diff --git a/src/renderer/src/components/terminal-workspace-surface-ids.test.tsx b/src/renderer/src/components/terminal-workspace-surface-ids.test.tsx
index 770b1cfc47b..f6d26b6620a 100644
--- a/src/renderer/src/components/terminal-workspace-surface-ids.test.tsx
+++ b/src/renderer/src/components/terminal-workspace-surface-ids.test.tsx
@@ -84,6 +84,7 @@ describe('workspace surface ids', () => {
       activeWorktreeDeferralHostId: null,
       activityTerminalPortals: [],
       backgroundMountTabIdsByWorktreeRef: { current: new Map() },
+      backgroundMountColdRestorePaneKeysRef: { current: new Map() },
       groupsByWorktree: {},
       hydrationSucceeded: false,
       lastActivationWorktreeIdRef: { current: null },