diff --git a/src/views/rules/__tests__/rules.test.tsx b/src/views/rules/__tests__/rules.test.tsx
new file mode 100644
index 00000000..1a685bca
--- /dev/null
+++ b/src/views/rules/__tests__/rules.test.tsx
@@ -0,0 +1,124 @@
+import * as React from 'react';
+import { createElement } from 'react';
+import { createRoot, type Root } from 'react-dom/client';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import Rules from '../rules';
+
+(globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
+const act = (React as { act?: (cb: () => void | Promise<void>) => void | Promise<void> }).act as (cb: () => void | Promise<void>) => void | Promise<void>;
+
+const testState = vi.hoisted(() => ({
+  boardIdentifier: undefined as string | undefined,
+  communities: {} as Record<string, { rules?: string[]; shortAddress?: string; state?: string; title?: string }>,
+  directories: [
+    { address: 'anime-posting.eth', title: '/a/ - Anime & Manga' },
+    { address: 'random-posting.eth', title: '/b/ - Random' },
+  ] as Array<{ address: string; title?: string }>,
+  navigateMock: vi.fn(),
+}));
+
+vi.mock('react-i18next', () => ({
+  useTranslation: () => ({
+    t: (key: string) => key,
+  }),
+}));
+
+vi.mock('react-router-dom', async () => {
+  const actual = await vi.importActual<typeof import('react-router-dom')>('react-router-dom');
+  return {
+    ...actual,
+    useNavigate: () => testState.navigateMock,
+    useParams: () => ({
+      boardIdentifier: testState.boardIdentifier,
+    }),
+  };
+});
+
+vi.mock('@bitsocialnet/bitsocial-react-hooks', () => ({
+  useCommunity: ({ communityAddress }: { communityAddress?: string }) => (communityAddress ? testState.communities[communityAddress] : undefined),
+}));
+
+vi.mock('../../../hooks/use-directories', async () => {
+  const actual = await vi.importActual<typeof import('../../../hooks/use-directories')>('../../../hooks/use-directories');
+  return {
+    ...actual,
+    useDirectories: () => testState.directories,
+  };
+});
+
+vi.mock('../../home', () => ({
+  Footer: () => createElement('div', { 'data-testid': 'footer' }, 'footer'),
+  HomeLogo: () => createElement('div', { 'data-testid': 'home-logo' }, 'home-logo'),
+}));
+
+vi.mock('../../../components/markdown', () => ({
+  default: ({ content }: { content: string }) => createElement('div', { 'data-testid': 'markdown' }, content),
+}));
+
+let container: HTMLDivElement;
+let root: Root;
+
+const renderRules = async () => {
+  await act(async () => {
+    root.render(createElement(Rules));
+  });
+};
+
+describe('Rules', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    testState.boardIdentifier = undefined;
+    testState.communities = {};
+    testState.directories = [
+      { address: 'anime-posting.eth', title: '/a/ - Anime & Manga' },
+      { address: 'random-posting.eth', title: '/b/ - Random' },
+    ];
+    window.scrollTo = vi.fn();
+
+    container = document.createElement('div');
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(() => {
+    act(() => root.unmount());
+    container.remove();
+  });
+
+  it('keeps custom-address routes out of the default board select', async () => {
+    testState.boardIdentifier = 'custom-board.eth';
+    testState.communities = {
+      'custom-board.eth': {
+        rules: ['No custom options in the select.'],
+        shortAddress: 'custom-board.eth',
+        state: 'succeeded',
+      },
+    };
+
+    await renderRules();
+
+    const select = container.querySelector('select');
+    expect(select).toBeTruthy();
+    expect(select?.value).toBe('');
+    expect(Array.from(select?.options ?? []).map((option) => option.value)).toEqual(['', 'anime-posting.eth', 'random-posting.eth']);
+    expect(container.textContent).toContain('Rules for: custom-board.eth');
+  });
+
+  it('keeps the canonical default board selected for known directories', async () => {
+    testState.boardIdentifier = 'a';
+    testState.communities = {
+      'anime-posting.eth': {
+        rules: ['Stay on topic.'],
+        state: 'succeeded',
+      },
+    };
+
+    await renderRules();
+
+    const select = container.querySelector('select');
+    expect(select).toBeTruthy();
+    expect(select?.value).toBe('anime-posting.eth');
+    expect(Array.from(select?.options ?? []).map((option) => option.value)).toEqual(['', 'anime-posting.eth', 'random-posting.eth']);
+    expect(container.textContent).toContain('Rules for: /a/ - Anime & Manga');
+  });
+});
diff --git a/src/views/rules/rules.tsx b/src/views/rules/rules.tsx
index e12cc4eb..9cded9fc 100644
--- a/src/views/rules/rules.tsx
+++ b/src/views/rules/rules.tsx
@@ -2,7 +2,7 @@ import { useEffect, useState, FormEvent } from 'react';
 import { useNavigate, useParams } from 'react-router-dom';
 import { useCommunity } from '@bitsocialnet/bitsocial-react-hooks';
 import { Footer, HomeLogo } from '../home';
-import { useDirectories, DirectoryCommunity } from '../../hooks/use-directories';
+import { useDirectories, DirectoryCommunity, findDirectoryByAddress } from '../../hooks/use-directories';
 import { getSubplebbitAddress, getBoardPath } from '../../lib/utils/route-utils';
 import Markdown from '../../components/markdown';
 import styles from './rules.module.css';
@@ -103,6 +103,8 @@ const BoardSelector = ({
   onSelect: (address: string) => void;
 }) => {
   const [customAddress, setCustomAddress] = useState('');
+  const selectedDefaultBoard = findDirectoryByAddress(directories, selectedAddress);
+  const selectedBoardValue = selectedDefaultBoard?.address ?? '';
 
   const handleSelectChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
     const value = e.target.value;
@@ -129,7 +131,7 @@ const BoardSelector = ({
       </div>
       <div className={styles.boxContent}>
         <div className={styles.selectorRow}>
-          <select value={selectedAddress} onChange={handleSelectChange} className={styles.boardSelect}>
+          <select value={selectedBoardValue} onChange={handleSelectChange} className={styles.boardSelect}>
             <option value=''>Select board...</option>
             {[...directories]
               .sort((a, b) => getBoardShortCode(a.title).localeCompare(getBoardShortCode(b.title)))
@@ -142,7 +144,6 @@ const BoardSelector = ({
                   </option>
                 );
               })}
-            {selectedAddress && !directories.some((sub) => sub.address === selectedAddress) && <option value={selectedAddress}>{selectedAddress}</option>}
           </select>
           <span className={styles.orSeparator}>or</span>
           <form onSubmit={handleCustomSubmit} className={styles.customAddressForm}>