The following tests may fail:

• tests.test_scrapbook_indexer.TestUnSingleHtmlConverter.test_rewrite_svg
• tests.test_scrapbook_indexer.TestUnSingleHtmlConverter.test_rewrite_svg_file

-   <script href="313d6864fa48b411d082f7692efd0c0892788fc4.es"></script>
?                                                          ^
+   <script href="313d6864fa48b411d082f7692efd0c0892788fc4.js"></script>
?                                                          ^

Originally I mentioned it in #34 (comment)

I think the origin of the issue is

In [1]: import mimetypes

In [2]: mimetypes.guess_extension("text/javascript")
Out[2]: '.es'

due to

grep -w es /etc/mime.types 
text/javascript                                 es js mjs

It is specific to Debian Linux and its derivatives
https://salsa.debian.org/debian/media-types/-/commit/f67681aabbce05378e0ac45f92d398f8b7a31d5e
while RedHat-based distributions (Fedora, etc.) are not affected
https://pagure.io/mailcap/blob/master/f/mime.types#_1990

While I believe that it was oversight of the Debian media-types project to put es suffix before js, PyWebScrapBook should either explicitly set text/javascript to .js mapping or should allow .es in tests.