diff --git a/tests/NexusMods.EventSourcing.TestModel/Services.cs b/tests/NexusMods.EventSourcing.TestModel/Services.cs
index 80395a81..8854e189 100644
--- a/tests/NexusMods.EventSourcing.TestModel/Services.cs
+++ b/tests/NexusMods.EventSourcing.TestModel/Services.cs
@@ -18,6 +18,7 @@ public static IServiceCollection AddEvents(this IServiceCollection coll)
         coll.AddEvent<Events.SwapModEnabled>();
         coll.AddEvent<Events.RenameLoadout>();
         coll.AddEvent<Events.DeleteMod>();
+        coll.AddEvent<Events.AddCollection>();
         return coll;
     }