diff --git a/metalearners/tlearner.py b/metalearners/tlearner.py
index 875a986..11dacaa 100644
--- a/metalearners/tlearner.py
+++ b/metalearners/tlearner.py
@@ -118,7 +118,6 @@ def evaluate(
     ) -> dict[str, float]:
         safe_scoring = self._scoring(scoring)
 
-
         return _evaluate_model_kind(
             cfes=self._nuisance_models[VARIANT_OUTCOME_MODEL],
             Xs=[X[w == tv] for tv in range(self.n_variants)],
@@ -127,5 +126,5 @@ def evaluate(
             model_kind=VARIANT_OUTCOME_MODEL,
             is_oos=is_oos,
             oos_method=oos_method,
-            is_treatment=False,
+            is_treatment_model=False,
         )