diff --git a/packages/lexical-playground/__tests__/e2e/KeyboardShortcuts.spec.mjs b/packages/lexical-playground/__tests__/e2e/KeyboardShortcuts.spec.mjs
index c3de65f586b..60997995ceb 100644
--- a/packages/lexical-playground/__tests__/e2e/KeyboardShortcuts.spec.mjs
+++ b/packages/lexical-playground/__tests__/e2e/KeyboardShortcuts.spec.mjs
@@ -23,6 +23,7 @@ import {
   selectCharacters,
   toggleBold,
   toggleBulletList,
+  toggleCapitalize,
   toggleChecklist,
   toggleInsertCodeBlock,
   toggleItalic,
@@ -122,6 +123,10 @@ const additionalStylesTestCases = [
     applyShortcut: (page) => toggleUppercase(page),
     style: 'Uppercase',
   },
+  {
+    applyShortcut: (page) => toggleCapitalize(page),
+    style: 'Capitalize',
+  },
   {
     applyShortcut: (page) => toggleStrikethrough(page),
     style: 'Strikethrough',
diff --git a/packages/lexical-playground/__tests__/e2e/TextFormatting.spec.mjs b/packages/lexical-playground/__tests__/e2e/TextFormatting.spec.mjs
index 103d498d90d..b684a3de5c3 100644
--- a/packages/lexical-playground/__tests__/e2e/TextFormatting.spec.mjs
+++ b/packages/lexical-playground/__tests__/e2e/TextFormatting.spec.mjs
@@ -13,6 +13,7 @@ import {
   moveToLineEnd,
   selectCharacters,
   toggleBold,
+  toggleCapitalize,
   toggleItalic,
   toggleLowercase,
   toggleUnderline,
@@ -441,6 +442,11 @@ test.describe.parallel('TextFormatting', () => {
       className: 'PlaygroundEditorTheme__textUppercase',
       format: 'uppercase',
     },
+    {
+      applyCapitalization: toggleCapitalize,
+      className: 'PlaygroundEditorTheme__textCapitalize',
+      format: 'capitalize',
+    },
   ];
 
   capitalizationFormats.forEach(({className, format, applyCapitalization}) => {
diff --git a/packages/lexical-playground/__tests__/keyboardShortcuts/index.mjs b/packages/lexical-playground/__tests__/keyboardShortcuts/index.mjs
index c1592fb4c89..e4bef9db645 100644
--- a/packages/lexical-playground/__tests__/keyboardShortcuts/index.mjs
+++ b/packages/lexical-playground/__tests__/keyboardShortcuts/index.mjs
@@ -277,6 +277,14 @@ export async function toggleUppercase(page) {
   await page.keyboard.up('Shift');
 }
 
+export async function toggleCapitalize(page) {
+  await keyDownCtrlOrMeta(page);
+  await page.keyboard.down('Shift');
+  await page.keyboard.press('3');
+  await keyUpCtrlOrMeta(page);
+  await page.keyboard.up('Shift');
+}
+
 export async function toggleStrikethrough(page) {
   await keyDownCtrlOrMeta(page);
   await page.keyboard.down('Shift');