diff --git a/resources/tester/helper_346_1_pipeline_page.cjs b/resources/tester/helper_346_1_pipeline_page.cjs
index 09ad8904d..ab9a7dc42 100644
--- a/resources/tester/helper_346_1_pipeline_page.cjs
+++ b/resources/tester/helper_346_1_pipeline_page.cjs
@@ -266,6 +266,15 @@ async function run() {
       canUndo: () => true,
       canRedo: () => false,
       isDirty: () => dirty,
+      // 다리는 처음 ≠ 지금 노선일 때만 초안(445-2 `lineChanged`) — 가짜도 처음 · 지금을 다르게 둠
+      current: () => fake.undo(),
+      first: () => ({
+        ...fake.undo(),
+        planned: [
+          [0, 0],
+          [9, 9],
+        ],
+      }),
     };
     const bridge = {
       edited: (d) => told.push(d && d.nodes.length),