diff --git a/test/open-uri/test_open-uri.rb b/test/open-uri/test_open-uri.rb
index 85f2880dba..8fb1f06a82 100644
--- a/test/open-uri/test_open-uri.rb
+++ b/test/open-uri/test_open-uri.rb
@@ -119,11 +119,11 @@ class TestOpenURI < Test::Unit::TestCase
   def test_proxy
     with_http {|srv, dr, url|
       prxy = WEBrick::HTTPProxyServer.new({
-                                     :ServerType => Thread,
-                                     :Logger => WEBrick::Log.new(NullLog),
-                                     :AccessLog => [[NullLog, ""]],
-                                     :BindAddress => '127.0.0.1',
-                                     :Port => 0})
+        :ServerType => Thread,
+        :Logger => WEBrick::Log.new(NullLog),
+        :AccessLog => [[sio=StringIO.new, WEBrick::AccessLog::COMMON_LOG_FORMAT]],
+        :BindAddress => '127.0.0.1',
+        :Port => 0})
       _, p_port, _, p_host = prxy.listeners[0].addr
       begin
         th = prxy.start
@@ -132,17 +132,23 @@ class TestOpenURI < Test::Unit::TestCase
           assert_equal("200", f.status[0])
           assert_equal("proxy", f.read)
         }
+        assert_match(/#{Regexp.quote url}/, sio.string)
+        sio.truncate(0); sio.rewind
         open("#{url}/proxy", :proxy=>URI("http://#{p_host}:#{p_port}/")) {|f|
           assert_equal("200", f.status[0])
           assert_equal("proxy", f.read)
         }
+        assert_match(/#{Regexp.quote url}/, sio.string)
+        sio.truncate(0); sio.rewind
         open("#{url}/proxy", :proxy=>nil) {|f|
           assert_equal("200", f.status[0])
           assert_equal("proxy", f.read)
         }
+        assert_equal("", sio.string)
         assert_raise(ArgumentError) {
           open("#{url}/proxy", :proxy=>:invalid) {}
         }
+        assert_equal("", sio.string)
       ensure
         prxy.shutdown
       end
@@ -154,7 +160,7 @@ class TestOpenURI < Test::Unit::TestCase
       prxy = WEBrick::HTTPProxyServer.new({
         :ServerType => Thread,
         :Logger => WEBrick::Log.new(NullLog),
-        :AccessLog => [[NullLog, ""]],
+        :AccessLog => [[sio=StringIO.new, WEBrick::AccessLog::COMMON_LOG_FORMAT]],
         :ProxyAuthProc => lambda {|req, res|
           if req["Proxy-Authorization"] != "Basic #{['user:pass'].pack('m').chomp}"
             raise WEBrick::HTTPStatus::ProxyAuthenticationRequired
@@ -169,15 +175,20 @@ class TestOpenURI < Test::Unit::TestCase
         open("#{dr}/proxy", "w") {|f| f << "proxy" }
         exc = assert_raise(OpenURI::HTTPError) { open("#{url}/proxy", :proxy=>p_url) {} }
         assert_equal("407", exc.io.status[0])
+        assert_match(/#{Regexp.quote url}/, sio.string)
+        sio.truncate(0); sio.rewind
         open("#{url}/proxy",
             :proxy_http_basic_authentication=>[p_url, "user", "pass"]) {|f|
           assert_equal("200", f.status[0])
           assert_equal("proxy", f.read)
         }
+        assert_match(/#{Regexp.quote url}/, sio.string)
+        sio.truncate(0); sio.rewind
         assert_raise(ArgumentError) {
           open("#{url}/proxy",
               :proxy_http_basic_authentication=>[true, "user", "pass"]) {}
         }
+        assert_equal("", sio.string)
       ensure
         prxy.shutdown
       end
diff --git a/test/open-uri/test_ssl.rb b/test/open-uri/test_ssl.rb
index 28c9ecf46f..29c794a598 100644
--- a/test/open-uri/test_ssl.rb
+++ b/test/open-uri/test_ssl.rb
@@ -1,8 +1,10 @@
 require 'test/unit'
 require 'open-uri'
 require 'openssl'
+require 'stringio'
 require 'webrick'
 require 'webrick/https'
+require 'webrick/httpproxy'
 
 class TestOpenURISSL < Test::Unit::TestCase
 
@@ -59,6 +61,31 @@ class TestOpenURISSL < Test::Unit::TestCase
     }
   end
 
+  def test_proxy
+    with_https {|srv, dr, url|
+      cacert_filename = "#{dr}/cacert.pem"
+      open(cacert_filename, "w") {|f| f << CA_CERT }
+      prxy = WEBrick::HTTPProxyServer.new({
+        :ServerType => Thread,
+        :Logger => WEBrick::Log.new(NullLog),
+        :AccessLog => [[sio=StringIO.new, WEBrick::AccessLog::COMMON_LOG_FORMAT]],
+        :BindAddress => '127.0.0.1',
+        :Port => 0})
+      _, p_port, _, p_host = prxy.listeners[0].addr
+      begin
+        th = prxy.start
+        open("#{dr}/proxy", "w") {|f| f << "proxy" }
+        open("#{url}/proxy", :proxy=>"http://#{p_host}:#{p_port}/", :ssl_ca_cert => cacert_filename) {|f|
+          assert_equal("200", f.status[0])
+          assert_equal("proxy", f.read)
+        }
+        assert_match(%r[CONNECT #{url.sub(%r{\Ahttps://}, '')} ], sio.string)
+      ensure
+        prxy.shutdown
+      end
+    }
+  end
+
 end
 
 # mkdir demoCA demoCA/private demoCA/newcerts