diff --git a/Use-Case-Tests.md b/Use-Case-Tests.md
index 618c209..52f5a46 100644
--- a/Use-Case-Tests.md
+++ b/Use-Case-Tests.md
@@ -347,3 +347,26 @@ ___
 **Expected results:**  
  The application notifies the user that the PIN2 provided was incorrect.  
  The application cancels the authentication process and directs the user back to the requesting application.
+
+# **Test Case #9 (new)**  
+**Use Case being tested:**  
+[Use Case #12](https://github.com/TanelOrumaa/Estonian-ID-card-mobile-authenticator-POC/wiki/Use-Cases#use-case-12-new) : Save PIN 1 of the ID card on the phone  
+**Inputs:**  
+The PIN 1 of an ID card  
+**Initial system state:**  
+The application’s home screen is active.  
+___
+**Main success scenario test:**  
+ 1. The user opens the app's settings and chooses to save the PIN 1 of the ID card.  
+ 2. The user enters PIN 1 with a length 4..12.
+ 3. The user clicks on the 'continue' button.
+
+**Expected results:**  
+ The application notifies the user that the PIN 1 has been saved.
+ The PIN 1 is saved.  
+___
+**Extension test:** Input length is not in range 4..12
+
+**Expected results:**  
+ The application notifies the user that input is does not meet PIN 1 length requirements.  
+