diff --git a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
index c0c6b14..91df41f 100644
--- a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
+++ b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
@@ -92,9 +92,14 @@
 
             if (instanceExt)
             {
-                gl.vertexAttribDivisor = instanceExt.vertexAttribDivisorANGLE;
-                gl.drawElementsInstanced = instanceExt.drawElementsInstancedANGLE;
-                gl.drawArraysInstanced = instanceExt.drawArraysInstancedANGLE;
+                gl.vertexAttribDivisor = (a, b) =>
+                    instanceExt.vertexAttribDivisorANGLE(a, b);
+
+                gl.drawElementsInstanced = (a, b, c, d, e) =>
+                    instanceExt.drawElementsInstancedANGLE(a, b, c, d, e);
+
+                gl.drawArraysInstanced = (a, b, c, d) =>
+                    instanceExt.drawArraysInstancedANGLE(a, b, c, d);
             }
         }
     }

diff --git a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
index c0c6b14..91df41f 100644
--- a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
+++ b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
@@ -92,9 +92,14 @@
 
             if (instanceExt)
             {
-                gl.vertexAttribDivisor = instanceExt.vertexAttribDivisorANGLE;
-                gl.drawElementsInstanced = instanceExt.drawElementsInstancedANGLE;
-                gl.drawArraysInstanced = instanceExt.drawArraysInstancedANGLE;
+                gl.vertexAttribDivisor = (a, b) =>
+                    instanceExt.vertexAttribDivisorANGLE(a, b);
+
+                gl.drawElementsInstanced = (a, b, c, d, e) =>
+                    instanceExt.drawElementsInstancedANGLE(a, b, c, d, e);
+
+                gl.drawArraysInstanced = (a, b, c, d) =>
+                    instanceExt.drawArraysInstancedANGLE(a, b, c, d);
             }
         }
     }
diff --git a/src/core/renderers/webgl/systems/shader/ShaderSystem.js b/src/core/renderers/webgl/systems/shader/ShaderSystem.js
index aaa13df..813816e 100644
--- a/src/core/renderers/webgl/systems/shader/ShaderSystem.js
+++ b/src/core/renderers/webgl/systems/shader/ShaderSystem.js
@@ -1,6 +1,6 @@
 import WebGLSystem from '../WebGLSystem';
 import GLShader from './GLShader';
-import { PRECISION } from '../../../../const';
+import settings from '../../../../settings';
 import generateUniformsSync from '../../../../shader/generateUniformsSync';
 
 let UID = 0;
@@ -138,7 +138,11 @@
             attribMap[i] = program.attributeData[i].location;
         }
 
-        const glShader = new GLShader(this.gl, program.vertexSrc, program.fragmentSrc, PRECISION.DEFAULT, attribMap);
+        const glShader = new GLShader(this.gl,
+                                      program.vertexSrc,
+                                      program.fragmentSrc,
+                                      settings.PRECISION_FRAGMENT,
+                                      attribMap);
 
         program.glShaders[this.renderer.CONTEXT_UID] = glShader;
 

diff --git a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
index c0c6b14..91df41f 100644
--- a/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
+++ b/src/core/renderers/webgl/systems/geometry/GeometrySystem.js
@@ -92,9 +92,14 @@
 
             if (instanceExt)
             {
-                gl.vertexAttribDivisor = instanceExt.vertexAttribDivisorANGLE;
-                gl.drawElementsInstanced = instanceExt.drawElementsInstancedANGLE;
-                gl.drawArraysInstanced = instanceExt.drawArraysInstancedANGLE;
+                gl.vertexAttribDivisor = (a, b) =>
+                    instanceExt.vertexAttribDivisorANGLE(a, b);
+
+                gl.drawElementsInstanced = (a, b, c, d, e) =>
+                    instanceExt.drawElementsInstancedANGLE(a, b, c, d, e);
+
+                gl.drawArraysInstanced = (a, b, c, d) =>
+                    instanceExt.drawArraysInstancedANGLE(a, b, c, d);
             }
         }
     }
diff --git a/src/core/renderers/webgl/systems/shader/ShaderSystem.js b/src/core/renderers/webgl/systems/shader/ShaderSystem.js
index aaa13df..813816e 100644
--- a/src/core/renderers/webgl/systems/shader/ShaderSystem.js
+++ b/src/core/renderers/webgl/systems/shader/ShaderSystem.js
@@ -1,6 +1,6 @@
 import WebGLSystem from '../WebGLSystem';
 import GLShader from './GLShader';
-import { PRECISION } from '../../../../const';
+import settings from '../../../../settings';
 import generateUniformsSync from '../../../../shader/generateUniformsSync';
 
 let UID = 0;
@@ -138,7 +138,11 @@
             attribMap[i] = program.attributeData[i].location;
         }
 
-        const glShader = new GLShader(this.gl, program.vertexSrc, program.fragmentSrc, PRECISION.DEFAULT, attribMap);
+        const glShader = new GLShader(this.gl,
+                                      program.vertexSrc,
+                                      program.fragmentSrc,
+                                      settings.PRECISION_FRAGMENT,
+                                      attribMap);
 
         program.glShaders[this.renderer.CONTEXT_UID] = glShader;
 
diff --git a/test/core/Plane.js b/test/core/Plane.js
index c5243ab..124b7af 100644
--- a/test/core/Plane.js
+++ b/test/core/Plane.js
@@ -18,7 +18,6 @@
             });
     });
 
-
     it('should create a new empty textured Plane', function ()
     {
         const plane = new PIXI.mesh.Plane(PIXI.Texture.EMPTY, 100, 100);
@@ -47,6 +46,5 @@
             expect(plane.containsPoint(point)).to.be.false;
         });
     });
-
      */
 });