diff --git a/src/test/java/CreateUserTest.java b/src/test/java/CreateUserTest.java
index 49c202f..f3e4c19 100644
--- a/src/test/java/CreateUserTest.java
+++ b/src/test/java/CreateUserTest.java
@@ -2,6 +2,7 @@ import static org.junit.jupiter.api.Assertions.*;
 import org.junit.jupiter.api.Test;
 import java.io.File;
 import java.util.List;
+import static org.junit.jupiter.api.Assertions.*;
 
 class CreateUserTest {
 
@@ -58,7 +59,38 @@ class CreateUserTest {
         // Clean up - delete the test file after the test
         File file = new File(filename);
         file.delete();
+	}
+        
+        @Test
+        public void testUpdateStayLoggedIn() {
+        String filename = "test_users.json";
+        String id = "3";
+        String userName = "testUser3";
+        String password = "password789";
+        String birthday = "2002-01-01";
+        String firstName = "Jack";
+        String surname = "Doe";
+
+            // Create a user
+            CreateUser user = new CreateUser(id, userName, password, birthday, firstName, surname);
+
+            // Save user to JSON file
+            user.saveToJsonFile(filename);
+
+            // Update stayLoggedIn flag
+            CreateUser.updateStayLoggedIn(filename, userName, true);
+
+            // Read updated user from JSON file
+            List<CreateUser> userList = CreateUser.readUserListFromJsonFile(filename);
+
+            // Ensure that the stayLoggedIn flag is updated
+            assertTrue(userList.get(0).isStayLoggedIn());
+
+            // Clean up - delete the test file after the test
+            File file = new File(filename);
+            file.delete();
+        }
     }
 
 
-}
+