diff --git a/src/amulet/resource_pack/abc/resource_pack_manager.py b/src/amulet/resource_pack/abc/resource_pack_manager.py
index ab6516111..a7023ba3c 100644
--- a/src/amulet/resource_pack/abc/resource_pack_manager.py
+++ b/src/amulet/resource_pack/abc/resource_pack_manager.py
@@ -70,11 +70,15 @@ def get_block_model(self, block_stack: BlockStack) -> BlockMesh:
         The block should already be in the resource pack format"""
         if block_stack not in self._cached_models:
             if len(block_stack) == 1:
-                self._cached_models[block_stack] = self._get_model(block_stack.base_block)
+                self._cached_models[block_stack] = self._get_model(
+                    block_stack.base_block
+                )
             else:
                 self._cached_models[block_stack] = BlockMesh.merge(
                     (self._get_model(block_stack.base_block),)
-                    + tuple(self._get_model(block_) for block_ in block_stack.extra_blocks)
+                    + tuple(
+                        self._get_model(block_) for block_ in block_stack.extra_blocks
+                    )
                 )
 
         return copy.deepcopy(self._cached_models[block_stack])