The website: https://badssl.com/ supports various versions of TLS using different subdomains, so you can test lots of variations there!
This subdomain and port only supports TLSv1.2 https://tls-v1-2.badssl.com:1012/
This subdomain and port only supports TLSv1.1 https://tls-v1-1.badssl.com:1011/
This subdomain and port only supports TLSv1.0 https://tls-v1-0.badssl.com:1010/
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