diff --git a/qlinks/model/spin1_xy_model_1d.py b/qlinks/model/spin1_xy_model_1d.py
index 1b5805c..bd28b13 100644
--- a/qlinks/model/spin1_xy_model_1d.py
+++ b/qlinks/model/spin1_xy_model_1d.py
@@ -68,10 +68,10 @@ def _build_h3_term(self):
         for site in range(self.n):
             self._hamiltonian += 0.5 * self.coup_j3 * kron(
                 [s_plus, idty, idty, s_minus, *[idty] * (self.n - 4)], shift=site
-            )
+            )  # fmt: skip
             self._hamiltonian += 0.5 * self.coup_j3 * kron(
                 [s_minus, idty, idty, s_plus, *[idty] * (self.n - 4)], shift=site
-            )
+            )  # fmt: skip
             if not self.periodic and site == self.n - 4:
                 break