Fix test regression again.

Author: shyuep

src/pymatgen/core/lattice.py

@@ -73,7 +73,7 @@ def __init__(
         self._lll_matrix_mappings: dict[float, tuple[np.ndarray, np.ndarray]] = {}
         self._lll_inverse = None
 
-        self._pbc = tuple(bool(item) for item in pbc)
+        self.pbc = pbc
 
     @property
     def pbc(self) -> tuple[bool, bool, bool]:
@@ -84,7 +84,7 @@ def pbc(self) -> tuple[bool, bool, bool]:
     def pbc(self, pbc: tuple[bool, bool, bool]) -> None:
         if len(pbc) != 3 or any(item not in {True, False} for item in pbc):
             raise ValueError(f"pbc must be a tuple of three True/False values, got {pbc}")
-            self._pbc = tuple(bool(item) for item in pbc)
+        self._pbc = tuple(bool(item) for item in pbc)
 
     def __repr__(self) -> str:
         return "\n".join(