diff --git a/datasette/templates/_rows_and_columns.html b/datasette/templates/_rows_and_columns.html
index cbfff5af..cbcbc6e3 100644
--- a/datasette/templates/_rows_and_columns.html
+++ b/datasette/templates/_rows_and_columns.html
@@ -1,4 +1,4 @@
-<table>
+<table class="rows-and-columns">
     <thead>
         <tr>
             {% for column in display_columns %}
diff --git a/tests/test_html.py b/tests/test_html.py
index 13433af6..51b5c12f 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -172,6 +172,7 @@ def test_table_html_simple_primary_key(app_client):
     response = app_client.get('/test_tables/simple_primary_key', gather_request=False)
     assert response.status == 200
     table = Soup(response.body, 'html.parser').find('table')
+    assert table['class'] == ['rows-and-columns']
     ths = table.findAll('th')
     assert 'id' == ths[0].find('a').string.strip()
     for expected_col, th in zip(('content',), ths[1:]):