diff --git a/freqtrade/optimize/__init__.py b/freqtrade/optimize/__init__.py
index 10043bf4d..58eb28cb1 100644
--- a/freqtrade/optimize/__init__.py
+++ b/freqtrade/optimize/__init__.py
@@ -122,7 +122,10 @@ def download_pairs(datadir, pairs: List[str],
     """For each pairs passed in parameters, download the ticker intervals"""
     for pair in pairs:
         try:
-            download_backtesting_testdata(datadir, pair=pair, interval=ticker_interval, timerange=timerange)
+            download_backtesting_testdata(datadir,
+                                          pair=pair,
+                                          interval=ticker_interval,
+                                          timerange=timerange)
         except BaseException:
             logger.info(
                 'Failed to download the pair: "%s", Interval: %s',
@@ -139,7 +142,7 @@ def get_start_ts_from_timerange(timerange: Tuple[Tuple, int, int], interval: str
 
     if timerange[0][0] == 'date':
         return timerange[1] * 1000
-    
+
     if timerange[0][1] == 'line':
         num_minutes = timerange[2] * Constants.TICKER_INTERVAL_MINUTES[interval]
         return arrow.utcnow().shift(minutes=num_minutes).timestamp * 1000
@@ -156,7 +159,7 @@ def download_backtesting_testdata(datadir: str,
     Download the latest ticker intervals from the exchange for the pairs passed in parameters
     Based on @Rybolov work: https://github.com/rybolov/freqtrade-data
     :param pairs: list of pairs to download
-    :param interval: ticker interval 
+    :param interval: ticker interval
     :param timerange: range of time to download
     :return: bool
     """
diff --git a/freqtrade/tests/optimize/test_optimize.py b/freqtrade/tests/optimize/test_optimize.py
index a488f320e..e58f5bb2d 100644
--- a/freqtrade/tests/optimize/test_optimize.py
+++ b/freqtrade/tests/optimize/test_optimize.py
@@ -167,7 +167,7 @@ def test_get_start_ts_from_timerange(mocker) -> None:
 
     start = get_start_ts_from_timerange(((None, 'line'), None, -200), '5m')
     assert start == (1367900664 - 5 * 200 * 60) * 1000
-    
+
 
 def test_download_pairs_exception(ticker_history, mocker, caplog) -> None:
     mocker.patch('freqtrade.optimize.__init__.get_ticker_history', return_value=ticker_history)
diff --git a/freqtrade/tests/test_arguments.py b/freqtrade/tests/test_arguments.py
index e28aa010f..756f48778 100644
--- a/freqtrade/tests/test_arguments.py
+++ b/freqtrade/tests/test_arguments.py
@@ -93,7 +93,8 @@ def test_parse_timerange_incorrect() -> None:
 
     assert (('date', None), 1274486400, None) == Arguments.parse_timerange('20100522-')
     assert ((None, 'date'), None, 1274486400) == Arguments.parse_timerange('-20100522')
-    assert (('date', 'date'), 1274486400, 1438214400) == Arguments.parse_timerange('20100522-20150730')
+    timerange = Arguments.parse_timerange('20100522-20150730')
+    assert timerange == (('date', 'date'), 1274486400, 1438214400)
 
     with pytest.raises(Exception, match=r'Incorrect syntax.*'):
         Arguments.parse_timerange('-')
diff --git a/scripts/download_backtest_data.py b/scripts/download_backtest_data.py
index 3878f6a34..472442efb 100755
--- a/scripts/download_backtest_data.py
+++ b/scripts/download_backtest_data.py
@@ -47,7 +47,7 @@ for pair in PAIRS:
         if not data:
             print('\tNo data was downloaded')
             break
-            
+
         print('\tData was downloaded for period %s - %s' % (
             arrow.get(data[0][0] / 1000).format(),
             arrow.get(data[-1][0] / 1000).format()))