diff --git a/tests/test_msg_signtx.py b/tests/test_msg_signtx.py
index e2b9438..a5caee9 100644
--- a/tests/test_msg_signtx.py
+++ b/tests/test_msg_signtx.py
@@ -523,5 +523,43 @@ class TestMsgSigntx(common.TrezorTest):
         # Now run the attack, must trigger the exception
         self.assertRaises(CallException, self.client.sign_tx, 'Bitcoin', [inp1, inp2], [out1, out2], attack_processor)
 
+    def test_spend_coinbase(self):
+        # 25 TEST generated to m/1 (mfiGQVPcRcaEvQPYDErR34DcCovtxYvUUV)
+        # tx: d6da21677d7cca5f42fbc7631d062c9ae918a0254f7c6c22de8e8cb7fd5b8236
+        # input 0: 25.0027823 BTC
+
+        self.setup_mnemonic_nopin_nopassphrase()
+
+
+        inp1 = proto_types.TxInputType(address_n=[1],  # mfiGQVPcRcaEvQPYDErR34DcCovtxYvUUV
+                             # amount=390000,
+                             prev_hash=binascii.unhexlify('d6da21677d7cca5f42fbc7631d062c9ae918a0254f7c6c22de8e8cb7fd5b8236'),
+                             prev_index=0,
+                             )
+
+        out1 = proto_types.TxOutputType(address='mm6FM31rM5Vc3sw5D7kztiBg3jHUzyqF1g',
+                              amount=2500278230 - 10000,
+                              script_type=proto_types.PAYTOADDRESS,
+                              )
+
+        with self.client:
+            self.client.set_tx_api(TXAPITestnet())
+            self.client.set_expected_responses([
+                proto.TxRequest(request_type=proto_types.TXINPUT, details=proto_types.TxRequestDetailsType(request_index=0)),
+                proto.TxRequest(request_type=proto_types.TXMETA, details=proto_types.TxRequestDetailsType(tx_hash=binascii.unhexlify("d6da21677d7cca5f42fbc7631d062c9ae918a0254f7c6c22de8e8cb7fd5b8236"))),
+                proto.TxRequest(request_type=proto_types.TXINPUT, details=proto_types.TxRequestDetailsType(request_index=0, tx_hash=binascii.unhexlify("d6da21677d7cca5f42fbc7631d062c9ae918a0254f7c6c22de8e8cb7fd5b8236"))),
+                proto.TxRequest(request_type=proto_types.TXOUTPUT, details=proto_types.TxRequestDetailsType(request_index=0, tx_hash=binascii.unhexlify("d6da21677d7cca5f42fbc7631d062c9ae918a0254f7c6c22de8e8cb7fd5b8236"))),
+                proto.TxRequest(request_type=proto_types.TXINPUT, details=proto_types.TxRequestDetailsType(request_index=0)),
+                proto.TxRequest(request_type=proto_types.TXOUTPUT, details=proto_types.TxRequestDetailsType(request_index=0)),
+                proto.ButtonRequest(code=proto_types.ButtonRequest_ConfirmOutput),
+                proto.ButtonRequest(code=proto_types.ButtonRequest_SignTx),
+                proto.TxRequest(request_type=proto_types.TXOUTPUT, details=proto_types.TxRequestDetailsType(request_index=0)),
+                proto.TxRequest(request_type=proto_types.TXFINISHED),
+            ])
+            (signatures, serialized_tx) = self.client.sign_tx('Testnet', [inp1, ], [out1, ])
+
+        # Accepted by network: tx
+        self.assertEqual(binascii.hexlify(serialized_tx), '010000000136825bfdb78c8ede226c7c4f25a018e99a2c061d63c7fb425fca7c7d6721dad6000000006a473044022047845c366eb24f40be315c7815a154513c444c7989eb80f7ce7ff6aeb703d26a022007c1f5efadf67c5889634fd7ac39a7ce78bffac291673e8772ecd8389c901d9f01210338d78612e990f2eea0c426b5e48a8db70b9d7ed66282b3b26511e0b1c75515a6ffffffff01c6100795000000001976a9143d2496e67f5f57a924353da42d4725b318e7a8ea88ac00000000')
+
 if __name__ == '__main__':
     unittest.main()