diff --git a/test/fixtures/default.json b/test/fixtures/default.json
new file mode 100644
index 000000000..af478a4e2
--- /dev/null
+++ b/test/fixtures/default.json
@@ -0,0 +1,71 @@
+{
+   "objName": "Stage",
+   "sounds": [{
+           "soundName": "pop",
+           "soundID": -1,
+           "md5": "83a9787d4cb6f3b7632b4ddfebf74367.wav",
+           "sampleCount": 258,
+           "rate": 11025,
+           "format": ""
+       }],
+   "costumes": [{
+           "costumeName": "backdrop1",
+           "baseLayerID": -1,
+           "baseLayerMD5": "739b5e2a2435f6e1ec2993791b423146.png",
+           "bitmapResolution": 1,
+           "rotationCenterX": 240,
+           "rotationCenterY": 180
+       }],
+   "currentCostumeIndex": 0,
+   "penLayerMD5": "5c81a336fab8be57adc039a8a2b33ca9.png",
+   "penLayerID": -1,
+   "tempoBPM": 60,
+   "videoAlpha": 0.5,
+   "children": [{
+           "objName": "Sprite1",
+           "sounds": [{
+                   "soundName": "meow",
+                   "soundID": -1,
+                   "md5": "83c36d806dc92327b9e7049a565c6bff.wav",
+                   "sampleCount": 18688,
+                   "rate": 22050,
+                   "format": ""
+               }],
+           "costumes": [{
+                   "costumeName": "costume1",
+                   "baseLayerID": -1,
+                   "baseLayerMD5": "09dc888b0b7df19f70d81588ae73420e.svg",
+                   "bitmapResolution": 1,
+                   "rotationCenterX": 47,
+                   "rotationCenterY": 55
+               },
+               {
+                   "costumeName": "costume2",
+                   "baseLayerID": -1,
+                   "baseLayerMD5": "3696356a03a8d938318876a593572843.svg",
+                   "bitmapResolution": 1,
+                   "rotationCenterX": 47,
+                   "rotationCenterY": 55
+               }],
+           "currentCostumeIndex": 0,
+           "scratchX": 0,
+           "scratchY": 0,
+           "scale": 1,
+           "direction": 90,
+           "rotationStyle": "normal",
+           "isDraggable": false,
+           "indexInLibrary": 1,
+           "visible": true,
+           "spriteInfo": {
+           }
+       }],
+   "info": {
+       "videoOn": false,
+       "userAgent": "Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/50.0.2661.102 Safari\/537.36",
+       "swfVersion": "v446",
+       "scriptCount": 0,
+       "spriteCount": 1,
+       "hasCloudData": false,
+       "flashVersion": "MAC 21,0,0,242"
+   }
+}
diff --git a/test/fixtures/demo.json b/test/fixtures/demo.json
new file mode 100644
index 000000000..b10376ec7
--- /dev/null
+++ b/test/fixtures/demo.json
@@ -0,0 +1,359 @@
+{
+	"objName": "Stage",
+	"variables": [{
+			"name": "x",
+			"value": "1",
+			"isPersistent": false
+		},
+		{
+			"name": "y",
+			"value": "1",
+			"isPersistent": false
+		},
+		{
+			"name": "z",
+			"value": "1",
+			"isPersistent": false
+		},
+		{
+			"name": "d",
+			"value": "1",
+			"isPersistent": false
+		},
+		{
+			"name": "a",
+			"value": 4,
+			"isPersistent": false
+		}],
+	"lists": [{
+			"listName": "D# Minor Pentatonic",
+			"contents": ["78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"78",
+				"73",
+				"75",
+				"75",
+				"78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"75",
