diff --git a/apps/ai-game-creator-shell/tests/appSurface/harness.ts b/apps/ai-game-creator-shell/tests/appSurface/harness.ts
index 71d427a97..4d88b4f80 100644
--- a/apps/ai-game-creator-shell/tests/appSurface/harness.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface/harness.ts
@@ -471,7 +471,9 @@ function createProjectSupervisorRuntimeHarness({
         currentProjectMessages.push({
           schemaVersion: 'game-creator-conversation.v1',
           ...message,
-          ...(args?.messageId ? { messageId: String(args.messageId) } : {}),
+          ...(args?.messageId
+            ? { messageId: String(args.messageId) }
+            : {}),
           updatedAt:
             typeof message.updatedAt === 'number'
               ? message.updatedAt
@@ -515,7 +517,7 @@ function createProjectSupervisorRuntimeHarness({
         currentRuntime = runtimeState({
           runId,
           runProfile: args?.runProfile,
-          source: args?.source,
+          source: args?.source ?? 'project-supervisor',
           status: 'running',
           phase: 'planning',
           currentTask: String(args?.task ?? ''),