diff --git a/test/fixtures/page_generation/page.py b/test/fixtures/page_generation/page.py
index 3a15d3d..56a229c 100644
--- a/test/fixtures/page_generation/page.py
+++ b/test/fixtures/page_generation/page.py
@@ -1199,6 +1199,10 @@ class PagePartitioner(abc.ABC):
     def generate_content_boxes(self, box: Rectangle, depth=0):
         raise NotImplementedError
 
+    @abc.abstractmethod
+    def generate_child_boxes(self, box: Rectangle) -> Tuple[Rectangle, Rectangle]:
+        pass
+
     def recurse(self, depth):
         return random.random() <= self.recursion_probability(depth)
 
@@ -1214,20 +1218,19 @@ class RandomPagePartitioner(PagePartitioner):
         if depth >= self.max_recursion_depth:
             yield box
         else:
-            child_boxes = generate_random_child_boxes(box, self.recursive_margin_percentage)
+            child_boxes = self.generate_child_boxes(box)
             if self.recurse(depth):
                 yield from (self.generate_content_boxes(b, depth + 1) for b in child_boxes)
             else:
                 yield child_boxes
 
+    def generate_child_boxes(self, box: Rectangle) -> Tuple[Rectangle, Rectangle]:
+        axis = random.choice(["x", "y"])
 
-def generate_random_child_boxes(box: Rectangle, margin_percentage) -> Tuple[Rectangle, Rectangle]:
-    axis = random.choice(["x", "y"])
-
-    edge_anchor_point, edge_length = (box.x1, box.width) if axis == "x" else (box.y1, box.height)
-    split_coordinate = random.uniform(0.3, 0.7) * edge_length + edge_anchor_point
-    child_boxes = get_child_boxes(box, split_coordinate, axis, margin_percentage)
-    return child_boxes
+        edge_anchor_point, edge_length = (box.x1, box.width) if axis == "x" else (box.y1, box.height)
+        split_coordinate = random.uniform(0.3, 0.7) * edge_length + edge_anchor_point
+        child_boxes = get_child_boxes(box, split_coordinate, axis, self.recursive_margin_percentage)
+        return child_boxes
 
 
 def get_child_boxes(box: Rectangle, split_coordinate, axis, margin_percentage) -> Tuple[Rectangle, Rectangle]: