diff --git a/docs/releases/development.rst b/docs/releases/development.rst
index a7c16b3a..84bb27a0 100644
--- a/docs/releases/development.rst
+++ b/docs/releases/development.rst
@@ -4,7 +4,7 @@ Next release (in development)
 
 * Reduce memory allocations when constructing polygons.
   This should allow opening even larger datasets
-  (:pr:`200`).
+  (:pr:`200`, :pr:`207`).
 * Add support for Python 3.14 and drop support for Python 3.11,
   following `SPEC-0 <https://scientific-python.org/specs/spec-0000/>`_.
   (:pr:`201`).
diff --git a/tests/conventions/test_cfgrid1d.py b/tests/conventions/test_cfgrid1d.py
index ac02beb5..3e073f83 100644
--- a/tests/conventions/test_cfgrid1d.py
+++ b/tests/conventions/test_cfgrid1d.py
@@ -499,6 +499,7 @@ def test_topology():
         0.1 * numpy.array([[i - 0.5, i + 0.5] for i in range(11)]))
 
 
+@pytest.mark.memory_usage
 def test_make_polygon_memory_usage() -> None:
     width, height = 2000, 1000
     dataset = make_dataset(width=width, height=height)
diff --git a/tests/conventions/test_cfgrid2d.py b/tests/conventions/test_cfgrid2d.py
index 5b22b654..a2d29e16 100644
--- a/tests/conventions/test_cfgrid2d.py
+++ b/tests/conventions/test_cfgrid2d.py
@@ -494,6 +494,7 @@ def test_plot_on_figure() -> None:
     assert len(figure.axes) == 2
 
 
+@pytest.mark.memory_usage
 def test_make_polygon_memory_usage() -> None:
     j_size, i_size = 1000, 2000
     dataset = make_dataset(j_size=j_size, i_size=i_size)