diff --git a/packages/taler-wallet-cli/src/integrationtests/test-merchant-instances-urls.ts b/packages/taler-wallet-cli/src/integrationtests/test-merchant-instances-urls.ts
index 009ea2546..35734813b 100644
--- a/packages/taler-wallet-cli/src/integrationtests/test-merchant-instances-urls.ts
+++ b/packages/taler-wallet-cli/src/integrationtests/test-merchant-instances-urls.ts
@@ -132,6 +132,13 @@ export async function runMerchantInstancesUrlsTest(t: GlobalTestState) {
     200,
   );
 
+  // Non-default instances don't allow instance management.
+  await check(
+    `${defaultBaseUrl}instances/foo/private/instances`,
+    "foo",
+    404,
+  );
+
   await check(`${defaultBaseUrl}config`, "foo", 200);
   await check(`${defaultBaseUrl}instances/default/config`, "foo", 200);
   await check(`${defaultBaseUrl}instances/myinst/config`, "foo", 200);