diff --git a/libpysal/graph/tests/__init__.py b/libpysal/graph/tests/__init__.py
new file mode 100644
index 000000000..8b1378917
--- /dev/null
+++ b/libpysal/graph/tests/__init__.py
@@ -0,0 +1 @@
+
diff --git a/libpysal/graph/tests/test_base.py b/libpysal/graph/tests/test_base.py
index b123a97c2..fe53cc73f 100644
--- a/libpysal/graph/tests/test_base.py
+++ b/libpysal/graph/tests/test_base.py
@@ -1436,7 +1436,7 @@ def test_apply(self):
             ),
         )
         pd.testing.assert_series_equal(
-            contig.apply(self.nybb.geometry, lambda x: x.unary_union.convex_hull.area),
+            contig.apply(self.nybb.geometry, lambda x: x.union_all().convex_hull.area),
             expected,
         )