diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index b18de65a2e..9c9b3c04df 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -15,10 +15,16 @@ def validate_user(username, minlen):
     # Usernames can only use letters, numbers, dots and underscores
     if not re.match('^[a-z0-9._]*$', username):
         return False
+    # Usernames can't begin with "." or underscore
+    if username[0]=='.' or username[0]=='_':
+        return False
     # Usernames can't begin with a number
     if username[0].isnumeric():
         return False
     return True
 
-
+print(validate_user("blue.kale", 3)) # True
+print(validate_user(".blue.kale", 3)) # Currently True, should be False
+print(validate_user("red_quinoa", 4)) # True
+print(validate_user("_red_quinoa", 4)) # Currently True, should be False