diff --git a/test/tx-test.js b/test/tx-test.js
index 983a48f0..ea1fdc9d 100644
--- a/test/tx-test.js
+++ b/test/tx-test.js
@@ -206,6 +206,7 @@ describe('TX', function() {
           if (comments === 'Duplicate inputs') {
             it('should handle duplicate input test' + suffix + ': ' + comments, function () {
               clearCache(tx, nocache);
+              assert.ok(tx.verify(null, true, flags));
               assert.ok(!tx.isSane());
             });
             return;