fix tests

Author: shlomiku

tests/test_rest.py

@@ -102,9 +102,9 @@ def test_orders(reqmock):
     "filled_at": "2018-03-09T19:05:27Z",
     "failed_at": "2018-03-09T19:05:27Z",
     "filled_qty": "0",
-    "hwm": None,
-    "trail_percent": None,
-    "trail_price": None,
+    "hwm": null,
+    "trail_percent": null,
+    "trail_price": null,
     "failured_reason": "string",
     "cancel_requested_at": "2018-03-09T19:05:27Z",
     "submitted_at": "2018-03-09T19:05:27Z"
@@ -136,9 +136,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T19:05:27Z",
   "failed_at": "2018-03-09T19:05:27Z",
   "filled_qty": "0",
-  "hwm": None,
-  "trail_percent": None,
-  "trail_price": None,
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T19:05:27Z",
   "submitted_at": "2018-03-09T19:05:27Z"
@@ -224,9 +224,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T05:50:50Z",
   "failed_at": "2018-03-09T05:50:50Z",
   "filled_qty": "0",
-  "hwm": None,
-  "trail_percent": None,
-  "trail_price": None,
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T05:50:50Z",
   "submitted_at": "2018-03-09T05:50:50Z"
@@ -258,9 +258,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T05:50:50Z",
   "failed_at": "2018-03-09T05:50:50Z",
   "filled_qty": "0",
-  "hwm": None,
-  "trail_percent": None,
-  "trail_price": None,
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T05:50:50Z",
   "submitted_at": "2018-03-09T05:50:50Z"