diff --git a/README.md b/README.md
index c7518fd41..5b927ac13 100644
--- a/README.md
+++ b/README.md
@@ -215,7 +215,8 @@ Remember, validating can be troublesome sometimes. See [A list of articles about
 
 ## Contributing
 
-We welcome contributions from the community! If you're interested in contributing to this project, please read our [Contribution Guide](CONTRIBUTING.md) to get started.
+
+Community contributions are highly valued! If you’re interested in helping us improve this project, please check out our [Contribution Guide](CONTRIBUTING.md) to get started.
 
 ## License
 
diff --git a/test/validators.test.js b/test/validators.test.js
index 4df91395c..0c4854fc4 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -74,6 +74,60 @@ describe('Validators', () => {
         '"foobar@gmail.com',
         '"foo"bar@gmail.com',
         'foo"bar"@gmail.com',
+          'plainaddress',
+          '@missingusername.com',
+          'username@.missingdomain',
+          'username@domain..com',
+          'username@-domain.com',
+          'username@domain-.com',
+          'username@domain.com-',
+          'user@name@domain.com',
+          'user@domain.c',
+          '.username@domain.com',
+          'username.@domain.com',
+          'username@domain_com.com',
+          'username@domain..com',
+          'username@domain,com',
+          'username@domain;com',
+          'username@domain#com',
+          'username@domain$com',
+          'username@domain!com',
+          'username@domain%com',
+          'username@domain^com',
+          'username@domain&com',
+          'username@domain*com',
+          'username@domain(com',
+          'username@domain)com',
+          'username@domain=com',
+          'username@domain+com',
+          'username@domain|com',
+          'username@domain~com',
+          'username@domain/com',
+          'username@domain\com',
+          'username@domain:com',
+          'username@domain"com',
+          'username@domain\'com',
+          'username@domain`com',
+          'username@domain@domain.com',
+          'user@domain..com..',
+          'user@domain.-com',
+          'user@domaincom',
+          'user@domain com',
+          'user@domain\tcom',
+          'user@domain\ncom',
+          'user@domain\0com',
+          'user@domain\u2028com',
+          'user@domain\u2029com',
+          'user@dom@ain.com',
+          'user@domain.com..',
+          'user@domain..com',
+          'user@domain_com',
+          'user@-domain.com',
+          '-user@domain.com',
+          'user@domain.corporate',
+          'user@localhost',
+          'user@.localhost.com',
+          'user@.com'      
       ],
     });
   });