+				"78",
+				"73",
+				"75",
+				"78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"73",
+				"68",
+				"70",
+				"66",
+				"68",
+				"63"],
+			"isPersistent": false,
+			"x": 5,
+			"y": 32,
+			"width": 125,
+			"height": 206,
+			"visible": true
+		}],
+	"scripts": [[52,
+			8,
+			[["whenIReceive", "start"],
+				["setVar:to:", "a", "1"],
+				["doRepeat",
+					["lineCountOfList:", "D# Minor Pentatonic"],
+					[["noteOn:duration:elapsed:from:", ["getLine:ofList:", ["readVariable", "a"], "D# Minor Pentatonic"], 0.5], ["changeVar:by:", "a", 1]]]]],
+		[53,
+			186,
+			[["whenIReceive", "start"],
+				["setVar:to:", "x", "1"],
+				["rest:elapsed:from:", 7.25],
+				["doRepeat",
+					["lineCountOfList:", "D# Minor Pentatonic"],
+					[["noteOn:duration:elapsed:from:", ["getLine:ofList:", ["readVariable", "x"], "D# Minor Pentatonic"], 0.25], ["changeVar:by:", "x", 1]]]]],
+		[48,
+			557,
+			[["whenIReceive", "start"],
+				["setVar:to:", "z", "1"],
+				["rest:elapsed:from:", 13],
+				["doRepeat",
+					["lineCountOfList:", "D# Minor Pentatonic"],
+					[["noteOn:duration:elapsed:from:", ["getLine:ofList:", ["readVariable", "z"], "D# Minor Pentatonic"], 0.0625], ["changeVar:by:", "z", 1]]]]],
+		[49,
+			368,
+			[["whenIReceive", "start"],
+				["setVar:to:", "y", "1"],
+				["rest:elapsed:from:", 11],
+				["doRepeat",
+					["lineCountOfList:", "D# Minor Pentatonic"],
+					[["noteOn:duration:elapsed:from:", ["getLine:ofList:", ["readVariable", "y"], "D# Minor Pentatonic"], 0.125], ["changeVar:by:", "y", 1]]]]],
+		[52,
+			745,
+			[["whenIReceive", "start"],
+				["setVar:to:", "d", "1"],
+				["rest:elapsed:from:", 13.5],
+				["doRepeat",
+					["lineCountOfList:", "D# Minor Pentatonic"],
+					[["noteOn:duration:elapsed:from:", ["getLine:ofList:", ["readVariable", "d"], "D# Minor Pentatonic"], 0.03125], ["changeVar:by:", "d", 1]]]]]],
+	"sounds": [{
+			"soundName": "pop",
+			"soundID": 0,
+			"md5": "83a9787d4cb6f3b7632b4ddfebf74367.wav",
+			"sampleCount": 258,
+			"rate": 11025,
+			"format": ""
+		}],
+	"costumes": [{
+			"costumeName": "backdrop1",
+			"baseLayerID": 4,
+			"baseLayerMD5": "b61b1077b0ea1931abee9dbbfa7903ff.png",
+			"bitmapResolution": 2,
+			"rotationCenterX": 480,
+			"rotationCenterY": 360
+		}],
+	"currentCostumeIndex": 0,
+	"penLayerMD5": "5c81a336fab8be57adc039a8a2b33ca9.png",
+	"penLayerID": 0,
+	"tempoBPM": 60,
+	"videoAlpha": 0.5,
+	"children": [{
+			"objName": "Indicator",
+			"scripts": [[247.85,
+					32.8,
+					[["procDef", "foo %n", ["bar"], [1], false],
+						["hide"],
+						["clearPenTrails"],
+						["penColor:", 5968094],
+						["say:", ["getParam", "bar", "r"]],
+						["stopScripts", "this script"]]],
+				[41, 36, [["whenGreenFlag"], ["call", "foo %n", 1]]]],
+			"sounds": [{
+					"soundName": "pop",
+					"soundID": 0,
+					"md5": "83a9787d4cb6f3b7632b4ddfebf74367.wav",
+					"sampleCount": 258,
+					"rate": 11025,
+					"format": ""
+				}],
+			"costumes": [{
+					"costumeName": "costume1",
+					"baseLayerID": 1,
+					"baseLayerMD5": "d36f6603ec293d2c2198d3ea05109fe0.png",
+					"bitmapResolution": 2,
+					"rotationCenterX": 0,
+					"rotationCenterY": 0
+				}],
+			"currentCostumeIndex": 0,
+			"scratchX": 22,
+			"scratchY": -26,
+			"scale": 1,
+			"direction": 90,
