Percona toolkit can't be installed from tools testing repo on amazon linux 2

[root@amazon2 ~]# percona-release enable-only tools testing
...
[root@amazon2 ~]# yum install percona-toolkit
Loaded plugins: dkms-build-requires, langpacks, priorities, update-motd
http://repo.percona.com/tools/yum/testing/2/RPMS/noarch/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
...
[root@amazon2 ~]# cat /etc/system-release
Amazon Linux release 2 (Karoo)

[root@amazon2 ~]# percona-release enable-only tools
* Disabling all Percona Repositories
* Enabling the Percona Tools repository
<*> All done!
[root@amazon2 ~]# yum install percona-toolkit
Loaded plugins: dkms-build-requires, langpacks, priorities, update-motd
amzn2-core                                                                                                                                                                                                                                                                                             | 2.4 kB  00:00:00
amzn2extra-docker                                                                                                                                                                                                                                                                                      | 1.3 kB  00:00:00
epel/x86_64/metalink                                                                                                                                                                                                                                                                                   |  15 kB  00:00:00
tools-release-noarch                                                                                                                                                                                                                                                                                   | 2.9 kB  00:00:00
tools-release-x86_64                                                                                                                                                                                                                                                                                   | 2.9 kB  00:00:00
(1/2): tools-release-noarch/2/primary_db                                                                                                                                                                                                                                                               | 1.1 kB  00:00:00
(2/2): tools-release-x86_64/2/primary_db                                                                                                                                                                                                                                                               |  43 kB  00:00:00
190 packages excluded due to repository priority protections
...
Installed:
  percona-toolkit.x86_64 0:3.1.0-2.el7

Dependency Installed:
  perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.amzn2.0.2         perl-Compress-Raw-Zlib.x86_64 1:2.061-4.amzn2.0.2         perl-DBD-MySQL.x86_64 0:4.023-6.amzn2           perl-DBI.x86_64 0:1.627-4.amzn2.0.2                  perl-Data-Dumper.x86_64 0:2.145-3.amzn2.0.2         perl-Digest.noarch 0:1.17-245.amzn2
  perl-Digest-MD5.x86_64 0:2.52-3.amzn2.0.2                  perl-IO-Compress.noarch 0:2.061-2.amzn2                   perl-IO-Socket-IP.noarch 0:0.21-5.amzn2         perl-IO-Socket-SSL.noarch 0:1.94-7.amzn2.0.1         perl-Mozilla-CA.noarch 0:20130114-5.amzn2           perl-Net-Daemon.noarch 0:0.48-5.amzn2
  perl-Net-LibIDN.x86_64 0:0.12-15.amzn2.0.2                 perl-Net-SSLeay.x86_64 0:1.55-6.amzn2.0.1                 perl-PlRPC.noarch 0:0.2020-14.amzn2             perl-TermReadKey.x86_64 0:2.30-20.amzn2.0.2

Complete!