.prototype.getWindow_ = function() {
   var contentWindow = this.getFrame_().prop('contentWindow');
   if (!contentWindow) {
-    throw 'Frame window is not accessible.';
+    throw new Error('Frame window is not accessible.');
   }
   return contentWindow;
 };
@@ -113,7 +113,7 @@ angular.scenario.Application.prototype.executeAction = function(action) {
   var self = this;
   var $window = this.getWindow_();
   if (!$window.document) {
-    throw 'Sandbox Error: Application document not accessible.';
+    throw new Error('Sandbox Error: Application document not accessible.');
   }
   if (!$window.angular) {
     return action.call(this, $window, _jQuery($window.document));
diff --git a/src/ngScenario/ObjectModel.js b/src/ngScenario/ObjectModel.js
index 84466f0952c8..b6fa82534d93 100644
--- a/src/ngScenario/ObjectModel.js
+++ b/src/ngScenario/ObjectModel.js
@@ -77,7 +77,7 @@ angular.scenario.ObjectModel = function(runner) {
     var it = self.getSpec(spec.id);
     var step = it.getLastStep();
     if (step.name !== step.name) {
-      throw 'Events fired in the wrong order. Step names don\'t match.';
+      throw new Error('Events fired in the wrong order. Step names don\'t match.');
     }
     complete(step);
 
diff --git a/test/auto/injectorSpec.js b/test/auto/injectorSpec.js
index cff2ec5b0e7b..62658501652f 100644
--- a/test/auto/injectorSpec.js
+++ b/test/auto/injectorSpec.js
@@ -667,7 +667,7 @@ describe('injector', function() {
       it('should handle exceptions', function() {
         expect(function() {
           createInjector([function() {
-            throw 'MyError';
+            throw new Error('MyError');
           }], {});
         }).toThrowMinErr('$injector', 'modulerr', /Failed to instantiate module .+ due to:\n.*MyError/);
       });
@@ -891,7 +891,7 @@ describe('injector', function() {
 
     it('should handle constructor exception', function() {
       expect(function() {
-        $injector.instantiate(function() { throw 'MyError'; });
+        $injector.instantiate(function() { throw new Error('MyError'); });
       }).toThrow('MyError');
     });
 
diff --git a/test/ng/compileSpec.js b/test/ng/compileSpec.js
index 253ae6e50028..73882595730d 100755
--- a/test/ng/compileSpec.js
+++ b/test/ng/compileSpec.js
@@ -528,11 +528,11 @@ describe('$compile', function() {
       it('should handle exceptions', function() {
         module(function($exceptionHandlerProvider) {
           $exceptionHandlerProvider.mode('log');
-          directive('factoryError', function() { throw 'FactoryError'; });
+          directive('factoryError', function() { throw new Error('FactoryError'); });
           directive('templateError',
-              valueFn({ compile: function() { throw 'TemplateError'; } }));
+              valueFn({ compile: function() { throw new Error('TemplateError'); } }));
           directive('linkingError',
-              valueFn(function() { throw 'LinkingError'; }));
+              valueFn(function() { throw new Error('LinkingError'); }));
         });
         inject(function($rootScope, $compile, $exceptionHandler) {
           element = $compile('<div factory-error template-error linking-error></div>')($rootScope);
diff --git a/test/ng/directive/inputSpec.js b/test/ng/directive/inputSpec.js
index 3c92625a1b43..f269dad4c7eb 100644
--- a/test/ng/directive/inputSpec.js
+++ b/test/ng/directive/inputSpec.js
@@ -479,7 +479,7 @@ describe('input', function() {
   it('should report error on assignment error', function() {
     expect(function() {
       var inputElm = helper.compileInput('<input type="text" ng-model="throw \'\'">');
-    }).toThrowMinErr("$parse", "syntax", "Syntax Error: Token '''' is an unexpected token at column 7 of the expression [throw ''] starting at [''].");
+    }).toThrowMinErr("$parse", "syntax", "Syntax Error: Token '''' is an unexpected token at column 7 of the expression [throw new Error(''] starting at ['']."));
   });
 
 
diff --git a/test/ng/httpSpec.js b/test/ng/httpSpec.js
index ab4a9f43e878..b4ad036feaf8 100644
--- a/test/ng/httpSpec.js
+++ b/test/ng/httpSpec.js
@@ -30,7 +30,7 @@ describe('$http', function() {
     });
 
     if ($exceptionHandler.errors.length) {
-      throw 'Unhandled exceptions trapped in $exceptionHandler!';
+      throw new Error('Unhandled exceptions trapped in $exceptionHandler!');
     }
 
     $rootScope.$digest();
diff --git a/test/ng/intervalSpec.js b/test/ng/intervalSpec.js
index 2bc2de321a18..37eb4051755d 100644
--- a/test/ng/intervalSpec.js
+++ b/test/ng/intervalSpec.js
@@ -214,7 +214,7 @@ describe('$interval', function() {
 
     it('should delegate exception to the $exceptionHandler service', inject(
         function($interval, $exceptionHandler, $window) {
-      $interval(function() { throw "Test Error"; }, 1000);
+      $interval(function() { throw new Error("Test Error"); }, 1000);
       expect($exceptionHandler.errors).toEqual([]);
 
       $window.flush(1000);
@@ -229,7 +229,7 @@ describe('$interval', function() {
         function($interval, $rootScope, $window) {
       var applySpy = spyOn($rootScope, '$apply').andCallThrough();
 
-      $interval(function() { throw "Test Error"; }, 1000);
+      $interval(function() { throw new Error("Test Error"); }, 1000);
       expect(applySpy).not.toHaveBeenCalled();
 
       $window.flush(1000);
@@ -240,7 +240,7 @@ describe('$interval', function() {
     it('should still update the interval promise when an exception is thrown',
         inject(function($interval, $window) {
       var log = [],
-          promise = $interval(function() { throw "Some Error"; }, 1000);
+          promise = $interval(function() { throw new Error("Some Error"); }, 1000);
 
       promise.then(function(value) { log.push('promise success: ' + value); },
                  function(err) { log.push('promise error: ' + err); },
diff --git a/test/ng/parseSpec.js b/test/ng/parseSpec.js
index 321cff48f93a..aa870b8939d6 100644
--- a/test/ng/parseSpec.js
+++ b/test/ng/parseSpec.js
@@ -2183,7 +2183,7 @@ describe('parser', function() {
 
       it('should short-circuit AND operator', function() {
         scope.run = function() {
-          throw "IT SHOULD NOT HAVE RUN";
+          throw new Error("IT SHOULD NOT HAVE RUN");
         };
         expect(scope.$eval('false && run()')).toBe(false);
         expect(scope.$eval('false && true && run()')).toBe(false);
@@ -2191,7 +2191,7 @@ describe('parser', function() {
 
       it('should short-circuit OR operator', function() {
         scope.run = function() {
-          throw "IT SHOULD NOT HAVE RUN";
+          throw new Error("IT SHOULD NOT HAVE RUN");
         };
         expect(scope.$eval('true || run()')).toBe(true);
         expect(scope.$eval('true || false || run()')).toBe(true);
diff --git a/test/ng/qSpec.js b/test/ng/qSpec.js
index dbafc18fcfca..712e6e37ec4c 100644
--- a/test/ng/qSpec.js
+++ b/test/ng/qSpec.js
@@ -2099,7 +2099,7 @@ describe('q', function() {
 
 
     it('should still reject the promise, when exception is thrown in success handler, even if exceptionHandler rethrows', function() {
-      deferred.promise.then(function() { throw 'reject'; }).then(null, errorSpy);
+      deferred.promise.then(function() { throw new Error('reject'); }).then(null, errorSpy);
       deferred.resolve('resolve');
       mockNextTick.flush();
       expect(exceptionExceptionSpy).toHaveBeenCalled();
@@ -2108,7 +2108,7 @@ describe('q', function() {
 
