diff --git a/tests/instruments/test_drifters.py b/tests/instruments/test_drifters.py
index 0af64143..dafbb934 100644
--- a/tests/instruments/test_drifters.py
+++ b/tests/instruments/test_drifters.py
@@ -1,11 +1,13 @@
 """Test the simulation of drifters."""
 
-from virtual_ship.instruments.drifter import simulate_drifters, Drifter
-from virtual_ship.instruments import Location
-from parcels import FieldSet
-import numpy as np
 from datetime import timedelta
 
+import numpy as np
+from parcels import FieldSet
+
+from virtual_ship.instruments import Location
+from virtual_ship.instruments.drifter import Drifter, simulate_drifters
+
 
 def test_simulate_drifters() -> None:
     fieldset = FieldSet.from_data(