diff --git a/.github/workflows/deploy-latest.yml b/.github/workflows/deploy-latest.yml
index 8445f1d8..73b97a19 100644
--- a/.github/workflows/deploy-latest.yml
+++ b/.github/workflows/deploy-latest.yml
@@ -31,7 +31,7 @@ jobs:
     - name: Run tests
       run: pytest
     - name: Build fixtures.db
-      run: python tests/fixtures.py fixtures.db fixtures.json
+      run: python tests/fixtures.py fixtures.db fixtures.json plugins
     - name: Build docs.db
       run: |-
         cd docs
@@ -50,6 +50,7 @@ jobs:
         gcloud config set project datasette-222320
         datasette publish cloudrun fixtures.db \
             -m fixtures.json \
+            --plugins-dir=plugins \
             --branch=$GITHUB_SHA \
             --version-note=$GITHUB_SHA \
             --extra-options="--config template_debug:1" \
diff --git a/tests/fixtures.py b/tests/fixtures.py
index 2f8383ef..5cbfc72f 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -267,7 +267,7 @@ def generate_sortable_rows(num):
 
 METADATA = {
     "title": "Datasette Fixtures",
-    "description": "An example SQLite database demonstrating Datasette",
+    "description_html": 'An example SQLite database demonstrating Datasette. <a href="/login-as-root">Sign in as root user</a>',
     "license": "Apache License 2.0",
     "license_url": "https://github.com/simonw/datasette/blob/master/LICENSE",
     "source": "tests/fixtures.py",
diff --git a/tests/plugins/my_plugin.py b/tests/plugins/my_plugin.py
index 8fc6a1b4..b487cdf0 100644
--- a/tests/plugins/my_plugin.py
+++ b/tests/plugins/my_plugin.py
@@ -177,7 +177,7 @@ def actor_from_request(datasette, request):
 def asgi_wrapper():
     def wrap(app):
         async def maybe_set_actor_in_scope(scope, recieve, send):
-            if b"_actor_in_scope" in scope["query_string"]:
+            if b"_actor_in_scope" in scope.get("query_string", b""):
                 scope = dict(scope, actor={"id": "from-scope"})
                 print(scope)
             await app(scope, recieve, send)
@@ -237,12 +237,33 @@ def register_routes():
             await datasette.render_template("render_message.html", request=request)
         )
 
+    def login_as_root(datasette, request):
+        # Mainly for the latest.datasette.io demo
+        if request.method == "POST":
+            response = Response.redirect("/")
+            response.set_cookie(
+                "ds_actor", datasette.sign({"a": {"id": "root"}}, "actor")
+            )
+            return response
+        return Response.html(
+            """
+            <form action="{}" method="POST">
+                <p>
+                    <input type="hidden" name="csrftoken" value="{}">
+                    <input type="submit" value="Sign in as root user"></p>
+            </form>
+        """.format(
+                request.path, request.scope["csrftoken"]()
+            )
+        )
+
     return [
         (r"/one/$", one),
         (r"/two/(?P<name>.*)$", two),
         (r"/three/$", three),
         (r"/post/$", post),
         (r"/csrftoken-form/$", csrftoken_form),
+        (r"/login-as-root$", login_as_root),
         (r"/not-async/$", not_async),
         (r"/add-message/$", add_message),
         (r"/render-message/$", render_message),
diff --git a/tests/test_html.py b/tests/test_html.py
index fed643a9..7c068085 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -23,7 +23,7 @@ def test_homepage(app_client_two_attached_databases):
     soup = Soup(response.body, "html.parser")
     assert "Datasette Fixtures" == soup.find("h1").text
     assert (
-        "An example SQLite database demonstrating Datasette"
+        "An example SQLite database demonstrating Datasette. Sign in as root user"
         == soup.select(".metadata-description")[0].text.strip()
     )
     # Should be two attached databases
@@ -949,8 +949,9 @@ def test_index_metadata(app_client):
     assert response.status == 200
     soup = Soup(response.body, "html.parser")
     assert "Datasette Fixtures" == soup.find("h1").text
-    assert "An example SQLite database demonstrating Datasette" == inner_html(
-        soup.find("div", {"class": "metadata-description"})
+    assert (
+        'An example SQLite database demonstrating Datasette. <a href="/login-as-root">Sign in as root user</a>'
+        == inner_html(soup.find("div", {"class": "metadata-description"}))
     )
     assert_footer_links(soup)
 
@@ -1451,6 +1452,7 @@ def test_base_url_config(app_client_base_url_prefix, path):
                 "https://github.com/simonw/datasette",
                 "https://github.com/simonw/datasette/blob/master/LICENSE",
                 "https://github.com/simonw/datasette/blob/master/tests/fixtures.py",
+                "/login-as-root",  # Only used for the latest.datasette.io demo
             }
             and not href.startswith("https://plugin-example.com/")
         ):