diff --git a/lib/components/Redoc/redoc.spec.ts b/lib/components/Redoc/redoc.spec.ts
index 073810e8..9fc6ae14 100644
--- a/lib/components/Redoc/redoc.spec.ts
+++ b/lib/components/Redoc/redoc.spec.ts
@@ -58,7 +58,7 @@ describe('Redoc components', () => {
     });
 
     it('should return promise', () => {
-      let res = Redoc.init();
+      let res = Redoc.init().catch(() => {/**/});
       res.should.be.instanceof(Promise);
     });
 
@@ -66,7 +66,7 @@ describe('Redoc components', () => {
       spyOn(Redoc, 'hideLoadingAnimation').and.callThrough();
       spyOn(Redoc, 'displayError').and.callThrough();
       let res = Redoc.init();
-      return res.then(() => {
+      return res.catch(() => {
         expect(Redoc.hideLoadingAnimation).toHaveBeenCalled();
         expect(Redoc.displayError).toHaveBeenCalled();
       });
diff --git a/lib/components/Redoc/redoc.ts b/lib/components/Redoc/redoc.ts
index e523a4d3..6a6de353 100644
--- a/lib/components/Redoc/redoc.ts
+++ b/lib/components/Redoc/redoc.ts
@@ -79,10 +79,10 @@ export class Redoc extends BaseComponent implements AfterViewInit {
       Redoc.hideLoadingAnimation();
       Redoc.appRef = appRef;
       console.log('ReDoc bootstrapped!');
-    }, err => {
-      console.log(err);
+    }).catch(err => {
       Redoc.hideLoadingAnimation();
       Redoc.displayError(err);
+      throw err;
     });
   }
 
@@ -97,7 +97,6 @@ export class Redoc extends BaseComponent implements AfterViewInit {
   }
 
   static displayError(err) {
-    console.log(err);
     let redocEl = dom.query('redoc');
     if (!redocEl) return;
     let heading = 'Oops... ReDoc failed to render this spec';
diff --git a/lib/components/SideMenu/side-menu.spec.ts b/lib/components/SideMenu/side-menu.spec.ts
index fce798f3..f4d139d6 100644
--- a/lib/components/SideMenu/side-menu.spec.ts
+++ b/lib/components/SideMenu/side-menu.spec.ts
@@ -1,7 +1,7 @@
 'use strict';
 
 import { getChildDebugElement } from '../../../tests/helpers';
-import { Component, provide } from '@angular/core';
+import { Component } from '@angular/core';
 import { OptionsService } from '../../services/index';
 
 import {
diff --git a/lib/services/schema-normalizer.service.spec.ts b/lib/services/schema-normalizer.service.spec.ts
index 64d11026..cab630df 100644
--- a/lib/services/schema-normalizer.service.spec.ts
+++ b/lib/services/schema-normalizer.service.spec.ts
@@ -111,9 +111,18 @@ describe('Spec Helper', () => {
       let resolved;
       beforeAll(() => {
         let pointer = '/paths/test5/get/parameters/0';
+        spyOn(console, 'warn').and.stub();
         resolved = normalizer.normalize(specMgr.byPointer(pointer), pointer);
       });
 
+      afterAll(() => {
+        (<jasmine.Spy>console.warn).and.callThrough();
+      });
+
+      it('should print warning to console', () => {
+        expect(console.warn).toHaveBeenCalled();
+      });
+
       it('should skip other fields', () => {
         expect(resolved.$ref).toBeUndefined();
         expect(resolved.title).toBeDefined();
diff --git a/tests/schemas/base-component-dereference.json b/tests/schemas/base-component-dereference.json
index df5dcebc..21e9bf41 100644
--- a/tests/schemas/base-component-dereference.json
+++ b/tests/schemas/base-component-dereference.json
@@ -110,8 +110,6 @@
         "parameters": [
           {
             "$ref": "#/definitions/CircularTransitive",
-            "title": "test",
-            "description": "test"
           }
         ]
       }