To disable the test page, comment out all the lines in the file /etc/httpd/conf.d/welcome.conf using # as follows:

# <LocationMatch "^/+$">
#    Options -Indexes
#    ErrorDocument 403 /.noindex.html
# </LocationMatch>

# <Directory /usr/share/httpd/noindex>
#    AllowOverride None
#    Require all granted
# </Directory>

# Alias /.noindex.html /usr/share/httpd/noindex/index.html