diff --git a/lib/runner/mocha-runner/mocha-adapter.js b/lib/runner/mocha-runner/mocha-adapter.js
index f47ab6706..21f5491df 100644
--- a/lib/runner/mocha-runner/mocha-adapter.js
+++ b/lib/runner/mocha-runner/mocha-adapter.js
@@ -171,16 +171,16 @@ module.exports = class MochaAdapter extends EventEmitter {
         return this._browserAgent.getBrowser()
             .then((browser) => this._browser = browser) // we need to save browser to use it in a proxy reporter
             .then(() => {
-                const browser = this._browser;
                 const fullTitle = test.fullTitle();
+                const browser = this._browser;
                 const start = Date.now();
 
                 return q.ninvoke(workers, 'runTest', fullTitle, {browserId: browser.id, sessionId: browser.sessionId})
                     .then((data) => this._extendTestInfo(test, data.meta))
-                    .catch((data) => {
-                        this._extendTestInfo(test, data.meta);
+                    .catch((err) => {
+                        this._extendTestInfo(test, err.meta);
 
-                        return q.reject(data.err);
+                        return q.reject(err);
                     })
                     .finally(() => {
                         test.time = Date.now() - start;
diff --git a/lib/worker/index.js b/lib/worker/index.js
index 68013373a..085123173 100644
--- a/lib/worker/index.js
+++ b/lib/worker/index.js
@@ -24,5 +24,5 @@ exports.syncConfig = (config, cb) => {
 exports.runTest = (fullTitle, options, cb) => {
     hermione.runTest(fullTitle, options)
         .then((data) => cb(null, data))
-        .catch((data) => cb(data));
+        .catch((err) => cb(err));
 };
diff --git a/lib/worker/runner/mocha-runner/mocha-adapter.js b/lib/worker/runner/mocha-runner/mocha-adapter.js
index b50d6b9f5..eb11655bb 100644
--- a/lib/worker/runner/mocha-runner/mocha-adapter.js
+++ b/lib/worker/runner/mocha-runner/mocha-adapter.js
@@ -242,7 +242,7 @@ module.exports = class MochaAdapter extends EventEmitter {
         this._mocha.run(() => {
             const meta = this._browser.meta;
 
-            return this._fail ? defer.reject({err: this._fail, meta}) : defer.resolve({meta});
+            return this._fail ? defer.reject(_.extend(this._fail, {meta})) : defer.resolve({meta});
         });
 
         return defer.promise;
diff --git a/test/lib/runner/mocha-runner/mocha-adapter.js b/test/lib/runner/mocha-runner/mocha-adapter.js
index 26ea981f6..af5ebdd03 100644
--- a/test/lib/runner/mocha-runner/mocha-adapter.js
+++ b/test/lib/runner/mocha-runner/mocha-adapter.js
@@ -409,7 +409,8 @@ describe('mocha-runner/mocha-adapter', () => {
     describe('run', () => {
         function stubWorkers() {
             const stub = sandbox.stub();
-            return {runTest: stub.yields.apply(stub, arguments)};
+            const args = arguments.length ? arguments : [null, {}];
+            return {runTest: stub.yields.apply(stub, args)};
         }
 
         it('should request browser before suite execution', () => {
@@ -463,7 +464,7 @@ describe('mocha-runner/mocha-adapter', () => {
 
             MochaStub.lastInstance.updateSuiteTree((suite) => suite.addTest());
 
-            return mochaAdapter.run()
+            return mochaAdapter.run(stubWorkers())
                 .then(() => {
                     assert.calledOnce(logger.warn);
                     assert.calledWithMatch(logger.warn, /some-error/);
@@ -480,7 +481,7 @@ describe('mocha-runner/mocha-adapter', () => {
 
                 MochaStub.lastInstance.updateSuiteTree((suite) => suite.addTest());
 
-                return mochaAdapter.run().then(() => {
+                return mochaAdapter.run(stubWorkers()).then(() => {
                     assert.calledOnceWith(browserAgent.freeBrowser, browser, {force: false});
                 });
             });
@@ -492,7 +493,7 @@ describe('mocha-runner/mocha-adapter', () => {
                 MochaStub.lastInstance.updateSuiteTree((suite) => suite.addTest());
                 mochaAdapter.emit(RunnerEvents.TEST_FAIL, {err: {message: 'other-error'}});
 
-                return mochaAdapter.run().then(() => {
+                return mochaAdapter.run(stubWorkers()).then(() => {
                     assert.calledOnceWith(browserAgent.freeBrowser, sinon.match.any, {force: false});
                 });
             });
@@ -504,7 +505,7 @@ describe('mocha-runner/mocha-adapter', () => {
                 MochaStub.lastInstance.updateSuiteTree((suite) => suite.addTest());
                 mochaAdapter.emit(RunnerEvents.TEST_FAIL, {err: {message: 'SOME-ERROR'}});
 
-                return mochaAdapter.run().then(() => {
+                return mochaAdapter.run(stubWorkers()).then(() => {
                     assert.calledOnceWith(browserAgent.freeBrowser, sinon.match.any, {force: true});
                 });
             });
@@ -540,7 +541,7 @@ describe('mocha-runner/mocha-adapter', () => {
 
             MochaStub.lastInstance.updateSuiteTree((suite) => suite.addTest().onFail(testFailSpy));
 
-            return mochaAdapter.run(stubWorkers({err: {some: 'err'}}))
+            return mochaAdapter.run(stubWorkers({some: 'err'}))
                 .then(() => {
                     assert.calledOnce(testFailSpy);
                     assert.calledWithMatch(testFailSpy, {error: {some: 'err'}});