diff --git a/lib/launcher.ts b/lib/launcher.ts
index 6a92e20ea..51dc5b53c 100644
--- a/lib/launcher.ts
+++ b/lib/launcher.ts
@@ -3,6 +3,8 @@
  * input configuration and launching test runners.
  */
 import * as fs from 'fs';
+let {mkdirp} = require('mkdirp');
+import * as path from 'path';
 import * as q from 'q';
 
 import {Config} from './config';
@@ -43,6 +45,10 @@ class TaskResults {
   }
 
   saveResults(filepath: string): void {
+    let dirname = path.dirname(filepath);
+    if (!fs.existsSync(dirname)) {
+      mkdirp.sync(dirname);
+    }
     let jsonOutput = this.results_.reduce((jsonOutput, result) => {
       return jsonOutput.concat(result.specResults);
     }, []);
diff --git a/package.json b/package.json
index b3a13bdd0..7f23cf50a 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,7 @@
     "jshint": "^2.9.2",
     "lodash": "^4.5.1",
     "marked": "^0.3.3",
+    "mkdirp": "^0.5.1",
     "mocha": "2.5.3",
     "rimraf": "~2.5.3",
     "run-sequence": "^1.1.5",