How about using a rewrite rule that checks to see if the "providers" part of the URL is the end of it?
RewriteRule ^/providers$ /test/home.aspx [L]
This should then only stop if the given URL in your post is used.
If you need to pick up on /providers or /providers/ then just use
RewriteRule ^/providers/?$ /test/home.aspx [L]
Hope this helps.