diff --git a/lib/testing/src/lib/protractor/core/utils/date-util.ts b/lib/testing/src/lib/protractor/core/utils/date-util.ts
index 6b28f55a13..e0528e5a0c 100644
--- a/lib/testing/src/lib/protractor/core/utils/date-util.ts
+++ b/lib/testing/src/lib/protractor/core/utils/date-util.ts
@@ -21,8 +21,8 @@ import { DateFnsUtils } from '../../../../../../core/src/lib/common/utils/date-f
 export class DateUtil {
 
     static formatDate(dateFormat: string, date: Date = new Date(), days: number | string = 0): string {
-        if(typeof days === 'string') {
-            days = parseInt(days);
+        if (typeof days === 'string') {
+            days = parseInt(days, 10);
         }
         return DateFnsUtils.formatDate(addDays(date, days), dateFormat);
     }
@@ -32,4 +32,3 @@ export class DateUtil {
     }
 }
 
-