diff --git a/docsrc/imap/developer/developer-testing.rst b/docsrc/imap/developer/developer-testing.rst
index 90062c02416..d6e690ad2f1 100644
--- a/docsrc/imap/developer/developer-testing.rst
+++ b/docsrc/imap/developer/developer-testing.rst
@@ -45,6 +45,7 @@ Install and configure Cassandane
 
    .. code-block:: bash
 
+        sudo cpan -i AnyEvent Config::IniFiles Data::GUID Digest::CRC File::Slurp IO::File::fcntl IO::Socket::INET6 Net::Server::PreForkSimple News::NNTPClient Plack::Loader Types::Standard Unix::Syslog XML::Generator XML::Simple
         sudo cpan -i Tie::DataUUID
         sudo cpan -i XML::Spice
         sudo cpan -i XML::Fast