diff --git a/tests/interactive/test-text-field.c b/tests/interactive/test-text-field.c
index 0b41d06f2..f17388f8a 100644
--- a/tests/interactive/test-text-field.c
+++ b/tests/interactive/test-text-field.c
@@ -12,8 +12,8 @@ on_entry_paint (ClutterActor *actor,
   gfloat width, height;
 
   clutter_actor_get_allocation_box (actor, &allocation);
-  width = allocation.x2 - allocation.x1;
-  height = allocation.y2 - allocation.y1;
+  clutter_actor_box_clamp_to_pixel (&allocation);
+  clutter_actor_box_get_size (&allocation, &width, &height);
 
   cogl_set_source_color4ub (255, 255, 255, 255);
   cogl_path_round_rectangle (0, 0, width, height, 4.0, 1.0);