fix TestIsExistingEmail(): bar.coffee -> driftaway.coffee
diff --git a/validator_test.go b/validator_test.go
index e2400d9..0179168 100644
--- a/validator_test.go
+++ b/validator_test.go
@@ -645,7 +645,7 @@
 		{"foo@bar.com", true},
 		{"foo@bar.com.au", true},
 		{"foo+bar@bar.com", true},
-		{"foo@bar.coffee", true},
+		{"foo@driftaway.coffee", true},
 		{"foo@bar.coffee..coffee", false},
 		{"invalidemail@", false},
 		{"invalid.com", false},