diff --git a/package.json b/package.json
index 088d878..2ac0e00 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
   "license": "MIT",
   "devDependencies": {
     "is-async-supported": "^1.2.0",
+    "run-series": "^1.1.4",
     "tape": "^4.9.0"
   },
   "browser": {
diff --git a/test/node/index.js b/test/node/index.js
index 470b809..a3a807f 100644
--- a/test/node/index.js
+++ b/test/node/index.js
@@ -1,8 +1,21 @@
-var spawn = require('child_process').spawnSync;
+var spawn = require('child_process').spawn;
+var path = require('path');
+var series = require('run-series');
 
-spawn(process.argv[0], [ require.resolve('./debug') ], { stdio: 'inherit' });
-spawn(process.argv[0], [ require.resolve('./format') ], { stdio: 'inherit' });
-spawn(process.argv[0], [ require.resolve('./inspect') ], { stdio: 'inherit' });
-spawn(process.argv[0], [ require.resolve('./log') ], { stdio: 'inherit' });
-spawn(process.argv[0], [ require.resolve('./promisify') ], { stdio: 'inherit' });
-spawn(process.argv[0], [ require.resolve('./callbackify') ], { stdio: 'inherit' });
+function test(filename) {
+  return function(cb) {
+    var proc = spawn(process.argv[0], [ filename ], { stdio: 'inherit' });
+    proc.on('close', function (code) {
+      cb(code !== 0 ? new Error('test ' + path.basename(filename) + ' failed') : null);
+    });
+  };
+}
+
+series([
+  test(require.resolve('./debug')),
+  test(require.resolve('./format')),
+  test(require.resolve('./inspect')),
+  test(require.resolve('./log')),
+  test(require.resolve('./promisify')),
+  test(require.resolve('./callbackify'))
+]);