diff --git a/packages/fast-usdc/test/exos/transaction-feed.test.ts b/packages/fast-usdc/test/exos/transaction-feed.test.ts
index 5f11c504dc2..ff3f2705aa6 100644
--- a/packages/fast-usdc/test/exos/transaction-feed.test.ts
+++ b/packages/fast-usdc/test/exos/transaction-feed.test.ts
@@ -79,6 +79,21 @@ test('happy aggregation', async t => {
   });
 });
 
+test('disabled operator', async t => {
+  const feedKit = makeFeedKit();
+  const { op1 } = await makeOperators(feedKit);
+  const evidence = MockCctpTxEvidences.AGORIC_PLUS_OSMO();
+
+  // works before disabling
+  await op1.operator.submitEvidence(evidence);
+
+  op1.admin.disable();
+
+  await t.throwsAsync(() => op1.operator.submitEvidence(evidence), {
+    message: 'submitEvidence for disabled operator',
+  });
+});
+
 // TODO: find a way to get this working
 test.skip('forged source', async t => {
   const feedKit = makeFeedKit();