diff --git a/tests/persistence/test_db_context.py b/tests/persistence/test_db_context.py
index 67dcd10bb..690006219 100644
--- a/tests/persistence/test_db_context.py
+++ b/tests/persistence/test_db_context.py
@@ -5,6 +5,7 @@ from freqtrade.persistence import FtNoDBContext, PairLocks, Trade
 
 @pytest.mark.parametrize('timeframe', ['', '5m', '1d'])
 def test_FtNoDBContext(timeframe):
+    PairLocks.timeframe = ''
     assert Trade.use_db is True
     assert PairLocks.use_db is True
     assert PairLocks.timeframe == ''