diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index b18de65a2e..d6e70f7c40 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -13,7 +13,7 @@ def validate_user(username, minlen):
     if len(username) < minlen:
         return False
     # Usernames can only use letters, numbers, dots and underscores
-    if not re.match('^[a-z0-9._]*$', username):
+    if  re.match('^[._]', username):
         return False
     # Usernames can't begin with a number
     if username[0].isnumeric():
@@ -21,4 +21,8 @@ def validate_user(username, minlen):
     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