diff --git a/tests/conftest.py b/tests/conftest.py
index 8b1b4e16d..79b39b48a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -109,7 +109,6 @@ def si_phonopy_atoms() -> Any:
         cell=lattice,
         scaled_positions=coords,
         symbols=species,
-        pbc=True,
     )