diff --git a/freqtrade/exchange/__init__.py b/freqtrade/exchange/__init__.py
index bcb539996..fbc84c9b9 100644
--- a/freqtrade/exchange/__init__.py
+++ b/freqtrade/exchange/__init__.py
@@ -410,7 +410,7 @@ class Exchange(object):
         logger.info("downloaded %s with length %s.", pair, len(data))
         return data
 
-    def refresh_tickers(self, pair_list: List[str], ticker_interval: str) -> bool:
+    def refresh_tickers(self, pair_list: List[str], ticker_interval: str) -> None:
         """
         Refresh tickers asyncronously and return the result.
         """
@@ -418,8 +418,6 @@ class Exchange(object):
         asyncio.get_event_loop().run_until_complete(
             self.async_get_candles_history(pair_list, ticker_interval))
 
-        return True
-
     async def async_get_candles_history(self, pairs: List[str],
                                         tick_interval: str) -> List[Tuple[str, List]]:
         """Download ohlcv history for pair-list asyncronously """
diff --git a/freqtrade/tests/exchange/test_exchange.py b/freqtrade/tests/exchange/test_exchange.py
index f752da0a3..3c90f425c 100644
--- a/freqtrade/tests/exchange/test_exchange.py
+++ b/freqtrade/tests/exchange/test_exchange.py
@@ -581,10 +581,10 @@ def test_get_history(default_conf, mocker, caplog):
     ]
     pair = 'ETH/BTC'
 
-    async def mock_cacndle_hist(pair, tick_interval, since_ms):
+    async def mock_candle_hist(pair, tick_interval, since_ms):
         return pair, tick
 
-    exchange._async_get_candle_history = Mock(wraps=mock_cacndle_hist)
+    exchange._async_get_candle_history = Mock(wraps=mock_candle_hist)
     # one_call calculation * 1.8 should do 2 calls
     since = 5 * 60 * 500 * 1.8
     print(f"since = {since}")
diff --git a/freqtrade/tests/test_freqtradebot.py b/freqtrade/tests/test_freqtradebot.py
index 6971ec0dd..5e982f11a 100644
--- a/freqtrade/tests/test_freqtradebot.py
+++ b/freqtrade/tests/test_freqtradebot.py
@@ -43,7 +43,7 @@ def patch_get_signal(freqtrade: FreqtradeBot, value=(True, False)) -> None:
     :return: None
     """
     freqtrade.strategy.get_signal = lambda e, s, t: value
-    freqtrade.exchange.refresh_tickers = lambda p, i: True
+    freqtrade.exchange.refresh_tickers = lambda p, i: None
 
 
 def patch_RPCManager(mocker) -> MagicMock: