diff --git a/packages/core/test/session-create.test.ts b/packages/core/test/session-create.test.ts
index e2c87a8593..a34e9121fc 100644
--- a/packages/core/test/session-create.test.ts
+++ b/packages/core/test/session-create.test.ts
@@ -34,6 +34,7 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: ProjectV2.ID.global, directory }),
     directories: () => Effect.succeed([]),
+    update: () => Effect.die("unused"),
     commit: () => Effect.void,
   }),
 )