--- a/tests/plotting/tinypages/conf.py
+++ b/tests/plotting/tinypages/conf.py
@@ -36,7 +36,7 @@
     'numpydoc',
     'matplotlib.sphinxext.plot_directive',
     'pyvista.ext.plot_directive',
-    'pyvista.ext.viewer_directive',
+#    'pyvista.ext.viewer_directive',
     'sphinx.ext.autosummary',
     'sphinx_design',
 ]
--- a/tests/plotting/test_tinypages.py
+++ b/tests/plotting/test_tinypages.py
@@ -71,7 +71,7 @@
 
     assert html_dir.is_dir()
 
-    def plot_file(plt, num, subnum, extension='vtksz'):
+    def plot_file(plt, num, subnum, extension='png'):
         return html_dir / f'some_plots-{plt}_{num:02d}_{subnum:02d}.{extension}'
 
     # verify directives generating a figure generated figures