diff --git a/tests/test_model/test_reftek/test_reftek_helper.py b/tests/test_model/test_reftek/test_reftek_helper.py
index 2ab5ffe1aedff03bcfe44a9055ddf1acbea891c2..7fe0e02e523f935ac98a63b89bfcd5454960cfe6 100644
--- a/tests/test_model/test_reftek/test_reftek_helper.py
+++ b/tests/test_model/test_reftek/test_reftek_helper.py
@@ -16,9 +16,7 @@ from sohstationviewer.model.reftek_data.reftek_reader.packets import (
     EHETPacket, DTPacket,
 )
 from sohstationviewer.model.reftek_data.reftek_reader.reftek_reader_helper \
-    import (
-    read_rt130_file, convert_packet_to_obspy_format,
-)
+    import (read_rt130_file, convert_packet_to_obspy_format)
 
 unpacker = Unpacker('>')