diff --git a/tests/test_summary_restarts.py b/tests/test_summary_restarts.py
index 2c13276f..9c98c01c 100644
--- a/tests/test_summary_restarts.py
+++ b/tests/test_summary_restarts.py
@@ -91,9 +91,7 @@ def test_summary_restarts(
         )
 
 
-def run_reservoir_simulator(
-    simulator: str, eclipse_version: str, datafile: str
-) -> None:
+def run_reservoir_simulator(eclipse_version: str, datafile: str) -> None:
     command = ["runeclipse", "-i", "-v", eclipse_version, datafile]
     result = subprocess.run(  # pylint: disable=subprocess-run-check
         command,