diff --git a/spec/observables/zip-spec.js b/spec/observables/zip-spec.js
index 4a3508b24e..fd68a4da27 100644
--- a/spec/observables/zip-spec.js
+++ b/spec/observables/zip-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, expectObservable, hot, cold */
+/* globals describe, it, expect, Symbol, expectObservable, hot */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/buffer-spec.js b/spec/operators/buffer-spec.js
index 521db6b43a..742a545550 100644
--- a/spec/operators/buffer-spec.js
+++ b/spec/operators/buffer-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, expectObservable, expectSubscriptions, hot */
+/* globals describe, it, expect, hot, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/bufferCount-spec.js b/spec/operators/bufferCount-spec.js
index e6b336996c..a31d7875bc 100644
--- a/spec/operators/bufferCount-spec.js
+++ b/spec/operators/bufferCount-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, expectObservable, hot */
+/* globals describe, it, expect, hot, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/bufferTime-spec.js b/spec/operators/bufferTime-spec.js
index c86d39e602..8a124357ac 100644
--- a/spec/operators/bufferTime-spec.js
+++ b/spec/operators/bufferTime-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, hot, cold, rxTestScheduler, expectObservable */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions, rxTestScheduler */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/bufferToggle-spec.js b/spec/operators/bufferToggle-spec.js
index d0e2b6e2f6..9817ae9fec 100644
--- a/spec/operators/bufferToggle-spec.js
+++ b/spec/operators/bufferToggle-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/bufferWhen-spec.js b/spec/operators/bufferWhen-spec.js
index e2e92bf860..0dc5dd22b7 100644
--- a/spec/operators/bufferWhen-spec.js
+++ b/spec/operators/bufferWhen-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, hot, cold, expectObservable */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/finally-spec.js b/spec/operators/finally-spec.js
index 7697a151e4..8ddfdaeac6 100644
--- a/spec/operators/finally-spec.js
+++ b/spec/operators/finally-spec.js
@@ -6,7 +6,7 @@ describe('Observable.prototype.finally()', function () {
   it('should call finally after complete', function (done) {
     var completed = false;
     Observable.of(1, 2, 3)
-      .finally(function (x) {
+      .finally(function () {
         expect(completed).toBe(true);
         done();
       })
@@ -24,7 +24,7 @@ describe('Observable.prototype.finally()', function () {
         }
         return x;
       })
-      .finally(function (x) {
+      .finally(function () {
         expect(thrown).toBe(true);
         done();
       })
@@ -37,7 +37,7 @@ describe('Observable.prototype.finally()', function () {
     var disposed = false;
     var subscription = Observable
       .timer(100)
-      .finally(function (x) {
+      .finally(function () {
         expect(disposed).toBe(true);
         done();
       }).subscribe();
diff --git a/spec/operators/groupBy-spec.js b/spec/operators/groupBy-spec.js
index b12af2243b..0e11a74df6 100644
--- a/spec/operators/groupBy-spec.js
+++ b/spec/operators/groupBy-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable */
 var Rx = require('../../dist/cjs/Rx.KitchenSink');
 var Observable = Rx.Observable;
 var GroupedObservable = require('../../dist/cjs/operators/groupBy-support').GroupedObservable;
diff --git a/spec/operators/map-spec.js b/spec/operators/map-spec.js
index 6db07dd9bb..920b8124e3 100644
--- a/spec/operators/map-spec.js
+++ b/spec/operators/map-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/map-to-spec.js b/spec/operators/map-to-spec.js
index 59c1a4d7d7..3f1fefab73 100644
--- a/spec/operators/map-to-spec.js
+++ b/spec/operators/map-to-spec.js
@@ -1,7 +1,10 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
+// function shortcuts
+var throwError = function () { throw new Error(); };
+
 describe('Observable.prototype.mapTo()', function () {
   it('should map one value', function () {
     var a =   cold('--7--|');
diff --git a/spec/operators/merge-map-spec.js b/spec/operators/merge-map-spec.js
index 7e95c07493..3a4b4438a9 100644
--- a/spec/operators/merge-map-spec.js
+++ b/spec/operators/merge-map-spec.js
@@ -1,4 +1,4 @@
-/* globals expectObservable, cold, hot, describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 var Promise = require('promise');
diff --git a/spec/operators/retry-spec.js b/spec/operators/retry-spec.js
index 8bb064013f..e091ee69f2 100644
--- a/spec/operators/retry-spec.js
+++ b/spec/operators/retry-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/retryWhen-spec.js b/spec/operators/retryWhen-spec.js
index 799082da5f..c3bc5e57a1 100644
--- a/spec/operators/retryWhen-spec.js
+++ b/spec/operators/retryWhen-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/switch-spec.js b/spec/operators/switch-spec.js
index 6616d6b6a8..a34208f18d 100644
--- a/spec/operators/switch-spec.js
+++ b/spec/operators/switch-spec.js
@@ -1,4 +1,4 @@
-/* expect, it, describe, expectObserable, hot, cold */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Promise = require('promise');
 
diff --git a/spec/operators/switchMap-spec.js b/spec/operators/switchMap-spec.js
index 8820902434..f48834e24a 100644
--- a/spec/operators/switchMap-spec.js
+++ b/spec/operators/switchMap-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 var immediateScheduler = Rx.Scheduler.immediate;
diff --git a/spec/operators/window-spec.js b/spec/operators/window-spec.js
index 3e2b825906..b1033f0fc3 100644
--- a/spec/operators/window-spec.js
+++ b/spec/operators/window-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, expectObservable, hot, rxTestScheduler */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions, rxTestScheduler */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/windowCount-spec.js b/spec/operators/windowCount-spec.js
index cc556365b8..6a5c2996e6 100644
--- a/spec/operators/windowCount-spec.js
+++ b/spec/operators/windowCount-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, expectObservable, hot */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/windowTime-spec.js b/spec/operators/windowTime-spec.js
index a8ae3ea01b..7f3c1ed17a 100644
--- a/spec/operators/windowTime-spec.js
+++ b/spec/operators/windowTime-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect, hot, expectObservable, rxTestScheduler */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions, rxTestScheduler */
 var Rx = require('../../dist/cjs/Rx.KitchenSink');
 var Observable = Rx.Observable;
 
diff --git a/spec/operators/windowToggle-spec.js b/spec/operators/windowToggle-spec.js
index 2e118931e8..f4298a91fa 100644
--- a/spec/operators/windowToggle-spec.js
+++ b/spec/operators/windowToggle-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, hot, cold, expectObservable, expectSubscriptions */
 var Rx = require('../../dist/cjs/Rx.KitchenSink');
 var Observable = Rx.Observable;
 
diff --git a/spec/schedulers/TestScheduler-spec.js b/spec/schedulers/TestScheduler-spec.js
index ea5cea34d4..890be10dce 100644
--- a/spec/schedulers/TestScheduler-spec.js
+++ b/spec/schedulers/TestScheduler-spec.js
@@ -1,4 +1,4 @@
-/* globals describe, it, expect */
+/* globals describe, it, expect, expectObservable */
 var Rx = require('../../dist/cjs/Rx.KitchenSink');
 var TestScheduler = Rx.TestScheduler;
 var Notification = Rx.Notification;