diff --git a/lib/index.spec.js b/lib/index.spec.js
new file mode 100644
index 00000000..1ee1d0bb
--- /dev/null
+++ b/lib/index.spec.js
@@ -0,0 +1,26 @@
+'use strict';
+import {init} from 'lib/index';
+
+describe('Redoc init', () => {
+  it('should return promise', () => {
+    let res = init();
+    res.should.be.instanceof(Promise);
+  });
+
+  it('should reject promise for not specifed url', (done) => {
+    let res = init();
+    res.then(() => { done.fail('Should not been called'); }, () => {
+      done();
+    });
+  });
+
+  //skip because of PhantomJS crashes on this testcase
+  xit('should init redoc', (done) => {
+    var node = document.createElement('redoc');
+    document.body.appendChild(node);
+    let res = init('/tests/schemas/extended-petstore.json');
+    res.then(() => { done(); }, () => {
+      done.fail('Error handler should not been called');
+    });
+  });
+});