 
     it('should still reject the promise, when exception is thrown in error handler, even if exceptionHandler rethrows', function() {
-      deferred.promise.then(null, function() { throw 'reject again'; }).then(null, errorSpy);
+      deferred.promise.then(null, function() { throw new Error('reject again'); }).then(null, errorSpy);
       deferred.reject('reject');
       mockNextTick.flush();
       expect(exceptionExceptionSpy).toHaveBeenCalled();
diff --git a/test/ng/rootScopeSpec.js b/test/ng/rootScopeSpec.js
index 3e405b2006b5..df5769b779fc 100644
--- a/test/ng/rootScopeSpec.js
+++ b/test/ng/rootScopeSpec.js
@@ -1589,7 +1589,7 @@ describe('Scope', function() {
 
     it('should pass thrown exceptions to $exceptionHandler', inject(function($rootScope, $browser, $exceptionHandler) {
       $rootScope.$applyAsync(function() {
-        throw 'OOPS';
+        throw new Error('OOPS');
       });
 
       $browser.defer.flush();
@@ -1601,7 +1601,7 @@ describe('Scope', function() {
 
     it('should evaluate subsequent expressions after an exception is thrown', inject(function($rootScope, $browser) {
       $rootScope.$applyAsync(function() {
-        throw 'OOPS';
+        throw new Error('OOPS');
       });
       $rootScope.$applyAsync('x = "All good!"');
 
@@ -1799,7 +1799,7 @@ describe('Scope', function() {
 
       it('should dispatch exceptions to the $exceptionHandler',
           inject(function($exceptionHandler) {
-        child.$on('myEvent', function() { throw 'bubbleException'; });
+        child.$on('myEvent', function() { throw new Error('bubbleException'); });
         grandChild.$emit('myEvent');
         expect(log).toEqual('2>1>0>');
         expect($exceptionHandler.errors).toEqual(['bubbleException']);
diff --git a/test/ng/timeoutSpec.js b/test/ng/timeoutSpec.js
index 2aed8b743a5f..39f2e58e47e7 100644
--- a/test/ng/timeoutSpec.js
+++ b/test/ng/timeoutSpec.js
@@ -161,7 +161,7 @@ describe('$timeout', function() {
 
     it('should delegate exception to the $exceptionHandler service', inject(
         function($timeout, $exceptionHandler) {
-      $timeout(function() { throw "Test Error"; });
+      $timeout(function() { throw new Error("Test Error"); });
       expect($exceptionHandler.errors).toEqual([]);
 
       $timeout.flush();
@@ -173,7 +173,7 @@ describe('$timeout', function() {
         function($timeout, $rootScope) {
       var applySpy = spyOn($rootScope, '$apply').andCallThrough();
 
-      $timeout(function() { throw "Test Error"; });
+      $timeout(function() { throw new Error("Test Error"); });
       expect(applySpy).not.toHaveBeenCalled();
 
       $timeout.flush();
@@ -183,7 +183,7 @@ describe('$timeout', function() {
 
     it('should reject the timeout promise when an exception is thrown in the timeout callback',
         inject(function($timeout, log) {
-      var promise = $timeout(function() { throw "Some Error"; });
+      var promise = $timeout(function() { throw new Error("Some Error"); });
 
       promise.then(log.fn('success'), function(reason) { log('error: ' + reason); });
       $timeout.flush();
@@ -216,7 +216,7 @@ describe('$timeout', function() {
       // $browser.defer.cancel is only called on cancel if the deferred object is still referenced
       var cancelSpy = spyOn($browser.defer, 'cancel').andCallThrough();
 
