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diff --git a/tests/e2e/markdown-editor.test.e2e.js b/tests/e2e/markdown-editor.test.e2e.js
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+++ b/tests/e2e/markdown-editor.test.e2e.js
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+// @ts-check
+import {expect, test} from '@playwright/test';
+import {load_logged_in_context, login_user} from './utils_e2e.js';
+
+test.beforeAll(async ({browser}, workerInfo) => {
+  await login_user(browser, workerInfo, 'user2');
+});
+
+test('Test markdown indentation', async ({browser}, workerInfo) => {
+  const context = await load_logged_in_context(browser, workerInfo, 'user2');
+
+  const initText = `* first\n* second\n* third\n* last`;
+
+  const page = await context.newPage();
+  const response = await page.goto('/user2/repo1/issues/new');
+  await expect(response?.status()).toBe(200);
+
+  const textarea = page.locator('textarea[name=content]');
+  const tab = '    ';
+  const indent = page.locator('button[data-md-action="indent"]');
+  const unindent = page.locator('button[data-md-action="unindent"]');
+  await textarea.fill(initText);
+  await textarea.click(); // Tab handling is disabled until pointer event or input.
+
+  // Indent, then unindent first line
+  await textarea.focus();
+  await textarea.evaluate((it) => it.setSelectionRange(0, 0));
+  await indent.click();
+  await expect(textarea).toHaveValue(`${tab}* first\n* second\n* third\n* last`);
+  await unindent.click();
+  await expect(textarea).toHaveValue(initText);
+
+  // Indent second line while somewhere inside of it
+  await textarea.focus();
+  await textarea.press('ArrowDown');
+  await textarea.press('ArrowRight');
+  await textarea.press('ArrowRight');
+  await indent.click();
+  await expect(textarea).toHaveValue(`* first\n${tab}* second\n* third\n* last`);
+
+  // Subsequently, select a chunk of 2nd and 3rd line and indent both, preserving the cursor position in relation to text
+  await textarea.focus();
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.indexOf('cond'), it.value.indexOf('hird')));
+  await indent.click();
+  const lines23 = `* first\n${tab}${tab}* second\n${tab}* third\n* last`;
+  await expect(textarea).toHaveValue(lines23);
+  await expect(textarea).toHaveJSProperty('selectionStart', lines23.indexOf('cond'));
+  await expect(textarea).toHaveJSProperty('selectionEnd', lines23.indexOf('hird'));
+
+  // Then unindent twice, erasing all indents.
+  await unindent.click();
+  await expect(textarea).toHaveValue(`* first\n${tab}* second\n* third\n* last`);
+  await unindent.click();
+  await expect(textarea).toHaveValue(initText);
+
+  // Indent and unindent with cursor at the end of the line
+  await textarea.focus();
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.indexOf('cond'), it.value.indexOf('cond')));
+  await textarea.press('End');
+  await indent.click();
+  await expect(textarea).toHaveValue(`* first\n${tab}* second\n* third\n* last`);
+  await unindent.click();
+  await expect(textarea).toHaveValue(initText);
+
+  // Check that Tab does work after input
+  await textarea.focus();
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Shift+Enter'); // Avoid triggering the prefix continuation feature
+  await textarea.pressSequentially('* least');
+  await indent.click();
+  await expect(textarea).toHaveValue(`* first\n* second\n* third\n* last\n${tab}* least`);
+
+  // Check that partial indents are cleared
+  await textarea.focus();
+  await textarea.fill(initText);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.indexOf('* second'), it.value.indexOf('* second')));
+  await textarea.pressSequentially('  ');
+  await unindent.click();
+  await expect(textarea).toHaveValue(initText);
+});
+
+test('Test markdown list continuation', async ({browser}, workerInfo) => {
+  const context = await load_logged_in_context(browser, workerInfo, 'user2');
+
+  const initText = `* first\n* second\n* third\n* last`;
+
+  const page = await context.newPage();
+  const response = await page.goto('/user2/repo1/issues/new');
+  await expect(response?.status()).toBe(200);
+
+  const textarea = page.locator('textarea[name=content]');
+  const tab = '    ';
+  const indent = page.locator('button[data-md-action="indent"]');
+  await textarea.fill(initText);
+
+  // Test continuation of '* ' prefix
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.indexOf('cond'), it.value.indexOf('cond')));
+  await textarea.press('End');
+  await textarea.press('Enter');
+  await textarea.pressSequentially('middle');
+  await expect(textarea).toHaveValue(`* first\n* second\n* middle\n* third\n* last`);
+
+  // Test continuation of '    * ' prefix
+  await indent.click();
+  await textarea.press('Enter');
+  await textarea.pressSequentially('muddle');
+  await expect(textarea).toHaveValue(`* first\n* second\n${tab}* middle\n${tab}* muddle\n* third\n* last`);
+
+  // Test breaking in the middle of a line
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.lastIndexOf('ddle'), it.value.lastIndexOf('ddle')));
+  await textarea.pressSequentially('tate');
+  await textarea.press('Enter');
+  await textarea.pressSequentially('me');
+  await expect(textarea).toHaveValue(`* first\n* second\n${tab}* middle\n${tab}* mutate\n${tab}* meddle\n* third\n* last`);
+
+  // Test not triggering when Shift held
+  await textarea.fill(initText);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Shift+Enter');
+  await textarea.press('Enter');
+  await textarea.pressSequentially('...but not least');
+  await expect(textarea).toHaveValue(`* first\n* second\n* third\n* last\n\n...but not least`);
+
+  // Test continuation of ordered list
+  await textarea.fill(`1. one\n2. two`);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Enter');
+  await textarea.pressSequentially('three');
+  await expect(textarea).toHaveValue(`1. one\n2. two\n3. three`);
+
+  // Test continuation of alternative ordered list syntax
+  await textarea.fill(`1) one\n2) two`);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Enter');
+  await textarea.pressSequentially('three');
+  await expect(textarea).toHaveValue(`1) one\n2) two\n3) three`);
+
+  // Test continuation of blockquote
+  await textarea.fill(`> knowledge is power`);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Enter');
+  await textarea.pressSequentially('france is bacon');
+  await expect(textarea).toHaveValue(`> knowledge is power\n> france is bacon`);
+
+  // Test continuation of checklists
+  await textarea.fill(`- [ ] have a problem\n- [x] create a solution`);
+  await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+  await textarea.press('Enter');
+  await textarea.pressSequentially('write a test');
+  await expect(textarea).toHaveValue(`- [ ] have a problem\n- [x] create a solution\n- [ ] write a test`);
+
+  // Test all conceivable syntax (except ordered lists)
+  const prefixes = [
+    '- ', // A space between the bullet and the content is required.
+    ' - ', // I have seen single space in front of -/* being used and even recommended, I think.
+    '* ',
+    '+ ',
+    '  ',
+    '    ',
+    '    - ',
+    '\t',
+    '\t\t* ',
+    '> ',
+    '> > ',
+    '- [ ] ',
+    '- [ ]', // This does seem to render, so allow.
+    '* [ ] ',
+    '+ [ ] ',
+  ];
+  for (const prefix of prefixes) {
+    await textarea.fill(`${prefix}one`);
+    await textarea.evaluate((it) => it.setSelectionRange(it.value.length, it.value.length));
+    await textarea.press('Enter');
+    await textarea.pressSequentially('two');
+    await expect(textarea).toHaveValue(`${prefix}one\n${prefix}two`);
+  }
+});