diff --git a/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts b/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
index 200b70bb7..961de55cd 100644
--- a/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
@@ -5944,13 +5944,26 @@ export function registerProjectWorkbenchFoundationTests() {
         if (command === 'read_local_project_resource_canvas_layout') {
           return {
             schemaVersion: 'game-creator-resource-layout.v1',
-            projectId: args?.expectedProjectId,
+            projectId: manifest.projectId,
             mode: args?.mode,
             revision: 0,
             positions: [],
             updatedAt: 0,
           };
         }
+        if (command === 'update_local_project_resource_canvas_layout') {
+          return {
+            status: 'updated',
+            layout: {
+              schemaVersion: 'game-creator-resource-layout.v1',
+              projectId: manifest.projectId,
+              mode: args?.mode,
+              revision: 1,
+              positions: args?.positions,
+              updatedAt: 1,
+            },
+          };
+        }
         if (command === 'load_ui_design_state') {
           return {
             revision: 0,