diff --git a/test/psbt.spec.ts b/test/psbt.spec.ts
index 4eb32dc..e0eba81 100644
--- a/test/psbt.spec.ts
+++ b/test/psbt.spec.ts
@@ -523,12 +523,9 @@ describe(`Psbt`, () => {
       });
 
       assert.strictEqual(psbt.inputCount, 1);
-      assert.strictEqual(
-        (psbt as any).__CACHE.__TX.ins[0].sequence,
-        0xffffffff,
-      );
+      assert.strictEqual(psbt.txInputs[0].sequence, 0xffffffff);
       psbt.setInputSequence(0, 0);
-      assert.strictEqual((psbt as any).__CACHE.__TX.ins[0].sequence, 0);
+      assert.strictEqual(psbt.txInputs[0].sequence, 0);
     });
 
     it('throws if input index is too high', () => {