diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
index bc84d95a1..16c4e1ee9 100644
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -1099,40 +1099,6 @@ pub(crate) mod test_window {
     pub fn panel_rect(h: &Harness<'static, Window>, id: &str) -> egui::Rect {
         egui::containers::panel::PanelState::load(&h.ctx, egui::Id::new(id)).map(|s| s.outer_rect).unwrap()
     }
-}
-
-/// The whole window in a headless test harness, at a chosen window size.
-#[cfg(test)]
-pub(crate) mod test_window {
-    use egui_kittest::Harness;
-
-    pub struct Window {
-        pub app: crate::DesignApp,
-        ready: bool,
-    }
-
-    /// The window at `size` with a new document open.
-    pub fn open(mut app: crate::DesignApp, size: egui::Vec2) -> Harness<'static, Window> {
-        if app.session.active().is_none() {
-            app.run("file.new", serde_json::json!({})).unwrap();
-        }
-        let mut h = Harness::builder().with_size(size).with_max_steps(1000).build_ui_state(
-            |ui, w: &mut Window| {
-                // The builder runs a frame before the texture size can be raised: skip it.
-                if !w.ready {
-                    return;
-                }
-                let ctx = ui.ctx().clone();
-                w.app.logic(&ctx);
-                w.app.ui(ui);
-            },
-            Window { app, ready: false },
-        );
-        h.input_mut().max_texture_side = Some(8192);
-        h.state_mut().ready = true;
-        h.run_steps(6);
-        h
-    }
 
     /// A primary click at `pos`, then a few frames.
     pub fn click_at(h: &mut Harness<'static, Window>, pos: egui::Pos2) {