Rubyをソース(stable-snapshot, 2.2.3p136, rev50924)からビルドしたのち,"make -k
check"でテストしてみると,以下のようなエラーメッセージが出てきました.

[ 6104/16037] TestGemRemoteFetcher#test_ssl_connection = 0.12 s
  1) Error:
TestGemRemoteFetcher#test_ssl_connection:
Gem::RemoteFetcher::FetchError: SSL_connect returned=1 errno=0 state=SSLv3
read server certificate request A: dh key too small (
https://localhost:43641/yaml)
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/request.rb:88:in `rescue
in connection_for'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/request.rb:85:in
`connection_for'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/request.rb:140:in
`perform_request'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/request.rb:109:in `fetch'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/remote_fetcher.rb:346:in
`request'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/remote_fetcher.rb:231:in
`fetch_http'
    /home/xxxxx/ruby/stable-snapshot/lib/rubygems/remote_fetcher.rb:267:in
`fetch_path'

/home/xxxxx/ruby/stable-snapshot/test/rubygems/test_gem_remote_fetcher.rb:687:in
`block in test_ssl_connection'

/home/xxxxx/ruby/stable-snapshot/test/rubygems/test_gem_remote_fetcher.rb:762:in
`with_configured_fetcher'

/home/xxxxx/ruby/stable-snapshot/test/rubygems/test_gem_remote_fetcher.rb:686:in
`test_ssl_connection'

同様のエラーが他2箇所報告されます.これはどのようなエラーで,これを解消するにはどのようにすればよいのでしょうか?
LocalhostのSSLのキーが短すぎると言っているようなのですが.

-- 
俊(とし)