diff --git a/tests/device_tests/test_msg_nem_signtx.py b/tests/device_tests/test_msg_nem_signtx.py
new file mode 100644
index 0000000000..7793752413
--- /dev/null
+++ b/tests/device_tests/test_msg_nem_signtx.py
@@ -0,0 +1,97 @@
+# This file is part of the TREZOR project.
+#
+# Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+import unittest
+import common
+import binascii
+
+from trezorlib import messages_pb2 as proto
+from trezorlib import types_pb2 as proto_types
+
+# tx hash: 209368053ac61969b6838ceb7e31badeb622ed6aa42d6c58365c42ad1a11e19d
+SIGNATURE_TESTNET_SIMPLE = binascii.unhexlify(
+    "9cda2045324d05c791a4fc312ecceb62954e7740482f8df8928560d63cf273dea595023640179f112de755c79717757ef76962175378d6d87360ddb3f3e5f70f"
+)
+
+# tx hash: 9f8741194576a090bc71a3f43a03855950f94278fa121e99203e45967e19a7d0
+SIGNATURE_TESTNET_XEM_AS_MOSAIC = binascii.unhexlify(
+    "1bca7b1b9ffb16d2c2adffa665be072bd2d7a0eafe4a9911dc473500c272905edf3d626274deb52aa490137a276d1fca67ee487079ebf9c09f9faa414f8e7c02"
+)
+
+
+class TestMsgNEMSigntx(common.TrezorTest):
+
+    def test_nem_signtx_simple(self):
+        self.setup_mnemonic_nopin_nopassphrase()
+
+        with self.client:
+            self.client.set_expected_responses([
+                # Confirm transfer and network fee
+                proto.ButtonRequest(code=proto_types.ButtonRequest_ConfirmOutput),
+                # Unencrypted message
+                proto.ButtonRequest(code=proto_types.ButtonRequest_ConfirmOutput),
+                # Confirm recipient
+                proto.ButtonRequest(code=proto_types.ButtonRequest_SignTx),
+                proto.NEMSignedTx(signature=SIGNATURE_TESTNET_SIMPLE),
+            ])
+
+            self.client.nem_sign_tx(self.client.expand_path("m/44'/1'/0'/0'/0'"), {
+                "timeStamp": 74649215,
+                "amount": 2000000,
+                "fee": 2000000,
+                "recipient": "TALICE2GMA34CXHD7XLJQ536NM5UNKQHTORNNT2J",
+                "type": 257,
+                "deadline": 74735615,
+                "message": {
+                    "payload": binascii.hexlify(b"test_nem_transaction_transfer"),
+                    "type": 1,
+                },
+                "version": (0x98 << 24),
+            })
+
+    def test_nem_signtx_xem_as_mosaic(self):
+        self.setup_mnemonic_nopin_nopassphrase()
+
+        with self.client:
+            self.client.set_expected_responses([
+                # Confirm transfer and network fee
+                proto.ButtonRequest(code=proto_types.ButtonRequest_ConfirmOutput),
+                # Confirm recipient
+                proto.ButtonRequest(code=proto_types.ButtonRequest_SignTx),
+                proto.NEMSignedTx(signature=SIGNATURE_TESTNET_XEM_AS_MOSAIC),
+            ])
+
+            self.client.nem_sign_tx(self.client.expand_path("m/44'/1'/0'/0'/0'"), {
+                "timeStamp": 76809215,
+                "amount": 1000000,
+                "fee": 1000000,
+                "recipient": "TALICE2GMA34CXHD7XLJQ536NM5UNKQHTORNNT2J",
+                "type": 257,
+                "deadline": 76895615,
+                "version": (0x98 << 24),
+                "message": {
+                },
+                "mosaics": [
+                    {
+                        "mosaicId": {
+                            "namespaceId": "nem",
+                            "name": "xem",
+                        },
+                        "quantity": 1000000,
+                    },
+                ],
+            })