diff --git a/.jshintrc b/.jshintrc
index 5bbc9db..a80a135 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -16,5 +16,13 @@
     "loopfunc": true,
     "bitwise": false,
 
-    "browser": true
+    "browser": true,
+
+    "globals": {
+        "describe": false,
+        "beforeEach": false,
+        "it": false,
+        "expect": false 
+    }
+
 }
diff --git a/package.json b/package.json
index 852c865..e437c44 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "grunt-contrib-concat": "~0.5.0",
     "grunt-contrib-cssmin": "^0.10.0",
     "grunt-contrib-jasmine": "~0.8.0",
-    "grunt-contrib-jshint": "~0.7.1",
+    "grunt-contrib-jshint": "~0.10.0",
     "grunt-contrib-uglify": "~0.4.0",
     "grunt-contrib-watch": "^0.6.1",
     "load-grunt-tasks": "~0.2.0"
diff --git a/spec/api.data-spec.js b/spec/api.data-spec.js
index 2e7bd25..ba26e6a 100644
--- a/spec/api.data-spec.js
+++ b/spec/api.data-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 api data', function () {
     'use strict';
diff --git a/spec/api.focus-spec.js b/spec/api.focus-spec.js
index effa228..3f586f8 100644
--- a/spec/api.focus-spec.js
+++ b/spec/api.focus-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 api load', function () {
     'use strict';
diff --git a/spec/api.grid-spec.js b/spec/api.grid-spec.js
index 605cf4d..70938e1 100644
--- a/spec/api.grid-spec.js
+++ b/spec/api.grid-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 api grid', function () {
     'use strict';
diff --git a/spec/api.load-spec.js b/spec/api.load-spec.js
index 20193b7..251c3a6 100644
--- a/spec/api.load-spec.js
+++ b/spec/api.load-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 api load', function () {
     'use strict';
diff --git a/spec/api.zoom-spec.js b/spec/api.zoom-spec.js
index bab4814..a315acc 100644
--- a/spec/api.zoom-spec.js
+++ b/spec/api.zoom-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 api zoom', function () {
     'use strict';
diff --git a/spec/arc-spec.js b/spec/arc-spec.js
index 3a74ee9..74133e8 100644
--- a/spec/arc-spec.js
+++ b/spec/arc-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart axis', function () {
     'use strict';
diff --git a/spec/axis-spec.js b/spec/axis-spec.js
index df5d03f..f28fe69 100644
--- a/spec/axis-spec.js
+++ b/spec/axis-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart axis', function () {
     'use strict';
diff --git a/spec/c3-spec.js b/spec/c3-spec.js
index c2455b0..2567c7e 100644
--- a/spec/c3-spec.js
+++ b/spec/c3-spec.js
@@ -1,6 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it;
 
 describe('c3', function () {
     'use strict';
diff --git a/spec/class-spec.js b/spec/class-spec.js
index 86b54e1..d53e17b 100644
--- a/spec/class-spec.js
+++ b/spec/class-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart class', function () {
     'use strict';
diff --git a/spec/core-spec.js b/spec/core-spec.js
index 662a1a7..88d759b 100644
--- a/spec/core-spec.js
+++ b/spec/core-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart', function () {
     'use strict';
diff --git a/spec/data-spec.js b/spec/data-spec.js
index 1a03a87..0ee28ba 100644
--- a/spec/data-spec.js
+++ b/spec/data-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart data', function () {
     'use strict';
diff --git a/spec/domain-spec.js b/spec/domain-spec.js
index 3c4e7c0..56ebd78 100644
--- a/spec/domain-spec.js
+++ b/spec/domain-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart domain', function () {
     'use strict';
diff --git a/spec/grid-spec.js b/spec/grid-spec.js
index 92163e0..046b1e1 100644
--- a/spec/grid-spec.js
+++ b/spec/grid-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart grid', function () {
     'use strict';
diff --git a/spec/interaction-spec.js b/spec/interaction-spec.js
index 68d2726..a5c07f1 100644
--- a/spec/interaction-spec.js
+++ b/spec/interaction-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart interaction', function () {
     'use strict';
diff --git a/spec/legend-spec.js b/spec/legend-spec.js
index 8a1ed92..6272e42 100644
--- a/spec/legend-spec.js
+++ b/spec/legend-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart legend', function () {
     'use strict';
diff --git a/spec/shape.bar-spec.js b/spec/shape.bar-spec.js
index 7babc1e..9f15328 100644
--- a/spec/shape.bar-spec.js
+++ b/spec/shape.bar-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 var setMouseEvent = window.setMouseEvent;
 
diff --git a/spec/shape.line-spec.js b/spec/shape.line-spec.js
index 40c1fa7..65f6282 100644
--- a/spec/shape.line-spec.js
+++ b/spec/shape.line-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart shape line', function () {
     'use strict';
diff --git a/spec/tooltip-spec.js b/spec/tooltip-spec.js
index ab88ab4..838496e 100644
--- a/spec/tooltip-spec.js
+++ b/spec/tooltip-spec.js
@@ -1,9 +1,5 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    jasmine = window.jasmine,
-    beforeAll = window.beforeAll,
-    beforeEach = window.beforeEach;
+var jasmine = window.jasmine,
+    beforeAll = window.beforeAll;
 
 describe('c3 chart tooltip', function () {
     'use strict';
diff --git a/spec/type-spec.js b/spec/type-spec.js
index 2661b17..c49a916 100644
--- a/spec/type-spec.js
+++ b/spec/type-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart types', function () {
     'use strict';
diff --git a/spec/zoom-spec.js b/spec/zoom-spec.js
index 060769c..121add3 100644
--- a/spec/zoom-spec.js
+++ b/spec/zoom-spec.js
@@ -1,7 +1,3 @@
-var describe = window.describe,
-    expect = window.expect,
-    it = window.it,
-    beforeEach = window.beforeEach;
 
 describe('c3 chart zoom', function () {
     'use strict';