diff --git a/web/src/modules/wiki/Tree.test.tsx b/web/src/modules/wiki/Tree.test.tsx
index 390d876..1168bf9 100644
--- a/web/src/modules/wiki/Tree.test.tsx
+++ b/web/src/modules/wiki/Tree.test.tsx
@@ -1,5 +1,7 @@
 import { render, screen } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
 import { describe, expect, it, vi } from "vitest";
 import type { WikiNode } from "./api/queries.ts";
 import { Tree } from "./Tree.tsx";
@@ -85,3 +87,11 @@ describe("Tree", () => {
     expect(item("B")).toHaveAttribute("aria-expanded", "true");
   });
 });
+
+describe("дерево: многострочные названия (#133)", () => {
+  it("строка дерева не сжимается в переполненной колонке — перенесённый текст не налезает на соседей", () => {
+    const css = readFileSync(resolve(__dirname, "wiki.css"), "utf8");
+    const rule = css.match(/\.wiki-tree__item\{[^}]*\}/)?.[0] ?? "";
+    expect(rule).toMatch(/flex:none|flex-shrink:0/);
+  });
+});
diff --git a/web/src/modules/wiki/wiki.css b/web/src/modules/wiki/wiki.css
index e80ab72..308d0c9 100644
--- a/web/src/modules/wiki/wiki.css
+++ b/web/src/modules/wiki/wiki.css
@@ -12,7 +12,7 @@
 
 /* дерево */
 .wiki-tree{display:flex;flex-direction:column;gap:var(--space-1);max-height:70vh;overflow:auto}
-.wiki-tree__item{display:flex;align-items:center;gap:var(--space-1);min-height:var(--control-h);padding-inline-end:var(--space-2);border-radius:var(--radius-md);
+.wiki-tree__item{flex:none;display:flex;align-items:center;gap:var(--space-1);min-height:var(--control-h);padding-inline-end:var(--space-2);border-radius:var(--radius-md);
   font-size:var(--fs-body);line-height:var(--lh-body);color:var(--color-text-primary);cursor:pointer}
 .wiki-tree__item:hover{background:var(--color-bg-hover)}
 .wiki-tree__item.is-selected{background:var(--color-bg-selected);color:var(--color-action-primary);font-weight:600}