diff --git a/tests/complex/traci/person/setSpeedFactor/runner.py b/tests/complex/traci/person/setSpeedFactor/runner.py
index c270c32c694..b30bdeb2b7f 100755
--- a/tests/complex/traci/person/setSpeedFactor/runner.py
+++ b/tests/complex/traci/person/setSpeedFactor/runner.py
@@ -34,7 +34,7 @@
              ] + sys.argv[1:])
 pID = "p1"
 traci.person.add(pID, "SC", 0, traci.constants.DEPARTFLAG_NOW)
-traci.person.appendWalkingStage(pID, ["SC"], arrivalPos="-20")
+traci.person.appendWalkingStage(pID, ["SC"], arrivalPos=-20)
 
 while traci.simulation.getMinExpectedNumber() > 0: