diff --git a/test/psbt.js b/test/psbt.js
new file mode 100644
index 0000000..9422d6e
--- /dev/null
+++ b/test/psbt.js
@@ -0,0 +1,43 @@
+const { describe, it, beforeEach } = require('mocha')
+const assert = require('assert')
+
+const ECPair = require('../src/ecpair')
+const Psbt = require('..').Psbt
+
+// For now, just hardcoding some test values is fine
+// const fixtures = require('./fixtures/psbt')
+
+describe(`Psbt`, () => {
+  // constants
+  const keyPair = ECPair.fromPrivateKey(Buffer.from('0000000000000000000000000000000000000000000000000000000000000001', 'hex'))
+
+  describe('signInput', () => {
+    it('throws if non-witness UTXO hash doesn\'t match the hash specified in the prevout', () => {
+      const inputUtxo = '0200000001c1602ba68c8c241450a78b61dbfde272989181d07537b1e70d31b7db939557f2000000006a473044022029872b97579850c87658e431bb9df4a3f3e41590777529a55e25eb11eccafef50220511700aa1ea2c2cd499251f99014f22c5af63a00c76fd24da650014a0a8199e901210264187d9ee773aa333ac223678478b1df3ea268178fc9447e0a60c443eddaa749fdffffff01995d0000000000001976a914759d6677091e973b9e9d99f19c68fbf43e3f05f988acc8d30800'
+      const inputHash = 'd2d00ff71b1d1920d3a7717274b720f3d8230d9f38ec8f3e6867a207f2a40092'
+      const inputIndex = 0
+
+      const psbt = new Psbt()
+      psbt.addInput({hash: inputHash, index: inputIndex})
+      psbt.addNonWitnessUtxoToInput(inputIndex, Buffer.from(inputUtxo, 'hex'))
+
+      assert.throws(() => {
+        psbt.signInput(inputIndex, keyPair)
+      })
+    })
+
+    it('does not throw if non-witness UTXO hash matches the hash specified in the prevout', () => {
+      const inputUtxo = '01000000027dddcf79a2e541030bc753871d1c9d4dc163e4d6bd5aefae4bd84de64e16a652000000008b483045022100d3a2c3b58ae0f0b551711aa8949f478724428efa03f3179c3a50dc2c9ace46aa02201b2da84a21429a10af187731c882fc1f727e7b89573e07f0192e9e3de79fabf00141040e3a759c33b03e1af8e5d86fb447a40eff244c847a4f8274276db490054e8be076f8801ddc9c5246ee86b6f33cfe38e8b7e57ab9db390eb3ec1ec6ae9eeea113fdffffff4fef6d7f3c1e5d0bea733b2fd644fa456cdf73f21eb7e8866a2721d79266e9e8010000008a4730440220284a2989d45c48a6c8a556b30b3467eaf6abf866ec75c4d9f0e3872074f62c070220686ad82869c1669e6be162c4a34e4c617a971766f2b9688789eb2f498fe5eb6b0141040e3a759c33b03e1af8e5d86fb447a40eff244c847a4f8274276db490054e8be076f8801ddc9c5246ee86b6f33cfe38e8b7e57ab9db390eb3ec1ec6ae9eeea113fdffffff0224c70d00000000001976a914da6473ed373e08f46dd8003fca7ba72fbe9c555e88ac9cb00e00000000001976a91449707992598f85a31aa6715af70fe507610b6f8b88ac11c00800'
+      const inputHash = 'd2d00ff71b1d1920d3a7717274b720f3d8230d9f38ec8f3e6867a207f2a40092'
+      const inputIndex = 0
+
+      const psbt = new Psbt()
+      psbt.addInput({hash: inputHash, index: inputIndex})
+      psbt.addNonWitnessUtxoToInput(inputIndex, Buffer.from(inputUtxo, 'hex'))
+
+      assert.doesNotThrow(() => {
+        psbt.signInput(inputIndex, keyPair)
+      })
+    })
+  })
+})