diff --git a/datasette/templates/_codemirror.html b/datasette/templates/_codemirror.html
index 17342be5..e450f31e 100644
--- a/datasette/templates/_codemirror.html
+++ b/datasette/templates/_codemirror.html
@@ -1,7 +1,7 @@
-<script src="/-/static/sql-formatter-2.3.3.min.js" defer></script>
-<script src="/-/static/codemirror-5.31.0.js"></script>
-<link rel="stylesheet" href="/-/static/codemirror-5.31.0-min.css" />
-<script src="/-/static/codemirror-5.31.0-sql.min.js"></script>
+<script src="{{ base_url }}-/static/sql-formatter-2.3.3.min.js" defer></script>
+<script src="{{ base_url }}-/static/codemirror-5.31.0.js"></script>
+<link rel="stylesheet" href="{{ base_url }}-/static/codemirror-5.31.0-min.css" />
+<script src="{{ base_url }}-/static/codemirror-5.31.0-sql.min.js"></script>
 <style>
     .CodeMirror { height: auto; min-height: 70px; width: 80%; border: 1px solid #ddd; }
     .CodeMirror-scroll { max-height: 200px; }
diff --git a/datasette/templates/base.html b/datasette/templates/base.html
index d26043f8..d9fd945b 100644
--- a/datasette/templates/base.html
+++ b/datasette/templates/base.html
@@ -2,7 +2,7 @@
 <html>
 <head>
     <title>{% block title %}{% endblock %}</title>
-    <link rel="stylesheet" href="/-/static/app.css?{{ app_css_hash }}">
+    <link rel="stylesheet" href="{{ base_url }}-/static/app.css?{{ app_css_hash }}">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 {% for url in extra_css_urls %}
     <link rel="stylesheet" href="{{ url.url }}"{% if url.sri %} integrity="{{ url.sri }}" crossorigin="anonymous"{% endif %}>
diff --git a/tests/fixtures.py b/tests/fixtures.py
index 5cc64a16..2ea40138 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -351,7 +351,7 @@ def prepare_connection(conn, database, datasette):
 
 @hookimpl
 def extra_css_urls(template, database, table, datasette):
-    return ['https://example.com/{}/extra-css-urls-demo.css'.format(
+    return ['https://plugin-example.com/{}/extra-css-urls-demo.css'.format(
         base64.b64encode(json.dumps({
             "template": template,
             "database": database,
@@ -363,9 +363,9 @@ def extra_css_urls(template, database, table, datasette):
 @hookimpl
 def extra_js_urls():
     return [{
-        'url': 'https://example.com/jquery.js',
+        'url': 'https://plugin-example.com/jquery.js',
         'sri': 'SRIHASH',
-    }, 'https://example.com/plugin1.js']
+    }, 'https://plugin-example.com/plugin1.js']
 
 
 @hookimpl
@@ -421,9 +421,9 @@ import json
 @hookimpl
 def extra_js_urls():
     return [{
-        'url': 'https://example.com/jquery.js',
+        'url': 'https://plugin-example.com/jquery.js',
         'sri': 'SRIHASH',
-    }, 'https://example.com/plugin2.js']
+    }, 'https://plugin-example.com/plugin2.js']
 
 
 @hookimpl
diff --git a/tests/test_html.py b/tests/test_html.py
index 5e50f672..39064033 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -1174,19 +1174,29 @@ def test_base_url_config(base_url, path):
     for client in make_app_client(config={"base_url": base_url}):
         response = client.get(base_url + path.lstrip("/"))
         soup = Soup(response.body, "html.parser")
-        for a in soup.findAll("a"):
-            href = a["href"]
-            if not href.startswith("#") and href not in {
-                "https://github.com/simonw/datasette",
-                "https://github.com/simonw/datasette/blob/master/LICENSE",
-                "https://github.com/simonw/datasette/blob/master/tests/fixtures.py",
-            }:
+        for el in soup.findAll(["a", "link", "script"]):
+            if "href" in el.attrs:
+                href = el["href"]
+            elif "src" in el.attrs:
+                href = el["src"]
+            else:
+                continue  # Could be a <script>...</script>
+            if (
+                not href.startswith("#")
+                and href
+                not in {
+                    "https://github.com/simonw/datasette",
+                    "https://github.com/simonw/datasette/blob/master/LICENSE",
+                    "https://github.com/simonw/datasette/blob/master/tests/fixtures.py",
+                }
+                and not href.startswith("https://plugin-example.com/")
+            ):
                 # If this has been made absolute it may start http://localhost/
                 if href.startswith("http://localhost/"):
                     href = href[len("http://localost/") :]
                 assert href.startswith(base_url), {
                     "base_url": base_url,
                     "path": path,
-                    "href_in_document": href,
-                    "link_parent": str(a.parent),
+                    "href_or_src": href,
+                    "element_parent": str(el.parent),
                 }
diff --git a/tests/test_plugins.py b/tests/test_plugins.py
index 7d734056..ba313bc4 100644
--- a/tests/test_plugins.py
+++ b/tests/test_plugins.py
@@ -64,7 +64,7 @@ def test_plugin_extra_js_urls(app_client):
         == {
             "integrity": "SRIHASH",
             "crossorigin": "anonymous",
-            "src": "https://example.com/jquery.js",
+            "src": "https://plugin-example.com/jquery.js",
         }
     ]
 
@@ -74,7 +74,7 @@ def test_plugins_with_duplicate_js_urls(app_client):
     response = app_client.get("/fixtures")
     # This test is a little tricky, as if the user has any other plugins in
     # their current virtual environment those may affect what comes back too.
-    # What matters is that https://example.com/jquery.js is only there once
+    # What matters is that https://plugin-example.com/jquery.js is only there once
     # and it comes before plugin1.js and plugin2.js which could be in either
     # order
     scripts = Soup(response.body, "html.parser").findAll("script")
@@ -82,16 +82,16 @@ def test_plugins_with_duplicate_js_urls(app_client):
     # No duplicates allowed:
     assert len(srcs) == len(set(srcs))
     # jquery.js loaded once:
-    assert 1 == srcs.count("https://example.com/jquery.js")
+    assert 1 == srcs.count("https://plugin-example.com/jquery.js")
     # plugin1.js and plugin2.js are both there:
-    assert 1 == srcs.count("https://example.com/plugin1.js")
-    assert 1 == srcs.count("https://example.com/plugin2.js")
+    assert 1 == srcs.count("https://plugin-example.com/plugin1.js")
+    assert 1 == srcs.count("https://plugin-example.com/plugin2.js")
     # jquery comes before them both
-    assert srcs.index("https://example.com/jquery.js") < srcs.index(
-        "https://example.com/plugin1.js"
+    assert srcs.index("https://plugin-example.com/jquery.js") < srcs.index(
+        "https://plugin-example.com/plugin1.js"
     )
-    assert srcs.index("https://example.com/jquery.js") < srcs.index(
-        "https://example.com/plugin2.js"
+    assert srcs.index("https://plugin-example.com/jquery.js") < srcs.index(
+        "https://plugin-example.com/plugin2.js"
     )
 
 
