diff --git a/tests/ert/unit_tests/config/test_ert_plugin.py b/tests/ert/unit_tests/config/test_ert_plugin.py
index 6ffaea9ad85..655e431b6ac 100644
--- a/tests/ert/unit_tests/config/test_ert_plugin.py
+++ b/tests/ert/unit_tests/config/test_ert_plugin.py
@@ -151,7 +151,7 @@ def run(self, a, b, c, ensemble):
     )
 
 
-def test_plugin_with_default_arguments(capsys):
+def test_plugin_with_default_arguments():
     class FixturePlugin(ErtPlugin):
         def run(self, ensemble=None):
             return ensemble