diff --git a/notus/Tests/UnitTests_Model/Database_Tests.cs b/notus/Tests/UnitTests_Model/Database_Tests.cs
index 0d908b7..1698b23 100644
--- a/notus/Tests/UnitTests_Model/Database_Tests.cs
+++ b/notus/Tests/UnitTests_Model/Database_Tests.cs
@@ -155,7 +155,7 @@ namespace UnitTests_Model
         {
             Theme theme = new Theme("Theme1", ",,,".Split().ToList());
             database.ThemeList.Add(theme);
-            Assert.Throws<AlreadyUsedException>(() => database.AddTheme(theme));
+            Assert.Throws<AlreadyExistException>(() => database.AddTheme(theme));
         }
 
         // GetTheme tests