diff --git a/test/specs/headers.spec.js b/test/specs/headers.spec.js
index ffc725d5ff..05d0a5edfb 100644
--- a/test/specs/headers.spec.js
+++ b/test/specs/headers.spec.js
@@ -15,7 +15,7 @@ function testHeaderValue(headers, key, val) {
 
   if (!found) {
     if (typeof val === 'undefined') {
-      expect(headers.hasOwnProperty(key)).toEqual(false);
+      expect(Object.prototype.hasOwnProperty.call(headers, key)).toEqual(false);
     } else {
       throw new Error(key + ' was not found in headers');
     }
@@ -38,7 +38,7 @@ describe('headers', function () {
 
     getAjaxRequest().then(function (request) {
       for (const key in headers) {
-        if (headers.hasOwnProperty(key)) {
+        if (Object.prototype.hasOwnProperty.call(headers, key)) {
           expect(request.requestHeaders[key]).toEqual(headers[key]);
         }
       }
@@ -59,7 +59,7 @@ describe('headers', function () {
 
     return getAjaxRequest().then(function (request) {
       for (const key in expectedHeaders) {
-        if (expectedHeaders.hasOwnProperty(key)) {
+        if (Object.prototype.hasOwnProperty.call(expectedHeaders, key)) {
           expect(request.requestHeaders[key]).toEqual(expectedHeaders[key]);
         }
       }