diff --git a/a11y-audits/tools/baseline.json b/a11y-audits/tools/baseline.json
index 35f1a73..359b7f4 100644
--- a/a11y-audits/tools/baseline.json
+++ b/a11y-audits/tools/baseline.json
@@ -3,40 +3,32 @@
   "generated": "2026-08-06",
   "scans": {
     "dark/empty-state": {
-      "aria-allowed-role": 1,
       "color-contrast": 3,
-      "landmark-one-main": 1,
       "nested-interactive": 2,
       "region": 1
     },
     "dark/settings-modal": {
-      "aria-allowed-role": 1,
       "color-contrast": 4,
       "nested-interactive": 3,
       "region": 1
     },
     "dark/settings-modal-dropdown-open": {
-      "aria-allowed-role": 1,
       "aria-input-field-name": 1,
       "color-contrast": 4,
       "nested-interactive": 3,
       "region": 6
     },
     "light/empty-state": {
-      "aria-allowed-role": 1,
       "color-contrast": 3,
-      "landmark-one-main": 1,
       "nested-interactive": 2,
       "region": 1
     },
     "light/settings-modal": {
-      "aria-allowed-role": 1,
       "color-contrast": 3,
       "nested-interactive": 3,
       "region": 1
     },
     "light/settings-modal-dropdown-open": {
-      "aria-allowed-role": 1,
       "aria-input-field-name": 1,
       "color-contrast": 3,
       "nested-interactive": 3,
diff --git a/public/index.html b/public/index.html
index 6e51247..a491452 100644
--- a/public/index.html
+++ b/public/index.html
@@ -80,7 +80,7 @@ <h2 class="sidebar__history-heading" id="historyHeading" style="display:none">Hi
     <div class="chat-main">
 
       <!-- Chat history -->
-      <main class="chat-history" id="chatHistory" role="log" aria-live="polite">
+      <main class="chat-history" id="chatHistory">
         <div class="empty-state" id="emptyState">
           <span class="cosmo-avatar large" aria-hidden="true"></span>
           <h1 class="heading-small empty-state__heading">What's on your mind?</h1>
diff --git a/vitest.config.js b/vitest.config.js
new file mode 100644
index 0000000..0ddc764
--- /dev/null
+++ b/vitest.config.js
@@ -0,0 +1,8 @@
+import { defineConfig, configDefaults } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    // a11y-audits/tools has its own package and uses node:test, not vitest.
+    exclude: [...configDefaults.exclude, '**/a11y-audits/**'],
+  },
+});