diff --git a/testcases/t/04-floating.t b/testcases/t/04-floating.t
index d16fa8b7..de104f2f 100644
--- a/testcases/t/04-floating.t
+++ b/testcases/t/04-floating.t
@@ -54,8 +54,10 @@ sleep(0.25);
 cmp_ok($absolute->{width}, '==', 80, "i3 let the width at 80");
 cmp_ok($absolute->{height}, '==', 90, "i3 let the height at 90");
 
+# We need to compare the position with decorations due to the way
+# we do decoration rendering (on the parent frame) in the tree branch
 cmp_ok($top->{x}, '==', 1, 'i3 mapped it to x=1');
-cmp_ok($top->{y}, '==', 1, 'i3 mapped it to y=1');
+cmp_ok($top->{y}, '==', 18, 'i3 mapped it to y=18');
 
 $window->unmap;