diff --git a/test/specs/headers.spec.js b/test/specs/headers.spec.js
index ffc725d5ff..0e96711b20 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');
     }