diff --git a/mailcheck/mailcheck-tests.ts b/mailcheck/mailcheck-tests.ts
index 4a5caa12a..b3152b1d9 100644
--- a/mailcheck/mailcheck-tests.ts
+++ b/mailcheck/mailcheck-tests.ts
@@ -14,6 +14,7 @@ var superStringDistance = function(string1: string, string2: string): number {
 
 $('#email').on('blur', function() {
     $(this).mailcheck({
+        email: 'nonoptional@example.com',
         domains: domains,                       // optional
         secondLevelDomains: secondLevelDomains, // optional
         topLevelDomains: topLevelDomains,       // optional
@@ -28,6 +29,7 @@ $('#email').on('blur', function() {
 });
 
 Mailcheck.run({
+    email: 'nonoptional@example.com',
     domains: domains,                       // optional
     secondLevelDomains: secondLevelDomains, // optional
     topLevelDomains: topLevelDomains,       // optional
@@ -41,6 +43,7 @@ Mailcheck.run({
 });
 
 MC.run({
+    email: 'nonoptional@example.com',
     domains: domains,                       // optional
     secondLevelDomains: secondLevelDomains, // optional
     topLevelDomains: topLevelDomains,       // optional