diff --git a/.changeset/fix-stripe-mock-listcustomers.md b/.changeset/fix-stripe-mock-listcustomers.md
new file mode 100644
index 0000000000..9364a359ee
--- /dev/null
+++ b/.changeset/fix-stripe-mock-listcustomers.md
@@ -0,0 +1,4 @@
+---
+---
+
+Switch the `stripe-client` `vi.mock` factories in `content-my-content.test.ts` and `admin-endpoints.test.ts` to vitest's `importOriginal` pattern so unmocked exports (e.g. `listCustomersWithOrgIds` called from `OrganizationDatabase.syncStripeCustomers` during `HTTPServer.start`) flow through automatically and stop breaking integration tests.
diff --git a/server/tests/integration/admin-endpoints.test.ts b/server/tests/integration/admin-endpoints.test.ts
index 057d4c9344..9bbb89ac61 100644
--- a/server/tests/integration/admin-endpoints.test.ts
+++ b/server/tests/integration/admin-endpoints.test.ts
@@ -24,8 +24,12 @@ vi.mock('../../src/middleware/csrf.js', () => ({
   csrfProtection: (_req: any, _res: any, next: any) => next(),
 }));
 
-// Mock Stripe client to control subscription checks
-vi.mock('../../src/billing/stripe-client.js', () => ({
+// Mock Stripe client to control subscription checks. Use importOriginal so
+// any unmocked exports (e.g. listCustomersWithOrgIds called from
+// OrganizationDatabase.syncStripeCustomers during HTTPServer.start) flow
+// through to the real implementation instead of throwing.
+vi.mock('../../src/billing/stripe-client.js', async (importOriginal) => ({
+  ...(await importOriginal<typeof import('../../src/billing/stripe-client.js')>()),
   stripe: null,
   getSubscriptionInfo: vi.fn().mockResolvedValue(null),
   createStripeCustomer: vi.fn().mockResolvedValue(null),
diff --git a/server/tests/integration/content-my-content.test.ts b/server/tests/integration/content-my-content.test.ts
index 83d4799342..871107dbb8 100644
--- a/server/tests/integration/content-my-content.test.ts
+++ b/server/tests/integration/content-my-content.test.ts
@@ -66,7 +66,11 @@ vi.mock('../../src/addie/mcp/admin-tools.js', async (importOriginal) => {
   };
 });
 
-vi.mock('../../src/billing/stripe-client.js', () => ({
+// Use importOriginal so any unmocked exports (e.g. listCustomersWithOrgIds
+// called from OrganizationDatabase.syncStripeCustomers during HTTPServer.start)
+// flow through to the real implementation instead of throwing.
+vi.mock('../../src/billing/stripe-client.js', async (importOriginal) => ({
+  ...(await importOriginal<typeof import('../../src/billing/stripe-client.js')>()),
   stripe: null,
   getSubscriptionInfo: vi.fn().mockResolvedValue(null),
   createStripeCustomer: vi.fn().mockResolvedValue(null),