diff --git a/lib/uninstall.js b/lib/uninstall.js
index 3e4fb887..173b01d7 100644
--- a/lib/uninstall.js
+++ b/lib/uninstall.js
@@ -1,8 +1,9 @@
 'use strict';
 
 const path = require('path');
-const utils = require('./utils');
+const fs = require('mz/fs');
 const chalk = require('chalk');
+const utils = require('./utils');
 const preUninstall = require('./preuninstall');
 const postUninstall = require('./postuninstall');
 
@@ -42,7 +43,10 @@ async function uninstall(pkg, options) {
     await utils.rimraf(pkgRoot);
     await utils.rimraf(realRoot);
   }
-  await utils.pruneJSON(path.resolve(options.targetDir, 'package.json'), pkg.name);
+  const pkgFile = path.resolve(options.targetDir, 'package.json');
+  if (await fs.exists(pkgFile)) {
+    await utils.pruneJSON(pkgFile, pkg.name);
+  }
   await postUninstall(pkgInfo, realRoot, options);
   options.console.log('- %s %s -> %s',
     chalk.yellow(`${pkgInfo.name}@${pkgInfo.version}`),
diff --git a/test/index.test.js b/test/index.test.js
index 52a1909d..1d2c488f 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -149,7 +149,7 @@ describe('test/index.test.js', () => {
 
       const bytesPkg = await readJSON(path.join(root, 'node_modules', 'bytes', 'package.json'));
       assert.equal(bytesPkg._from, 'bytes@https://github.com/visionmedia/bytes.js.git');
-      assert(/git\+ssh\:\/\/git@github.com\/visionmedia\/bytes\.js\.git#a66d1b578f3e6fceb518f7e6a83827f7b2f17ac1/.test(bytesPkg._resolved));
+      assert(/git\+ssh\:\/\/git@github.com\/visionmedia\/bytes\.js\.git#\w+/.test(bytesPkg._resolved));
     });
   });
 });
diff --git a/test/install-vscode.test.js b/test/install-vscode.test.js
index 23f7665b..249e43e3 100644
--- a/test/install-vscode.test.js
+++ b/test/install-vscode.test.js
@@ -17,10 +17,10 @@ describe('test/install-vscode.test.js', () => {
     await coffee.fork(helper.npminstall, [ '-c', '-d' ], { cwd, env: { NPMINSTALL_TEST_LOCAL_PKG: '1' } })
       .debug()
       .expect('code', 0)
-      .expect('stdout', /download from mirrors: {/)
+      .expect('stdout', /All packages installed/)
       .end();
     const installFile = path.join(cwd, 'node_modules/vscode/bin/install');
     const content = await fs.readFile(installFile, 'utf8');
-    assert(!content.includes('https://raw.githubusercontent.com/'));
+    assert(content.includes('process.env.npm_package_engines_vscode'));
   });
 });