diff --git a/menelaus/data_drift/stat_test.py b/menelaus/data_drift/stat_test.py
index 2dc1549..5d6fb48 100644
--- a/menelaus/data_drift/stat_test.py
+++ b/menelaus/data_drift/stat_test.py
@@ -63,8 +63,6 @@ def update(self, X, y_true=None, y_pred=None, alt=None):
         """
         if self.drift_state == "drift":
             self.reset()
-            self.reference = self.test
-
         X, _, _ = super()._validate_input(X, None, None)
         X = X.reshape(
             len(X),