+			"rotationStyle": "normal",
+			"isDraggable": false,
+			"indexInLibrary": 3,
+			"visible": false,
+			"spriteInfo": {
+			}
+		},
+		{
+			"target": "Stage",
+			"cmd": "timer",
+			"param": null,
+			"color": 2926050,
+			"label": "timer",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 5,
+			"y": 5,
+			"visible": false
+		},
+		{
+			"target": "Stage",
+			"cmd": "getVar:",
+			"param": "x",
+			"color": 15629590,
+			"label": "x",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 5,
+			"y": 268,
+			"visible": true
+		},
+		{
+			"target": "Stage",
+			"cmd": "getVar:",
+			"param": "y",
+			"color": 15629590,
+			"label": "y",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 5,
+			"y": 295,
+			"visible": true
+		},
+		{
+			"target": "Stage",
+			"cmd": "getVar:",
+			"param": "z",
+			"color": 15629590,
+			"label": "z",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 78,
+			"y": 268,
+			"visible": true
+		},
+		{
+			"objName": "Play",
+			"scripts": [[32, 33, [["whenClicked"], ["broadcast:", "start"]]]],
+			"sounds": [{
+					"soundName": "pop",
+					"soundID": 0,
+					"md5": "83a9787d4cb6f3b7632b4ddfebf74367.wav",
+					"sampleCount": 258,
+					"rate": 11025,
+					"format": ""
+				}],
+			"costumes": [{
+					"costumeName": "costume1",
+					"baseLayerID": 2,
+					"baseLayerMD5": "30f811366ae3a53e6447932cc7f0212d.png",
+					"bitmapResolution": 2,
+					"rotationCenterX": 68,
+					"rotationCenterY": 115
+				}],
+			"currentCostumeIndex": 0,
+			"scratchX": 2,
+			"scratchY": -48,
+			"scale": 1,
+			"direction": 90,
+			"rotationStyle": "normal",
+			"isDraggable": false,
+			"indexInLibrary": 1,
+			"visible": true,
+			"spriteInfo": {
+			}
+		},
+		{
+			"target": "Stage",
+			"cmd": "getVar:",
+			"param": "d",
+			"color": 15629590,
+			"label": "d",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 5,
+			"y": 241,
+			"visible": true
+		},
+		{
+			"target": "Stage",
+			"cmd": "getVar:",
+			"param": "a",
+			"color": 15629590,
+			"label": "a",
+			"mode": 1,
+			"sliderMin": 0,
+			"sliderMax": 100,
+			"isDiscrete": true,
+			"x": 78,
+			"y": 241,
+			"visible": true
+		},
+		{
+			"objName": "Stop",
+			"scripts": [[45, 104, [["whenClicked"], ["stopScripts", "all"]]]],
+			"sounds": [{
+					"soundName": "pop",
+					"soundID": 0,
+					"md5": "83a9787d4cb6f3b7632b4ddfebf74367.wav",
+					"sampleCount": 258,
+					"rate": 11025,
+					"format": ""
+				}],
+			"costumes": [{
+					"costumeName": "costume1",
+					"baseLayerID": 3,
+					"baseLayerMD5": "3de406f265b8d664406adf7c70762514.png",
+					"bitmapResolution": 2,
+					"rotationCenterX": 68,
+					"rotationCenterY": 70
+				}],
+			"currentCostumeIndex": 0,
+			"scratchX": 121,
+			"scratchY": -33,
+			"scale": 1,
+			"direction": 90,
+			"rotationStyle": "normal",
+			"isDraggable": false,
+			"indexInLibrary": 2,
+			"visible": true,
+			"spriteInfo": {
+			}
+		},
+		{
+			"listName": "D# Minor Pentatonic",
+			"contents": ["78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"78",
+				"73",
+				"75",
+				"75",
+				"78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"75",
+				"78",
+				"73",
+				"75",
+				"78",
+				"75",
+				"73",
+				"75",
+				"70",
+				"73",
+				"68",
+				"70",
+				"66",
+				"68",
+				"63"],
+			"isPersistent": false,
