diff --git a/test/test_geometry_rect.py b/test/test_geometry_rect.py
new file mode 100644
index 0000000..39c4219
--- /dev/null
+++ b/test/test_geometry_rect.py
@@ -0,0 +1,18 @@
+# Eryn Wells <eryn@erynwells.me>
+
+from erynrl.geometry import Point, Rect, Size
+
+
+def test_rect_corners():
+    rect = Rect(Point(5, 5), Size(5, 5))
+
+    corners = set(rect.corners)
+
+    expected_corners = set([
+        Point(5, 5),
+        Point(9, 5),
+        Point(5, 9),
+        Point(9, 9)
+    ])
+
+    assert corners == expected_corners