diff --git a/cmd.py b/cmd.py
index b845795..d8857cd 100755
--- a/cmd.py
+++ b/cmd.py
@@ -110,6 +110,9 @@ class Commands(object):
     def change_pin(self, args):
         return self.client.change_pin(args.remove)
 
+    def wipe_device(self, args):
+        return self.client.wipe_device()
+
     def load_device(self, args):
         if not args.mnemonic and not args.xprv:
             raise Exception("Please provide mnemonic or xprv")
@@ -151,8 +154,9 @@ class Commands(object):
     set_label.help = 'Set new wallet label'
     change_pin.help = 'Change new PIN or remove existing'
     list_coins.help = 'List all supported coin types by the device'
+    wipe_device.help = 'Reset device to factory defaults and remove all private data.'
     load_device.help = 'Load custom configuration to the device'
-    reset_device.help = 'Perform factory reset of the device and generate new seed'
+    reset_device.help = 'Perform device setup and generate new seed'
     sign_message.help = 'Sign message using address of given path'
     verify_message.help = 'Verify message'
     firmware_update.help = 'Upload new firmware to device (must be in bootloader mode)'
@@ -184,6 +188,8 @@ class Commands(object):
          (('-r', '--remove'), {'action': 'store_true', 'default': False}),
     )
     
+    wipe_device.arguments = ()
+
     load_device.arguments = (
         (('-m', '--mnemonic'), {'type': str, 'nargs': '+'}),
         (('-x', '--xprv'), {'type': str}),
diff --git a/tests/common.py b/tests/common.py
index c1454a4..d2c7ddc 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -17,6 +17,7 @@ class TrezorTest(unittest.TestCase):
 
         self.client.setup_debuglink(button=True, pin_correct=True)
         
+        self.client.wipe_device()
         self.client.load_device_by_mnemonic(
             mnemonic=self.mnemonic1,
             pin=self.pin1,
diff --git a/tests/test_basic.py b/tests/test_basic.py
index e8e71e8..16817df 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -25,16 +25,24 @@ class TestBasic(common.TrezorTest):
         # Ping results in Success(message='Ahoj!')
         self.assertEqual(ping, messages.Success(message='ahoj!'))
 
-    def test_uuid(self):
-        uuid1 = self.client.get_device_id()
+    def test_device_id_same(self):
+        id1 = self.client.get_device_id()
         self.client.init_device()
-        uuid2 = self.client.get_device_id()
+        id2 = self.client.get_device_id()
 
-        # UUID must be at least 12 characters
-        self.assertTrue(len(uuid1) >= 12)
+        # ID must be at least 12 characters
+        self.assertTrue(len(id1) >= 12)
 
         # Every resulf of UUID must be the same
-        self.assertEqual(uuid1, uuid2)
+        self.assertEqual(id1, id2)
+
+    def test_device_id_different(self):
+        id1 = self.client.get_device_id()
+        self.client.wipe_device()
+        id2 = self.client.get_device_id()
+
+        # Device ID must be fresh after every reset
+        self.assertNotEqual(id1, id2)
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/trezorlib/client.py b/trezorlib/client.py
index 2943e48..9e8d902 100755
--- a/trezorlib/client.py
+++ b/trezorlib/client.py
@@ -320,7 +320,15 @@ class TrezorClient(object):
 
         return (signatures, serialized_tx)
 
+    def wipe_device(self):
+        ret = self.call(proto.WipeDevice())
+        self.init_device()
+        return ret
+
     def reset_device(self, display_random, strength, passphrase_protection, pin_protection, label, language):
+        if self.features.initialized:
+            raise Exception("Device is initialized already. Call wipe_device() and try again.")
+
         # Begin with device reset workflow
         msg = proto.ResetDevice(display_random=display_random,
                                            strength=strength,
@@ -341,6 +349,9 @@ class TrezorClient(object):
         return isinstance(resp, proto.Success)
 
     def load_device_by_mnemonic(self, mnemonic, pin, passphrase_protection, label, language):
+        if self.features.initialized:
+            raise Exception("Device is initialized already. Call wipe_device() and try again.")
+
         resp = self.call(proto.LoadDevice(mnemonic=mnemonic, pin=pin,
                                           passphrase_protection=passphrase_protection,
                                           language=language,
@@ -349,6 +360,9 @@ class TrezorClient(object):
         return isinstance(resp, proto.Success)
 
     def load_device_by_xprv(self, xprv, pin, passphrase_protection, label):
+        if self.features.initialized:
+            raise Exception("Device is initialized already. Call wipe_device() and try again.")
+
         if xprv[0:4] not in ('xprv', 'tprv'):
             raise Exception("Unknown type of xprv")