diff --git a/Use-Case-Tests.md b/Use-Case-Tests.md
index 97b9e00..baed482 100644
--- a/Use-Case-Tests.md
+++ b/Use-Case-Tests.md
@@ -20,8 +20,7 @@ ___
     The system notifies the user that the data has been retrieved from the ID card.  
     The full name and the personal identification number of the card’s owner is displayed.  
 ___
-**Extension test cases**  
-**ID card not detected test:**  
+**Extension test: ID card not detected**  
     2. ...  
     3. The user does not put the ID card against the phone during the next 90 seconds.  
 
@@ -30,7 +29,7 @@ ___
     The system notifies that ID card was not detected.  
     The user is back on the home screen of the application.  
 ___
-**Invalid CAN entered test:**
+**Extension test: Invalid CAN entered**
 1. ...  
 2. The user enters an invalid CAN (for example 000000).  
 3. The user puts the ID card against the smartphone.  
@@ -41,7 +40,7 @@ ___
     The user is returned to the application’s home screen.  
 ___
 _Currently not working! More details in release notes._  
-**ID card removed from the smartphone before allowed:**  
+**Extension test: ID card removed from the smartphone before allowed**  
     2. ...  
     3. The user puts the ID card against the smartphone and removes it immediately.  
 
@@ -66,8 +65,7 @@ ___
     The system notifies the user that the CAN has been saved.  
     The CAN is saved and displayed to the user.  
 ___
-**Extension test cases**  
-**Invalid CAN entered test:**
+**Extension test: Invalid CAN entered**
 1. ...  
 2. The user enters an invalid CAN (for example 000000).  
 
@@ -83,7 +81,7 @@ A fine finger
 **Initial system state:**  
 The user has enabled biometric authentication in the application’s settings.  
 The user has saved a valid PIN 1 to the biometric authentication method.  
-?The application has launched to authenticate the user and the user is shown a biometric authentication dialog.  
+The application has launched to authenticate the user and the user is shown a biometric authentication dialog.  
 ___
 **Main success scenario test:**  
 1. The user touches a fingerprint sensor on the device.  
@@ -91,22 +89,24 @@ ___
 **Expected results:**  
     The fingerprint is detected and the application enters PIN 1 for the user automatically.  
 ___
-**Extension test cases**  
-**Device's biometric authentication functionality is inaccessible test:**   
+**Extension test: Device's biometric authentication functionality is inaccessible**   
 
 **Expected results:**  
     The system notifies the user that biometric authentication is currently unavailable.  
     The user is asked to enter PIN 1 manually.  
 ___
-**Invalid fingerprint test:**
+**Extension test: Invalid fingerprint**
 1. ...  
 
 **Expected results:**  
     The system notifies the user that biometric authentication has failed due to a non-matching fingerprint.  
     The user is asked to enter PIN 1 manually.  
 ___
-**Invalid PIN 1 test:**
-1. ...  
+**Extension test: Invalid PIN 1**  
+**Initial system state:**  
+The user has saved an invalid PIN 1 to the biometric authentication method.  
+
+1. ...
 
 **Expected results:**  
     The system notifies the user that biometric authentication has failed, because the saved PIN 1 is invalid.