diff --git a/tests/test_msg_ethereum_signtx.py b/tests/test_msg_ethereum_signtx.py
index c423b79..2e7b326 100644
--- a/tests/test_msg_ethereum_signtx.py
+++ b/tests/test_msg_ethereum_signtx.py
@@ -61,6 +61,79 @@ class TestMsgEthereumSigntx(common.TrezorTest):
         self.assertEqual(binascii.hexlify(sig_r), '4e90b13c45c6a9bf4aaad0e5427c3e62d76692b36eb727c78d332441b7400404')
         self.assertEqual(binascii.hexlify(sig_s), '3ff236e7d05f0f9b1ee3d70599bb4200638f28388a8faf6bb36db9e04dc544be')
 
+    def test_ethereum_signtx_message(self):
+        self.setup_mnemonic_nopin_nopassphrase()
+
+        sig_v, sig_r, sig_s = self.client.ethereum_sign_tx(
+            n=[0, 0],
+            nonce=0,
+            gas_price=20000,
+            gas_limit=20000,
+            to=binascii.unhexlify('1d1c328764a41bda0492b66baa30c4a339ff85ef'),
+            value=0,
+            data='ABCDEFGHIJKLMNOP' * 256 + '!!!')
+        self.assertEqual(sig_v, 28)
+        self.assertEqual(binascii.hexlify(sig_r), '070e9dafda4d9e733fa7b6747a75f8a4916459560efb85e3e73cd39f31aa160d')
+        self.assertEqual(binascii.hexlify(sig_s), '7842db33ef15c27049ed52741db41fe3238a6fa3a6a0888fcfb74d6917600e41')
+
+
+    def test_ethereum_signtx_newcontract(self):
+        self.setup_mnemonic_nopin_nopassphrase()
+
+        # contract creation without data should fail.
+        self.assertRaises(Exception, self.client.ethereum_sign_tx,
+            n=[0, 0],
+            nonce=123456,
+            gas_price=20000,
+            gas_limit=20000,
+            to='',
+            value=12345678901234567890)
+
+        sig_v, sig_r, sig_s = self.client.ethereum_sign_tx(
+            n=[0, 0],
+            nonce=0,
+            gas_price=20000,
+            gas_limit=20000,
+            to='',
+            value=12345678901234567890,
+            data='ABCDEFGHIJKLMNOP' * 256 + '!!!')
+        self.assertEqual(sig_v, 28)
+        self.assertEqual(binascii.hexlify(sig_r), 'b401884c10ae435a2e792303b5fc257a09f94403b2883ad8c0ac7a7282f5f1f9')
+        self.assertEqual(binascii.hexlify(sig_s), '4742fc9e6a5fa8db3db15c2d856914a7f3daab21603a6c1ce9e9927482f8352e')
+
+    def test_ethereum_sanity_checks(self):
+        # gas overflow
+        self.assertRaises(Exception, self.client.ethereum_sign_tx,
+            n=[0, 0],
+            nonce=123456,
+            gas_price=0xffffffffffffffffffffffffffffffff,
+            gas_limit=0xffffffffffffffffffffffffffffff,
+            to=binascii.unhexlify('1d1c328764a41bda0492b66baa30c4a339ff85ef'),
+            value=12345678901234567890)
+
+        # no gas price
+        self.assertRaises(Exception, self.client.ethereum_sign_tx,
+            n=[0, 0],
+            nonce=123456,
+            gas_limit=10000,
+            to=binascii.unhexlify('1d1c328764a41bda0492b66baa30c4a339ff85ef'),
+            value=12345678901234567890)
+
+        # no gas limit
+        self.assertRaises(Exception, self.client.ethereum_sign_tx,
+            n=[0, 0],
+            nonce=123456,
+            gas_price=10000,
+            to=binascii.unhexlify('1d1c328764a41bda0492b66baa30c4a339ff85ef'),
+            value=12345678901234567890)
+
+        # no nonce
+        self.assertRaises(Exception, self.client.ethereum_sign_tx,
+            n=[0, 0],
+            gas_price=10000,
+            gas_limit=123456,
+            to=binascii.unhexlify('1d1c328764a41bda0492b66baa30c4a339ff85ef'),
+            value=12345678901234567890)
 
 if __name__ == '__main__':
     unittest.main()