-      var promise = $timeout(function() { throw "Test Error"; }, 0, false);
+      var promise = $timeout(function() { throw new Error("Test Error"); }, 0, false);
       $timeout.flush();
 
       expect(cancelSpy).not.toHaveBeenCalled();
diff --git a/test/ngCookies/cookieWriterSpec.js b/test/ngCookies/cookieWriterSpec.js
index e94f2b16e7c7..57bd5d893e16 100644
--- a/test/ngCookies/cookieWriterSpec.js
+++ b/test/ngCookies/cookieWriterSpec.js
@@ -141,7 +141,7 @@ describe('cookie options', function() {
                   if (prev === undefined) {
                     return pair[1] === undefined ? true : pair[1];
                   } else {
-                    throw 'duplicate key in cookie string';
+                    throw new Error('duplicate key in cookie string');
                   }
                 } else {
                   return prev;
diff --git a/test/ngMock/angular-mocksSpec.js b/test/ngMock/angular-mocksSpec.js
index f9c7587e86cc..16fed1c5815b 100644
--- a/test/ngMock/angular-mocksSpec.js
+++ b/test/ngMock/angular-mocksSpec.js
@@ -424,7 +424,7 @@ describe('ngMock', function() {
 
       it('should delegate exception to the $exceptionHandler service', inject(
           function($interval, $exceptionHandler) {
-        $interval(function() { throw "Test Error"; }, 1000);
+        $interval(function() { throw new Error("Test Error"); }, 1000);
         expect($exceptionHandler.errors).toEqual([]);
 
         $interval.flush(1000);
@@ -439,7 +439,7 @@ describe('ngMock', function() {
           function($interval, $rootScope) {
         var applySpy = spyOn($rootScope, '$apply').andCallThrough();
 
-        $interval(function() { throw "Test Error"; }, 1000);
+        $interval(function() { throw new Error("Test Error"); }, 1000);
         expect(applySpy).not.toHaveBeenCalled();
 
         $interval.flush(1000);
@@ -450,7 +450,7 @@ describe('ngMock', function() {
       it('should still update the interval promise when an exception is thrown',
           inject(function($interval) {
         var log = [],
-            promise = $interval(function() { throw "Some Error"; }, 1000);
+            promise = $interval(function() { throw new Error("Some Error"); }, 1000);
 
         promise.then(function(value) { log.push('promise success: ' + value); },
                    function(err) { log.push('promise error: ' + err); },
@@ -921,7 +921,7 @@ describe('ngMock', function() {
       it('should not change thrown strings', inject(function($sniffer) {
         expect(function() {
           inject(function() {
-            throw 'test message';
+            throw new Error('test message');
           });
         }).toThrow('test message');
       }));
diff --git a/test/ngScenario/SpecRunnerSpec.js b/test/ngScenario/SpecRunnerSpec.js
index 6a207450b5f7..2e102ae2ea98 100644
--- a/test/ngScenario/SpecRunnerSpec.js
+++ b/test/ngScenario/SpecRunnerSpec.js
@@ -94,7 +94,7 @@ describe('angular.scenario.SpecRunner', function() {
   it('should execute notify UI on spec setup error', function() {
     var finished;
     var spec = createSpec('test spec', function() {
-      throw 'message';
+      throw new Error('message');
     });
     runner.run(spec, function() {
       finished = true;
@@ -130,7 +130,7 @@ describe('angular.scenario.SpecRunner', function() {
     var finished;
     var spec = createSpec('test spec', function() {
       this.addFuture('test future', function(done) {
-        throw 'error message';
+        throw new Error('error message');
       });
     });
     runner.run(spec, function() {
@@ -150,7 +150,7 @@ describe('angular.scenario.SpecRunner', function() {
     var finished, after;
     var spec = createSpec('test spec', function() {
       this.addFuture('body', function(done) {
-        throw 'error message';
+        throw new Error('error message');
       });
     });
     spec.after = function() {