diff --git a/src/tests/frontend/specs/chat_hooks.js b/src/tests/frontend/specs/chat_hooks.js
new file mode 100644
index 000000000..2a0307a80
--- /dev/null
+++ b/src/tests/frontend/specs/chat_hooks.js
@@ -0,0 +1,64 @@
+'use strict';
+
+describe('chat hooks', function () {
+  let hooks;
+  const hooksBackup = {};
+
+  const loadPad = async (opts = {}) => {
+    await helper.aNewPad(opts);
+    ({hooks} = helper.padChrome$.window.require('ep_etherpad-lite/static/js/pluginfw/plugin_defs'));
+    for (const [name, defs] of Object.entries(hooks)) {
+      hooksBackup[name] = defs;
+      hooks[name] = [...defs];
+    }
+    await helper.showChat();
+  };
+
+  before(async function () {
+    await loadPad();
+  });
+
+  afterEach(async function () {
+    for (const [name, defs] of Object.entries(hooksBackup)) hooks[name] = [...defs];
+    for (const name of Object.keys(hooks)) {
+      if (hooksBackup[name] == null) delete hooks[name];
+    }
+  });
+
+  const checkHook = async (hookName, checkFn) => {
+    if (hooks[hookName] == null) hooks[hookName] = [];
+    await new Promise((resolve, reject) => {
+      hooks[hookName].push({
+        hook_fn: async (hookName, context) => {
+          if (checkFn == null) return;
+          try {
+            // Make sure checkFn is called only once.
+            const _checkFn = checkFn;
+            checkFn = null;
+            await _checkFn(context);
+          } catch (err) {
+            reject(err);
+            return;
+          }
+          resolve();
+        },
+      });
+    });
+  };
+
+  describe('chatNewMessage', function () {
+    for (const [desc, msg, wantRegEx] of [
+      ['HTML is escaped', '<script>alert("foo");</script>', /^[^<]*$/],
+      ['URL becomes a link', 'https://etherpad.org', /<a [^>]*href/],
+    ]) {
+      it(`text processing: ${desc}`, async function () {
+        await Promise.all([
+          checkHook('chatNewMessage', ({text}) => {
+            expect(text).to.match(wantRegEx);
+          }),
+          helper.sendChatMessage(`${msg}{enter}`),
+        ]);
+      });
+    }
+  });
+});