+			"x": 5,
+			"y": 32,
+			"width": 125,
+			"height": 206,
+			"visible": true
+		}],
+	"info": {
+		"spriteCount": 3,
+		"projectID": "118381369",
+		"videoOn": false,
+		"hasCloudData": false,
+		"userAgent": "Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/53.0.2785.143 Safari\/537.36",
+		"scriptCount": 9,
+		"flashVersion": "MAC 23,0,0,185",
+		"swfVersion": "v450.1"
+	}
+}
diff --git a/test/unit/import_sb2.js b/test/unit/import_sb2.js
new file mode 100644
index 000000000..be4d62864
--- /dev/null
+++ b/test/unit/import_sb2.js
@@ -0,0 +1,88 @@
+var fs = require('fs');
+var path = require('path');
+var test = require('tap').test;
+
+var clone = require('../../src/sprites/clone');
+var runtime = require('../../src/engine/runtime');
+var sb2 = require('../../src/import/sb2import');
+
+test('spec', function (t) {
+    t.type(sb2, 'function');
+    t.end();
+});
+
+test('default', function (t) {
+    // Get SB2 JSON (string)
+    var uri = path.resolve(__dirname, '../fixtures/default.json');
+    var file = fs.readFileSync(uri, 'utf8');
+
+    // Create runtime instance & load SB2 into it
+    var rt = new runtime();
+    sb2(file, rt);
+
+    // Test
+    t.type(file, 'string');
+    t.type(rt, 'object');
+    t.type(rt.targets, 'object');
+
+    t.ok(rt.targets[0] instanceof clone);
+    t.type(rt.targets[0].id, 'string');
+    t.type(rt.targets[0].blocks, 'object');
+    t.type(rt.targets[0].variables, 'object');
+    t.type(rt.targets[0].lists, 'object');
+
+    t.equal(rt.targets[0].isOriginal, true);
+    t.equal(rt.targets[0].currentCostume, 0);
+    t.equal(rt.targets[0].isOriginal, true);
+    t.equal(rt.targets[0].isStage, true);
+
+    t.ok(rt.targets[1] instanceof clone);
+    t.type(rt.targets[1].id, 'string');
+    t.type(rt.targets[1].blocks, 'object');
+    t.type(rt.targets[1].variables, 'object');
+    t.type(rt.targets[1].lists, 'object');
+
+    t.equal(rt.targets[1].isOriginal, true);
+    t.equal(rt.targets[1].currentCostume, 0);
+    t.equal(rt.targets[1].isOriginal, true);
+    t.equal(rt.targets[1].isStage, false);
+    t.end();
+});
+
+test('demo', function (t) {
+    // Get SB2 JSON (string)
+    var uri = path.resolve(__dirname, '../fixtures/demo.json');
+    var file = fs.readFileSync(uri, 'utf8');
+
+    // Create runtime instance & load SB2 into it
+    var rt = new runtime();
+    sb2(file, rt);
+
+    // Test
+    t.type(file, 'string');
+    t.type(rt, 'object');
+    t.type(rt.targets, 'object');
+
+    t.ok(rt.targets[0] instanceof clone);
+    t.type(rt.targets[0].id, 'string');
+    t.type(rt.targets[0].blocks, 'object');
+    t.type(rt.targets[0].variables, 'object');
+    t.type(rt.targets[0].lists, 'object');
+
+    t.equal(rt.targets[0].isOriginal, true);
+    t.equal(rt.targets[0].currentCostume, 0);
+    t.equal(rt.targets[0].isOriginal, true);
+    t.equal(rt.targets[0].isStage, true);
+
+    t.ok(rt.targets[1] instanceof clone);
+    t.type(rt.targets[1].id, 'string');
+    t.type(rt.targets[1].blocks, 'object');
+    t.type(rt.targets[1].variables, 'object');
+    t.type(rt.targets[1].lists, 'object');
+
+    t.equal(rt.targets[1].isOriginal, true);
+    t.equal(rt.targets[1].currentCostume, 0);
+    t.equal(rt.targets[1].isOriginal, true);
+    t.equal(rt.targets[1].isStage, false);
+    t.end();
+});