diff --git a/.travis.yml b/.travis.yml
index ba9461d5..955e18f1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ node_js:
   - "0.12"
   - "0.11"
   - "0.10"
-script: 'npm run build && npm run test && npm run lint && npm run lint_tests'
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq libgif-dev libpng-dev libjpeg8-dev libpango1.0-dev libcairo2-dev
+script: 'npm run build && npm run test && npm run lint && npm run lint_tests'
diff --git a/package.json b/package.json
index ae49b5ae..aceab54a 100644
--- a/package.json
+++ b/package.json
@@ -47,8 +47,8 @@
     "uglify-js": "2.4.x",
     "jscs": "2.1.x",
     "jshint": "2.8.x",
-    "qunit": "0.7.2",
-    "istanbul": "0.3.x"
+    "qunit": "0.7.x",
+    "istanbul": "0.4.x"
   },
   "engines": {
     "node": ">=0.4.0"
diff --git a/src/static_canvas.class.js b/src/static_canvas.class.js
index 93deba40..7eaa8797 100644
--- a/src/static_canvas.class.js
+++ b/src/static_canvas.class.js
@@ -887,7 +887,6 @@
       }
 
       this.fire('after:render');
-      canvasToDrawOn.restore();
       return this;
     },
 
diff --git a/test.js b/test.js
index 0b081ec5..e4f04d10 100644
--- a/test.js
+++ b/test.js
@@ -5,6 +5,7 @@ testrunner.options.log.tests = false;
 testrunner.options.log.assertions = false;
 
 testrunner.options.coverage = true;
+testrunner.options.maxBlockDuration = 120000;
 
 testrunner.run({
     deps: "./test/fixtures/test_script.js",
diff --git a/test/unit/group.js b/test/unit/group.js
index 5c10cab0..de5a5353 100644
--- a/test/unit/group.js
+++ b/test/unit/group.js
@@ -3,7 +3,7 @@
   var el = fabric.document.createElement('canvas');
   el.width = 600; el.height = 600;
 
-  var canvas = this.canvas = fabric.isLikelyNode ? fabric.createCanvasForNode() : new fabric.Canvas(el);
+  var canvas = this.canvas = fabric.isLikelyNode ? fabric.createCanvasForNode(600, 600, {enableRetinaScaling: false}) : new fabric.Canvas(el);
 
   // function _createImageElement() {
   //   return fabric.isLikelyNode ? new (require('canvas').Image)() : fabric.document.createElement('img');
@@ -515,19 +515,25 @@ test('toObject without default values', function() {
   });
 
   test('test group transformMatrix', function() {
-    var rect1 = new fabric.Rect({ top: 5, left: 5, width: 5, height: 5, strokeWidth: 0, fill: 'black', opacity: 1}),
-        rect2 = new fabric.Rect({ top: 15, left: 15, width: 5, height: 5, strokeWidth: 0, fill: 'black', opacity: 1}),
-        group = new fabric.Group([ rect1, rect2 ]),
-        ctx = canvas.contextContainer, isTransparent = fabric.util.isTransparent;
+    var rect1 = new fabric.Rect({ top: 1, left: 1, width: 2, height: 2, strokeWidth: 0, fill: 'red', opacity: 1}),
+        rect2 = new fabric.Rect({ top: 4, left: 4, width: 2, height: 2, strokeWidth: 0, fill: 'red', opacity: 1}),
+        group = new fabric.Group([ rect1, rect2 ], {opacity: 1, fill: 'blue', strokeWidth: 0}),
+        isTransparent = fabric.util.isTransparent,
+        ctx = canvas.contextContainer;
     canvas.add(group);
+    equal(canvas.enableRetinaScaling, false);
+    equal(isTransparent(ctx, 0, 0, 0), true);
+    equal(isTransparent(ctx, 1, 1, 0), false);
+    equal(isTransparent(ctx, 2, 2, 0), false);
     equal(isTransparent(ctx, 3, 3, 0), true);
-    equal(isTransparent(ctx, 8, 8, 0), false);
-    var imageData = ctx.getImageData(0, 0, (tolerance * 2) || 1, (tolerance * 2) || 1);
-    equal(imageData, [0]);
-    group.transformMatrix = [1.2, 0, 0, 1.2, 1, 1];
+    equal(isTransparent(ctx, 4, 4, 0), false);
+    group.transformMatrix = [2, 0, 0, 2, 1, 1];
     canvas.renderAll();
-    equal(isTransparent(ctx, 101, 101, 0), true);
-    equal(isTransparent(ctx, 131, 131, 0), false);
+    equal(isTransparent(ctx, 0, 0, 0), true);
+    equal(isTransparent(ctx, 1, 1, 0), true);
+    equal(isTransparent(ctx, 2, 2, 0), true);    
+    equal(isTransparent(ctx, 3, 3, 0), false);
+    equal(isTransparent(ctx, 4, 4, 0), false);
   });
   // asyncTest('cloning group with image', function() {
   //   var rect = new fabric.Rect({ top: 100, left: 100, width: 30, height: 10 }),
diff --git a/test/unit/shadow.js b/test/unit/shadow.js
index cd91d76c..4f7d4813 100644
--- a/test/unit/shadow.js
+++ b/test/unit/shadow.js
@@ -141,7 +141,7 @@
     var object = shadow.toObject(),
         shadow2 = new fabric.Shadow(object),
         object2 = shadow2.toObject();
-    equal(shadow.affectStroke, shadow2.affectStroke)
+    equal(shadow.affectStroke, shadow2.affectStroke);
     deepEqual(object, object2);
   });
 
diff --git a/test/unit/text.js b/test/unit/text.js
index b21746db..d161b00c 100644
--- a/test/unit/text.js
+++ b/test/unit/text.js
@@ -271,7 +271,7 @@
 
     // temp workaround for text objects not obtaining width under node
     text.width = 100;
-    text.textAlign = 'justify'
+    text.textAlign = 'justify';
     equal(removeTranslate(text.toSVG()), removeTranslate(TEXT_SVG_JUSTIFIED));
   });