diff --git a/Specs/Scene/RectangularPyramidSensorVolumeSpec.js b/Specs/Scene/RectangularPyramidSensorVolumeSpec.js
index ecb7bb6a83d..9e36bed9a55 100644
--- a/Specs/Scene/RectangularPyramidSensorVolumeSpec.js
+++ b/Specs/Scene/RectangularPyramidSensorVolumeSpec.js
@@ -169,14 +169,14 @@ defineSuite([
         camera.position = new Cartesian3(x, y, z);
 
         scene.render();
-        expect(scene.context.readPixels()).toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).toEqual([0, 0, 0, 255]);
         var sensor = addSensor({
             latitude : -90.0,
             altitude : 2500000.0
         });
         sensor.portionToDisplay = SensorVolumePortionToDisplay.COMPLETE;
         scene.render();
-        expect(scene.context.readPixels()).not.toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).not.toEqual([0, 0, 0, 255]);
     });
 
     it('renders using below ellipsoid horizon option', function() {
@@ -189,14 +189,14 @@ defineSuite([
         camera.position = new Cartesian3(x, y, z);
 
         scene.render();
-        expect(scene.context.readPixels()).toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).toEqual([0, 0, 0, 255]);
         var sensor = addSensor({
             latitude : -90.0,
             altitude : 2500000.0
         });
         sensor.portionToDisplay = SensorVolumePortionToDisplay.BELOW_ELLIPSOID_HORIZON;
         scene.render();
-        expect(scene.context.readPixels()).not.toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).not.toEqual([0, 0, 0, 255]);
     });
 
     it('renders using above ellipsoid horizon option', function() {
@@ -209,25 +209,25 @@ defineSuite([
         camera.position = new Cartesian3(x, y, z);
 
         scene.render();
-        expect(scene.context.readPixels()).toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).toEqual([0, 0, 0, 255]);
         var sensor = addSensor({
             latitude : -90.0,
             altitude : 2500000.0
         });
         sensor.portionToDisplay = SensorVolumePortionToDisplay.ABOVE_ELLIPSOID_HORIZON;
         scene.render();
-        expect(scene.context.readPixels()).not.toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).not.toEqual([0, 0, 0, 255]);
     });
 
     it('renders', function() {
         scene.render();
-        expect(scene.context.readPixels()).toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).toEqual([0, 0, 0, 255]);
         var sensor = addSensor({
             latitude : -90.0,
             altitude : 3000000.0
         });
         scene.render();
-        expect(scene.context.readPixels()).not.toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).not.toEqual([0, 0, 0, 255]);
     });
 
     it('does not render when show is false', function() {
@@ -237,10 +237,10 @@ defineSuite([
         });
         sensor.show = true;
         scene.render();
-        expect(scene.context.readPixels()).not.toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).not.toEqual([0, 0, 0, 255]);
         sensor.show = false;
         scene.render();
-        expect(scene.context.readPixels()).toEqual([0, 0, 0, 255]);
+        expect(scene._context.readPixels()).toEqual([0, 0, 0, 255]);
     });
 
     it('is picked', function() {