diff --git a/freqtrade/exchange/__init__.py b/freqtrade/exchange/__init__.py
index aa3e6b07a..8f793fba4 100644
--- a/freqtrade/exchange/__init__.py
+++ b/freqtrade/exchange/__init__.py
@@ -1,17 +1,14 @@
 # pragma pylint: disable=W0603
 """ Cryptocurrency Exchanges support """
-import enum
 import logging
 import ccxt
 from random import randint
 from typing import List, Dict, Any, Optional
 
 import arrow
-import requests
 from cachetools import cached, TTLCache
 
 from freqtrade import OperationalException
-from freqtrade.exchange.interface import Exchange
 
 logger = logging.getLogger(__name__)
 
diff --git a/freqtrade/main.py b/freqtrade/main.py
index 91336bcbb..9d9a386f6 100755
--- a/freqtrade/main.py
+++ b/freqtrade/main.py
@@ -468,7 +468,7 @@ def gen_pair_whitelist(base_currency: str, key: str = 'BaseVolume') -> List[str]
     :param key: sort key (defaults to 'BaseVolume')
     :return: List of pairs
     """
-    
+
     pairs = sorted(
         [s['symbol'] for s in exchange.get_markets() if s['quote'] == base_currency],
         reverse=True
diff --git a/freqtrade/rpc/telegram.py b/freqtrade/rpc/telegram.py
index 987228947..366dd9037 100644
--- a/freqtrade/rpc/telegram.py
+++ b/freqtrade/rpc/telegram.py
@@ -412,7 +412,7 @@ def _balance(bot: Bot, update: Update) -> None:
                     *Balance*: {total}
                     *Pending*: {used}
                     *Est. BTC*: {BTCequiv: .8f}
-                    
+
                     """.format(**balance)
 
     symbol = _CONF['fiat_display_currency']
diff --git a/freqtrade/tests/exchange/test_exchange.py b/freqtrade/tests/exchange/test_exchange.py
index b916e6d63..8cd102a94 100644
--- a/freqtrade/tests/exchange/test_exchange.py
+++ b/freqtrade/tests/exchange/test_exchange.py
@@ -1,10 +1,9 @@
 # pragma pylint: disable=missing-docstring, C0103, bad-continuation, global-statement
 # pragma pylint: disable=protected-access
-from unittest.mock import Mock, MagicMock, PropertyMock
+from unittest.mock import MagicMock, PropertyMock
 from random import randint
 import logging
 import ccxt
-from requests.exceptions import RequestException
 import pytest
 
 from freqtrade import OperationalException
@@ -226,13 +225,13 @@ def test_get_ticker_history(default_conf, mocker):
     assert ticks == 123
 
     # change the ticker
-    #tick = 999
-    #api_mock.get_ticker_history = MagicMock(return_value=tick)
-    #mocker.patch('freqtrade.exchange._API', api_mock)
+    # tick = 999
+    # api_mock.get_ticker_history = MagicMock(return_value=tick)
+    # mocker.patch('freqtrade.exchange._API', api_mock)
 
     # ensure caching will still return the original ticker
-    #ticks = get_ticker_history('ETH/BTC', int(default_conf['ticker_interval']))
-    #assert ticks == 123
+    # ticks = get_ticker_history('ETH/BTC', int(default_conf['ticker_interval']))
+    # assert ticks == 123
 
 
 def test_cancel_order_dry_run(default_conf, mocker):
@@ -280,7 +279,12 @@ def test_get_name(default_conf, mocker):
 
 def test_get_fee(default_conf, mocker):
     api_mock = MagicMock()
-    api_mock.calculate_fee = MagicMock(return_value={'type': 'taker', 'currency': 'BTC', 'rate': 0.025, 'cost': 0.05})
+    api_mock.calculate_fee = MagicMock(return_value={
+        'type': 'taker',
+        'currency': 'BTC',
+        'rate': 0.025,
+        'cost': 0.05
+    })
     mocker.patch('freqtrade.exchange._API', api_mock)
     assert get_fee() == 0.025
 
diff --git a/freqtrade/tests/test_main.py b/freqtrade/tests/test_main.py
index 5bd170a5c..7dc54e567 100644
--- a/freqtrade/tests/test_main.py
+++ b/freqtrade/tests/test_main.py
@@ -1,7 +1,6 @@
 # pragma pylint: disable=missing-docstring, C0103
 import copy
 import logging
-import ccxt
 from unittest.mock import MagicMock
 
 import arrow
@@ -82,7 +81,6 @@ def test_process_trade_creation(default_conf, ticker, limit_buy_order, health, m
     mocker.patch.multiple('freqtrade.main.exchange',
                           validate_pairs=MagicMock(),
                           get_ticker=ticker,
-                          #get_wallet_health=health,
                           buy=MagicMock(return_value='mocked_limit_buy'),
                           get_order=MagicMock(return_value=limit_buy_order))
     init(default_conf, create_engine('sqlite://'))
@@ -113,7 +111,6 @@ def test_process_exchange_failures(default_conf, ticker, health, mocker):
     mocker.patch.multiple('freqtrade.main.exchange',
                           validate_pairs=MagicMock(),
                           get_ticker=ticker,
-                          #get_wallet_health=health,
                           buy=MagicMock(side_effect=requests.exceptions.RequestException))
     init(default_conf, create_engine('sqlite://'))
     result = _process(interval=int(default_conf['ticker_interval']))
@@ -129,7 +126,6 @@ def test_process_operational_exception(default_conf, ticker, health, mocker):
     mocker.patch.multiple('freqtrade.main.exchange',
                           validate_pairs=MagicMock(),
                           get_ticker=ticker,
-                          #get_wallet_health=health,
                           buy=MagicMock(side_effect=OperationalException))
     init(default_conf, create_engine('sqlite://'))
     assert get_state() == State.RUNNING
@@ -147,7 +143,6 @@ def test_process_trade_handling(default_conf, ticker, limit_buy_order, health, m
     mocker.patch.multiple('freqtrade.main.exchange',
                           validate_pairs=MagicMock(),
                           get_ticker=ticker,
-                          #get_wallet_health=health,
                           buy=MagicMock(return_value='mocked_limit_buy'),
                           get_order=MagicMock(return_value=limit_buy_order))
     init(default_conf, create_engine('sqlite://'))