diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index b18de65a2e..f0a4adb3f3 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -22,3 +22,10 @@ def validate_user(username, minlen):
 
 
 
+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