diff --git a/packages/core/src/accounts.ts b/packages/core/src/accounts.ts
index 48e62d4..9ebfa3d 100644
--- a/packages/core/src/accounts.ts
+++ b/packages/core/src/accounts.ts
@@ -606,8 +606,9 @@ export class FallbackAccountManager {
     this.quotaTimer = null
   }
 
-  async getUsableFallbackAccounts() {
-    const storage = await this.load()
+  async getUsableFallbackAccounts(existingStorage?: AccountStorage | null) {
+    const storage =
+      existingStorage !== undefined ? existingStorage : await this.load()
     if (!storage) return []
     const usable: OAuthAccount[] = []
     let changed = false