diff --git a/aio/src/app/layout/doc-viewer/doc-viewer.component.spec.ts b/aio/src/app/layout/doc-viewer/doc-viewer.component.spec.ts
index 302a025a44..b6f4988271 100644
--- a/aio/src/app/layout/doc-viewer/doc-viewer.component.spec.ts
+++ b/aio/src/app/layout/doc-viewer/doc-viewer.component.spec.ts
@@ -180,7 +180,7 @@ describe('DocViewerComponent', () => {
         const querySelector_ = targetEl.querySelector;
         spyOn(targetEl, 'querySelector').and.callFake((selector: string) => {
           const elem = querySelector_.call(targetEl, selector);
-          return Object.defineProperties(elem, {
+          return elem && Object.defineProperties(elem, {
             innerText: {value: undefined},
             textContent: {value: 'Text Content'},
           });
@@ -195,7 +195,7 @@ describe('DocViewerComponent', () => {
         const querySelector_ = targetEl.querySelector;
         spyOn(targetEl, 'querySelector').and.callFake((selector: string) => {
           const elem = querySelector_.call(targetEl, selector);
-          return Object.defineProperties(elem, {
+          return elem && Object.defineProperties(elem, {
             innerText: { value: '' },
             textContent: { value: 'Text Content' }
           });
diff --git a/aio/src/karma.conf.js b/aio/src/karma.conf.js
index 032dd41453..6394bdc9d1 100644
--- a/aio/src/karma.conf.js
+++ b/aio/src/karma.conf.js
@@ -15,9 +15,6 @@ module.exports = function (config) {
     client:{
       clearContext: false // leave Jasmine Spec Runner output visible in browser
     },
-    files: [
-      { pattern: './node_modules/@angular/material/prebuilt-themes/indigo-pink.css', included: true }
-    ],
     coverageIstanbulReporter: {
       reports: [ 'html', 'lcovonly' ],
       fixWebpackSourcePaths: true