diff --git a/test/node_modules/duplicate_symbols/common.h b/test/node_modules/duplicate_symbols/common.h
index 2fbc3058bb..1c51a214d3 100644
--- a/test/node_modules/duplicate_symbols/common.h
+++ b/test/node_modules/duplicate_symbols/common.h
@@ -28,7 +28,8 @@ Something::PointerCheck(const Nan::FunctionCallbackInfo<v8::Value>& info) {
   } else {
     // If no argument was passed in, we wrap the pointer to the `PointerCheck`
     // method in this addon into a `v8::External` and pass it into JavaScript.
-    v8result = Nan::New<v8::External>(reinterpret_cast<void*>(Something::PointerCheck));
+    v8result = Nan::New<v8::External>(
+        reinterpret_cast<void*>(Something::PointerCheck));
   }
   info.GetReturnValue().Set(v8result);
 }
diff --git a/test/node_modules/duplicate_symbols/package.json b/test/node_modules/duplicate_symbols/package.json
index 2b899ee565..89f80cbdf6 100644
--- a/test/node_modules/duplicate_symbols/package.json
+++ b/test/node_modules/duplicate_symbols/package.json
@@ -5,7 +5,8 @@
   "main": "index.js",
   "private": true,
   "dependencies": {
-    "bindings": "~1.2.1"
+    "bindings": "~1.2.1",
+    "nan": "^2.0.0"
   },
   "scripts": {
     "test": "node index.js"
diff --git a/test/test-addon.js b/test/test-addon.js
index 2c4befcace..12687de2ac 100644
--- a/test/test-addon.js
+++ b/test/test-addon.js
@@ -19,10 +19,8 @@ function runHello(hostProcess) {
   return execFileSync(hostProcess, ['-e', testCode], { cwd: __dirname }).toString()
 }
 
-function runDuplicateBindings(hostProcess) {
-  if (!hostProcess) {
-    hostProcess = process.execPath
-  }
+function runDuplicateBindings() {
+  const hostProcess = process.execPath;
   var testCode =
     "console.log((function(bindings) {" +
     "return bindings.pointerCheck1(bindings.pointerCheck2());" +
@@ -70,15 +68,13 @@ test('make sure addon symbols do not overlap', function (t) {
   var addonPath = path.resolve(__dirname, 'node_modules', 'duplicate_symbols')
   // Set the loglevel otherwise the output disappears when run via 'npm test'
   var cmd = [nodeGyp, 'rebuild', '-C', addonPath, '--loglevel=verbose']
-  var proc = execFile(process.execPath, cmd, function (err, stdout, stderr) {
-    var logLines = stderr.toString().trim().split(/\r?\n/)
+  execFile(process.execPath, cmd, function (err, stdout, stderr) {
+    var logLines = stderr.trim().split(/\r?\n/)
     var lastLine = logLines[logLines.length-1]
     t.strictEqual(err, null)
     t.strictEqual(lastLine, 'gyp info ok', 'should end in ok')
     t.strictEqual(runDuplicateBindings().trim(), 'not equal')
   })
-  proc.stdout.setEncoding('utf-8')
-  proc.stderr.setEncoding('utf-8')
 })
 
 test('build simple addon in path with non-ascii characters', function (t) {