diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index 2bd84942d..ff8383997 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -1695,7 +1695,7 @@ def test_refresh_latest_ohlcv(mocker, default_conf, caplog) -> None:
     exchange._api_async.fetch_ohlcv.reset_mock()
     caplog.clear()
     # Call with invalid timeframe
-    res = exchange.refresh_latest_ohlcv([('IOTA/ETH', '3m')],cache=False)
+    res = exchange.refresh_latest_ohlcv([('IOTA/ETH', '3m')], cache=False)
     assert not res
     assert len(res) == 0
     assert log_has_re(r'Cannot download \(IOTA\/ETH, 3m\).*', caplog)