Get a 404 page already when calling with trailing slash

Question

My SEO agency complains about the following:

Let's assume the URL http://example.com/foo leads to a non-existing page. Then Drupal correctly responds with a 404.

Now,

• if I call http://example.com/foo/ (with a trailing slash),
• Drupal first redirects to http://example.com/foo (without trailing slash)
• and only then responds with 404.

The SEO agency says that this way I loose "crawl equity".

The desired behaviour would be that

• I call http://example.com/foo/
• and immediately get a 404 page.

What is the best way to achieve this?

Answer 1

Most likely you have a written rule htaссess 301 redirect. Possibly it is written in the code or via modules.