diff --git a/doc/PLUGIN_FEATURE_DISABLES.md b/doc/PLUGIN_FEATURE_DISABLES.md
index 41c87c46a..f82dcd232 100644
--- a/doc/PLUGIN_FEATURE_DISABLES.md
+++ b/doc/PLUGIN_FEATURE_DISABLES.md
@@ -26,6 +26,8 @@ Tags currently in use:
 - `@feature:username`
 - `@feature:clear-authorship`
 - `@feature:error-gritter`
+- `@feature:line-numbers`
+- `@feature:rtl-toggle`
 
 ### 2. A plugin declares the features it disables in its `ep.json`
 
diff --git a/src/tests/frontend-new/specs/chat.spec.ts b/src/tests/frontend-new/specs/chat.spec.ts
index bf3e2f382..bdabd4932 100644
--- a/src/tests/frontend-new/specs/chat.spec.ts
+++ b/src/tests/frontend-new/specs/chat.spec.ts
@@ -150,7 +150,12 @@ test('chat icon click reveals chatbox after a disable → enable cycle', {
 
 // Title-bar layout / glyph regressions from #7590 review.
 test('chat title bar lays out as a centred flex row with underscore minimize', {
-  tag: '@feature:chat',
+  // `@feature:rtl-toggle` because the symmetric leftGap/rightGap
+  // assertion is only valid in LTR — the colibris #titlebar padding
+  // rule ships a one-sided pad that flips under `body[dir=rtl]`,
+  // throwing the gap apart by ~170px. A plugin that forces RTL on
+  // (e.g. ep_right_to_left) declares this in its disables list.
+  tag: ['@feature:chat', '@feature:rtl-toggle'],
 }, async ({page}) => {
   await showChat(page);
 
diff --git a/src/tests/frontend-new/specs/rtl_url_param.spec.ts b/src/tests/frontend-new/specs/rtl_url_param.spec.ts
index a279dc6e4..f094da101 100644
--- a/src/tests/frontend-new/specs/rtl_url_param.spec.ts
+++ b/src/tests/frontend-new/specs/rtl_url_param.spec.ts
@@ -13,7 +13,7 @@ test.describe('RTL URL parameter', function () {
     await expect(page.locator('#options-rtlcheck')).toBeChecked();
   });
 
-  test('rtl=false disables RTL mode after rtl=true', async function ({page}) {
+  test('rtl=false disables RTL mode after rtl=true', {tag: '@feature:rtl-toggle'}, async function ({page}) {
     // First enable RTL via URL
     await appendQueryParams(page, {rtl: 'true'});
     await expect(page.locator('#options-rtlcheck')).toBeChecked();
@@ -23,7 +23,7 @@ test.describe('RTL URL parameter', function () {
     await expect(page.locator('#options-rtlcheck')).not.toBeChecked();
   });
 
-  test('no rtl param falls back to the pad setting after an RTL URL override', async function ({page}) {
+  test('no rtl param falls back to the pad setting after an RTL URL override', {tag: '@feature:rtl-toggle'}, async function ({page}) {
     // Enable RTL via URL for the current page load only
     await appendQueryParams(page, {rtl: 'true'});
     await expect(page.locator('#options-rtlcheck')).toBeChecked();