fix lint

Author: amilcarlucas

tests/test_param_pid_adjustment_update.py

@@ -315,10 +315,8 @@ def test_empty_adjustment_file(self) -> None:
             pass
         with pytest.raises(SystemExit) as cm:
             update_pid_adjustment_params(self.test_dir, os.path.basename(self.optimized_param_file), 0.5)
-        assert (
-            cm.value.args[0]
-            == f"Failed to load PID adjustment parameters from {os.path.join('test_directory', '23_optional_pid_adjustment.param')}"
-        )
+        expected_path = os.path.join("test_directory", "23_optional_pid_adjustment.param")
+        assert cm.value.args[0] == f"Failed to load PID adjustment parameters from {expected_path}"
 
     def test_zero_default_value(self) -> None:
         # Set a parameter in the default parameter file to zero