diff --git a/lib/net/imap.rb b/lib/net/imap.rb
index 56e3d833..2a217e45 100644
--- a/lib/net/imap.rb
+++ b/lib/net/imap.rb
@@ -363,8 +363,7 @@ class IMAP < Protocol
     # Seconds to wait until an IDLE response is received.
     attr_reader :idle_response_timeout
 
-    # The thread to receive exceptions.
-    attr_accessor :client_thread
+    attr_accessor :client_thread # :nodoc:
 
     # Returns the debug mode.
     def self.debug
@@ -1269,9 +1268,7 @@ def idle_done
     #
     # port::  Port number (default value is 143 for imap, or 993 for imaps)
     # ssl::   If +options[:ssl]+ is true, then an attempt will be made
-    #         to use SSL (now TLS) to connect to the server.  For this to work
-    #         OpenSSL [OSSL] and the Ruby OpenSSL [RSSL] extensions need to
-    #         be installed.
+    #         to use SSL (now TLS) to connect to the server.
     #         If +options[:ssl]+ is a hash, it's passed to
     #         OpenSSL::SSL::SSLContext#set_params as parameters.
     # open_timeout:: Seconds to wait until a connection is opened
diff --git a/lib/net/imap/errors.rb b/lib/net/imap/errors.rb
index 33dd541c..b353756f 100644
--- a/lib/net/imap/errors.rb
+++ b/lib/net/imap/errors.rb
@@ -51,7 +51,7 @@ class ByeResponseError < ResponseError
     class UnknownResponseError < ResponseError
     end
 
-    RESPONSE_ERRORS = Hash.new(ResponseError)
+    RESPONSE_ERRORS = Hash.new(ResponseError) # :nodoc:
     RESPONSE_ERRORS["NO"] = NoResponseError
     RESPONSE_ERRORS["BAD"] = BadResponseError