diff --git a/lib/getBufferPadded.js b/lib/getBufferPadded.js
index a5287a5..9b5b645 100644
--- a/lib/getBufferPadded.js
+++ b/lib/getBufferPadded.js
@@ -13,6 +13,9 @@ function getBufferPadded(buffer) {
     var boundary = 4;
     var byteLength = buffer.length;
     var remainder = byteLength % boundary;
+    if (remainder === 0) {
+        return buffer;
+    }
     var padding = (remainder === 0) ? 0 : boundary - remainder;
     var emptyBuffer = Buffer.alloc(padding);
     return Buffer.concat([buffer, emptyBuffer]);
diff --git a/lib/getJsonBufferPadded.js b/lib/getJsonBufferPadded.js
index 135b8f4..f51b4c3 100644
--- a/lib/getJsonBufferPadded.js
+++ b/lib/getJsonBufferPadded.js
@@ -1,9 +1,4 @@
 'use strict';
-var Cesium = require('cesium');
-
-var defaultValue = Cesium.defaultValue;
-var defined = Cesium.defined;
-
 module.exports = getJsonBufferPadded;
 
 /**
@@ -20,7 +15,7 @@ module.exports = getJsonBufferPadded;
 function getJsonBufferPadded(json) {
     var string = JSON.stringify(json);
 
-    var boundary = 8;
+    var boundary = 4;
     var byteLength = Buffer.byteLength(string);
     var remainder = byteLength % boundary;
     var padding = (remainder === 0) ? 0 : boundary - remainder;
diff --git a/specs/data/box/box.gltf b/specs/data/box/box.gltf
deleted file mode 100644
index cc017b1..0000000
--- a/specs/data/box/box.gltf
+++ /dev/null
@@ -1,150 +0,0 @@
-{
-  "accessors": [
-    {
-      "name": "Cube-Mesh_positions",
-      "bufferView": 0,
-      "byteOffset": 0,
-      "componentType": 5126,
-      "count": 24,
-      "min": [
-        -1,
-        -1,
-        -1
-      ],
-      "max": [
-        1,
-        1,
-        1
-      ],
-      "type": "VEC3"
-    },
-    {
-      "name": "Cube-Mesh_normals",
-      "bufferView": 0,
-      "byteOffset": 288,
-      "componentType": 5126,
-      "count": 24,
-      "min": [
-        -1,
-        -1,
-        -1
-      ],
-      "max": [
-        1,
-        1,
-        1
-      ],
-      "type": "VEC3"
-    },
-    {
-      "name": "Cube-Mesh_texcoords",
-      "bufferView": 0,
-      "byteOffset": 576,
-      "componentType": 5126,
-      "count": 24,
-      "min": [
-        0,
-        0
-      ],
-      "max": [
-        1,
-        1
-      ],
-      "type": "VEC2"
-    },
-    {
-      "name": "Cube-Mesh_0_indices",
-      "bufferView": 1,
-      "byteOffset": 0,
-      "componentType": 5123,
-      "count": 36,
-      "min": [
-        0
-      ],
-      "max": [
-        23
-      ],
-      "type": "SCALAR"
-    }
-  ],
-  "asset": {
-    "generator": "obj2gltf",
-    "version": "2.0"
-  },
-  "buffers": [
-    {
-      "name": "buffer",
-      "byteLength": 840,
-      "uri": "data:application/octet-stream;base64,AACAvwAAgL8AAIA/AACAvwAAgD8AAIA/AACAvwAAgD8AAIC/AACAvwAAgL8AAIC/AACAvwAAgL8AAIC/AACAvwAAgD8AAIC/AACAPwAAgD8AAIC/AACAPwAAgL8AAIC/AACAPwAAgL8AAIC/AACAPwAAgD8AAIC/AACAPwAAgD8AAIA/AACAPwAAgL8AAIA/AACAPwAAgL8AAIA/AACAPwAAgD8AAIA/AACAvwAAgD8AAIA/AACAvwAAgL8AAIA/AACAvwAAgL8AAIC/AACAPwAAgL8AAIC/AACAPwAAgL8AAIA/AACAvwAAgL8AAIA/AACAPwAAgD8AAIC/AACAvwAAgD8AAIC/AACAvwAAgD8AAIA/AACAPwAAgD8AAIA/AACAvwAAAAAAAAAAAACAvwAAAAAAAAAAAACAvwAAAAAAAAAAAACAvwAAAAAAAAAAAAAAAAAAAAAAAIC/AAAAAAAAAAAAAIC/AAAAAAAAAAAAAIC/AAAAAAAAAAAAAIC/AACAPwAAAAAAAAAAAACAPwAAAAAAAAAAAACAPwAAAAAAAAAAAACAPwAAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAIA/AAAAAAAAAAAAAIA/AAAAAAAAAAAAAIA/AAAAAAAAgL8AAAAAAAAAAAAAgL8AAAAAAAAAAAAAgL8AAAAAAAAAAAAAgL8AAAAAAAAAAAAAgD8AAAAAAAAAAAAAgD8AAAAAAAAAAAAAgD8AAAAAAAAAAAAAgD8AAAAAAAAAAAAAgD8AAIA/AACAPwAAgD8AAAAAAAAAAAAAAAAAAAAAAACAPwAAgD8AAIA/AACAPwAAAAAAAAAAAAAAAAAAAAAAAIA/AACAPwAAgD8AAIA/AAAAAAAAAAAAAAAAAAAAAAAAgD8AAIA/AACAPwAAgD8AAAAAAAAAAAAAAAAAAAAAAACAPwAAgD8AAIA/AACAPwAAAAAAAAAAAAAAAAAAAAAAAIA/AACAPwAAgD8AAIA/AAAAAAAAAAAAAAAAAAABAAIAAAACAAMABAAFAAYABAAGAAcACAAJAAoACAAKAAsADAANAA4ADAAOAA8AEAARABIAEAASABMAFAAVABYAFAAWABcA"
-    }
-  ],
-  "bufferViews": [
-    {
-      "name": "bufferView_vertex",
-      "buffer": 0,
-      "byteLength": 768,
-      "byteOffset": 0,
-      "target": 34962
-    },
-    {
-      "name": "bufferView_index",
-      "buffer": 0,
-      "byteLength": 72,
-      "byteOffset": 768,
-      "target": 34963
-    }
-  ],
-  "materials": [
-    {
-      "name": "Material",
-      "pbrMetallicRoughness": {
-        "baseColorFactor": [
-          0.64,
-          0.64,
-          0.64,
-          1
-        ],
-        "metallicFactor": 0,
-        "roughnessFactor": 0.903921569
-      },
-      "emissiveFactor": [
-        0,
-        0,
-        0
-      ],
-      "alphaMode": "OPAQUE",
-      "doubleSided": false
-    }
-  ],
-  "meshes": [
-    {
-      "name": "Cube-Mesh",
-      "primitives": [
-        {
-          "attributes": {
-            "POSITION": 0,
-            "NORMAL": 1,
-            "TEXCOORD_0": 2
-          },
-          "indices": 3,
-          "material": 0,
-          "mode": 4
-        }
-      ]
-    }
-  ],
-  "nodes": [
-    {
-      "name": "Cube",
-      "mesh": 0
-    }
-  ],
-  "scene": 0,
-  "scenes": [
-    {
-      "nodes": [
-        0
-      ]
-    }
-  ]
-}