diff --git a/robot/helper_plan_cli_spec.py b/robot/helper_plan_cli_spec.py
index 8961aaa90..1ac27602d 100644
--- a/robot/helper_plan_cli_spec.py
+++ b/robot/helper_plan_cli_spec.py
@@ -246,7 +246,7 @@ def list_columns() -> None:
         return_value=mock_service,
     ):
         # Use a wide terminal so column headers are not truncated
-        wide_runner = CliRunner(mix_stderr=False)
+        wide_runner = CliRunner()
         result = wide_runner.invoke(plan_app, ["list"], env={"COLUMNS": "200"})
         if result.exit_code != 0:
             print(f"FAIL: list returned {result.exit_code}", file=sys.stderr)