diff --git a/packages/client/ui-settings-models/src/client/OnboardingModal.tsx b/packages/client/ui-settings-models/src/client/OnboardingModal.tsx
index 3e2b25559c..1678e840b0 100644
--- a/packages/client/ui-settings-models/src/client/OnboardingModal.tsx
+++ b/packages/client/ui-settings-models/src/client/OnboardingModal.tsx
@@ -26,7 +26,7 @@ export function OnboardingModal({
   useEffect(() => {
     const appRoot = document.getElementById('root')
     if (appRoot === null) return
-    const previous = appRoot.inert === true
+    const previous = appRoot.inert
     appRoot.inert = true
     return () => { appRoot.inert = previous }
   }, [])
diff --git a/packages/client/ui-settings-models/tests/welcome-store.client.spec.ts b/packages/client/ui-settings-models/tests/welcome-store.client.spec.ts
index 97c026df1a..e1fa7572c3 100644
--- a/packages/client/ui-settings-models/tests/welcome-store.client.spec.ts
+++ b/packages/client/ui-settings-models/tests/welcome-store.client.spec.ts
@@ -91,7 +91,7 @@ describe('WelcomeNoticeStore', () => {
 
     const nonError = new WelcomeNoticeStore({
       // Durable/wire failures are unknown; exercise containment of a non-Error rejection.
-      settings: { describe: () => Promise.reject('offline string') },
+      settings: { describe: () => Promise.reject(new Error('offline string')) },
     } as never)
     await nonError.load()
     expect(nonError.store.getSnapshot().error).toBe('offline string')