--- /dev/null
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+use X11::XCB qw(:all);
+use Time::HiRes qw(sleep);
+use i3test tests => 5;
+
+BEGIN {
+ use_ok('X11::XCB::Window');
+}
+
+my $x = X11::XCB::Connection->new;
+
+my $tmp = get_unused_workspace;
+cmd "workspace $tmp";
+
+my $left = open_standard_window($x);
+sleep 0.25;
+my $mid = open_standard_window($x);
+sleep 0.25;
+
+cmd 'split v';
+my $bottom = open_standard_window($x);
+sleep 0.25;
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+#############################################################################
+# 1: open a floating window, get it mapped
+#############################################################################
+
+my $x = X11::XCB::Connection->new;
+
+# Create a floating window
+my $window = $x->root->create_child(
+ class => WINDOW_CLASS_INPUT_OUTPUT,
+ rect => [ 0, 0, 30, 30],
+ background_color => '#C0C0C0',
+ # replace the type with 'utility' as soon as the coercion works again in X11::XCB
+ window_type => $x->atom(name => '_NET_WM_WINDOW_TYPE_UTILITY'),
+);
+
+isa_ok($window, 'X11::XCB::Window');
+
+$window->map;
+
+sleep 0.25;
+
+ok($window->mapped, 'Window is mapped');
+
+($nodes, $focus) = get_ws_content($tmp);
+is(@{$nodes->[1]->{nodes}}, 2, 'two windows in split con');
+
+#############################################################################
+# 2: make it tiling, see where it ends up
+#############################################################################
+
+cmd 'mode toggle';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+is(@{$nodes->[1]->{nodes}}, 3, 'three windows in split con after mode toggle');