diff --git a/freqtrade/tests/exchange/test_exchange.py b/freqtrade/tests/exchange/test_exchange.py
index 605e7d9ab..d9bea3e60 100644
--- a/freqtrade/tests/exchange/test_exchange.py
+++ b/freqtrade/tests/exchange/test_exchange.py
@@ -227,7 +227,7 @@ def test_cancel_order_dry_run(default_conf, mocker):
     default_conf['dry_run'] = True
     mocker.patch.dict('freqtrade.exchange._CONF', default_conf)
 
-    assert cancel_order(order_id='123',pair='ABC_XYZ') is None
+    assert cancel_order(order_id='123', pair='ABC_XYZ') is None
 
 
 # Ensure that if not dry_run, we should call API
@@ -237,7 +237,7 @@ def test_cancel_order(default_conf, mocker):
     api_mock = MagicMock()
     api_mock.cancel_order = MagicMock(return_value=123)
     mocker.patch('freqtrade.exchange._API', api_mock)
-    assert cancel_order(order_id='_',pair='ABC_XYZ') == 123
+    assert cancel_order(order_id='_', pair='ABC_XYZ') == 123
 
 
 def test_get_order(default_conf, mocker):
@@ -247,9 +247,9 @@ def test_get_order(default_conf, mocker):
     order.myid = 123
     order.pair = 'ABC_XYZ'
     exchange._DRY_RUN_OPEN_ORDERS['X'] = order
-    print(exchange.get_order('X','ABC_XYZ'))
-    assert exchange.get_order('X','ABC_XYZ').myid == 123
-    assert exchange.get_order('X','ABC_XYZ').pair == 'ABC_XYZ'
+    print(exchange.get_order('X', 'ABC_XYZ'))
+    assert exchange.get_order('X', 'ABC_XYZ').myid == 123
+    assert exchange.get_order('X', 'ABC_XYZ').pair == 'ABC_XYZ'
 
     default_conf['dry_run'] = False
     mocker.patch.dict('freqtrade.exchange._CONF', default_conf)
diff --git a/freqtrade/tests/exchange/test_exchange_bittrex.py b/freqtrade/tests/exchange/test_exchange_bittrex.py
index 7f5a53cfd..08e438e47 100644
--- a/freqtrade/tests/exchange/test_exchange_bittrex.py
+++ b/freqtrade/tests/exchange/test_exchange_bittrex.py
@@ -264,27 +264,27 @@ def test_exchange_bittrex_get_ticker_history():
 def test_exchange_bittrex_get_order():
     wb = make_wrap_bittrex()
     fb = FakeBittrex()
-    order = wb.get_order('someUUID','somePAIR')
+    order = wb.get_order('someUUID', 'somePAIR')
     assert order['id'] == 'ABC123'
     fb.success = False
     with pytest.raises(btx.OperationalException, match=r'lost'):
-        wb.get_order('someUUID','somePAIR')
+        wb.get_order('someUUID', 'somePAIR')
 
 
 def test_exchange_bittrex_cancel_order():
     wb = make_wrap_bittrex()
     fb = FakeBittrex()
-    wb.cancel_order('someUUID','somePAIR')
+    wb.cancel_order('someUUID', 'somePAIR')
     with pytest.raises(btx.OperationalException, match=r'no such order'):
         fb.success = False
-        wb.cancel_order('someUUID','somePAIR')
+        wb.cancel_order('someUUID', 'somePAIR')
     # Note: this can be a bug in exchange.bittrex._validate_response
     with pytest.raises(KeyError):
         fb.result = {'success': False}  # message is missing!
-        wb.cancel_order('someUUID','somePAIR')
+        wb.cancel_order('someUUID', 'somePAIR')
     with pytest.raises(btx.OperationalException, match=r'foo'):
         fb.result = {'success': False, 'message': 'foo'}
-        wb.cancel_order('someUUID','somePAIR')
+        wb.cancel_order('someUUID', 'somePAIR')
 
 
 def test_exchange_get_pair_detail_url():