fix callback

lib/tests/run_tests.js

@@ -47,7 +47,7 @@ module.exports = {
           next(null, files);
         });
       },
-      function setupGlobalNamespace(next) {
+      function setupGlobalNamespace(files, next) {
         // TODO put default config
         const test = new Test();
         global.embark = test;
@@ -78,7 +78,9 @@ module.exports = {
         };
 
         console.info('Compiling contracts'.cyan);
-        test.init(next);
+        test.init((err) => {
+          next(err, files);
+        });
       },
       function executeForAllFiles(files, next) {
         async.eachLimit(files, 1, (file, eachCb) => {