diff --git a/tf_pwa/model/model.py b/tf_pwa/model/model.py
index fe69c06..c9cf04d 100644
--- a/tf_pwa/model/model.py
+++ b/tf_pwa/model/model.py
@@ -327,7 +327,9 @@ def nll(self, data, mcdata):
         amp_s2 = self.signal(data) * weight
         amp_s2 = self.sum_resolution(amp_s2)
         weight = tf.reduce_sum(rw, axis=-1)
-        dom_weight = tf.where(weight == 0, tf.constant(1.0, dtype=weight.dtype), weight)
+        dom_weight = tf.where(
+            weight == 0, tf.constant(1.0, dtype=weight.dtype), weight
+        )
         ln_data = clip_log(amp_s2 / dom_weight)
         mc_weight = mcdata.get("weight", tf.ones((data_shape(mcdata),)))
         int_mc = tf.reduce_sum(