diff --git a/src/chunk_group.rs b/src/chunk_group.rs
index 3864742..32b6c18 100644
--- a/src/chunk_group.rs
+++ b/src/chunk_group.rs
@@ -440,15 +440,19 @@ fn update_test() {
     let (dirty_render_rects_send, _) = async_channel::unbounded::<DeferredDirtyRectUpdate>();
     let dirty_render_rect_send = &dirty_render_rects_send;
 
+    for (y_toff, x_toff) in rand_range(0..2)
+        .into_iter()
+        .cartesian_product(rand_range(0..2).into_iter())
+    {
 
-        update_chunk_groups(
-            &mut chunk_manager.chunks,
-            (0, 0),
-            &dirty_rects,
-            manager_pos,
-            (dirty_update_rect_send, dirty_render_rect_send),
-            (dt, materials),
-
-        );
+            update_chunk_groups(
+                &mut chunk_manager.chunks,
+                (x_toff, y_toff),
+                &dirty_rects,
+                manager_pos,
+                (dirty_update_rect_send, dirty_render_rect_send),
+                (dt, materials),
+            );
 
+    }
 }