diff --git a/package-lock.json b/package-lock.json
index 3b63a1e..3049081 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7887,6 +7887,12 @@
         "tslib": "^2.0.3"
       }
     },
+    "node-blob": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/node-blob/-/node-blob-0.0.2.tgz",
+      "integrity": "sha512-82wiGzMht96gPQDUYaZBdZEVvYD9aEhU6Bt9KLCr4rADZPRd7dQVY2Yj0ZG/1vp4DhVkL49nJT/M3CiMTAt3ag==",
+      "dev": true
+    },
     "node-fetch": {
       "version": "2.6.1",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz",
@@ -9274,7 +9280,7 @@
     },
     "scratch-vm": {
       "version": "git://github.com/TurboWarp/scratch-vm.git#dbae5fe7d680c80fd59e244c86f4e55b4a41829c",
-      "from": "git://github.com/TurboWarp/scratch-vm.git#dbae5fe7d680c80fd59e244c86f4e55b4a41829c",
+      "from": "git://github.com/TurboWarp/scratch-vm.git#develop",
       "requires": {
         "@vernier/godirect": "1.5.0",
         "arraybuffer-loader": "^1.0.6",
diff --git a/package.json b/package.json
index 03555f4..969e189 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "file-loader": "^6.2.0",
     "html-webpack-plugin": "^4.5.2",
     "jest": "^27.0.4",
+    "node-blob": "0.0.2",
     "node-fetch": "^2.6.1",
     "style-loader": "^2.0.0",
     "svelte-loader": "^3.1.2",
diff --git a/test/packager/download-project.test.js b/test/packager/download-project.test.js
new file mode 100644
index 0000000..8b98b8e
--- /dev/null
+++ b/test/packager/download-project.test.js
@@ -0,0 +1,32 @@
+import fs from 'fs';
+import path from 'path';
+import Blob from 'node-blob';
+import downloadProject from '../../src/packager/lib/download-project'
+
+global.Blob = Blob;
+
+const emptyProgressCallback = () => {};
+
+const readTestProject = (name) => {
+  const buffer = fs.readFileSync(path.resolve(__dirname, 'projects', name));
+  return buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
+};
+
+test('sb3', async () => {
+  const project = await downloadProject(await readTestProject('no-music.sb3'), emptyProgressCallback);
+  expect(project.type).toBe('sb3');
+  expect(project.analysis.stageVariables['`jEk@4|i[#Fk?(8x)AV.-my variable']).toEqual({
+    name: 'my variable',
+    isCloud: false
+  });
+  expect(project.analysis.stageVariables['BHEUfE_ev.6Eib^2/3nu']).toEqual({
+    name: '☁ Cloud variable',
+    isCloud: true
+  });
+  expect(project.analysis.usesMusic).toBe(false);
+});
+
+test('sb3 with music', async () => {
+  const project = await downloadProject(await readTestProject('music.sb3'), emptyProgressCallback);
+  expect(project.analysis.usesMusic).toBe(true);
+});
diff --git a/test/packager/projects/music.sb3 b/test/packager/projects/music.sb3
new file mode 100644
index 0000000..91e7ac3
Binary files /dev/null and b/test/packager/projects/music.sb3 differ
diff --git a/test/packager/projects/no-music.sb3 b/test/packager/projects/no-music.sb3
new file mode 100644
index 0000000..2f3589d
Binary files /dev/null and b/test/packager/projects/no-music.sb3 differ