diff --git a/freqtrade/tests/exchange/test_exchange_bittrex.py b/freqtrade/tests/exchange/test_exchange_bittrex.py
index e01e7fa02..35d242b55 100644
--- a/freqtrade/tests/exchange/test_exchange_bittrex.py
+++ b/freqtrade/tests/exchange/test_exchange_bittrex.py
@@ -335,3 +335,8 @@ def test_validate_response_min_trade_requirement_not_met():
     }
     with pytest.raises(ContentDecodingError, match=r'.*MIN_TRADE_REQUIREMENT_NOT_MET.*'):
         Bittrex._validate_response(response)
+
+
+def test_custom_requests(mocker):
+    mocker.patch('freqtrade.exchange.bittrex.requests', MagicMock())
+    btx.custom_requests('http://', '')