diff --git a/src/polygon_hull.scad b/src/polygon_hull.scad
index ceed93dd..300ef892 100644
--- a/src/polygon_hull.scad
+++ b/src/polygon_hull.scad
@@ -11,5 +11,11 @@
 use <__comm__/_convex_hull2.scad>;
 
 module polygon_hull(points) {
-    polygon(_convex_hull2(points));
+    poly = _convex_hull2(points);
+    polygon(poly);
+    test_convex_hull2(poly);
+}
+
+module test_convex_hull2(poly) {
+
 }
\ No newline at end of file
diff --git a/test/test_all.scad b/test/test_all.scad
index 2328c6a3..5f5f0971 100644
--- a/test/test_all.scad
+++ b/test/test_all.scad
@@ -2,6 +2,7 @@
 include <test_rounded_square.scad>;
 include <test_line2d.scad>;
 include <test_hexagons.scad>;
+include <test_polygon_hull.scad>;
 
 // 3D
 include <test_rounded_cube.scad>;
diff --git a/test/test_polygon_hull.scad b/test/test_polygon_hull.scad
new file mode 100644
index 00000000..b8a7b539
--- /dev/null
+++ b/test/test_polygon_hull.scad
@@ -0,0 +1,19 @@
+include <polygon_hull.scad>;
+
+module test_polygon_hull() {
+    echo("==== test_polygon_hull ====");
+    polygon_hull([
+        [1, 1],
+        [1, 0],
+        [0, 1],
+        [-2, 1],
+        [-1, -1]
+    ]);
+}
+
+
+module test_convex_hull2(poly) {
+    assert(poly == [[-2, 1], [-1, -1], [1, 0], [1, 1]]);
+}
+
+test_polygon_hull();
\ No newline at end of file