ssh: No knownhosts entry created in tests

Running tests for ssh earlier cloged the .ssh/knownhosts of the user
running the test with 28 entries.  This is fixed now, and no entry
should be created.

12 files changed, 165 insertions, 80 deletions

diff --git a/lib/ssh/test/ssh_algorithms_SUITE.erl b/lib/ssh/test/ssh_algorithms_SUITE.erl
index 21d7c92236..1b8c09c088 100644
--- a/lib/ssh/test/ssh_algorithms_SUITE.erl
+++ b/lib/ssh/test/ssh_algorithms_SUITE.erl
@@ -364,6 +364,7 @@ sshc_simple_exec_os_cmd(Config) ->
                                                         " -o UserKnownHostsFile=",KnownHosts,
                                                         " -o CheckHostIP=no"
                                                         " -o StrictHostKeyChecking=no"
+                                                        " -o UpdateHostKeys=no"
                                                         " -q"
                                                         " -x"
                                                         ],
@@ -394,10 +395,8 @@ sshd_simple_exec(Config) ->
             _ -> []
         end,
     ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT,
-                                             [{silently_accept_hosts, true},
-                                              proplists:get_value(pref_algs,Config),
-					      {user_interaction, false}
-                                              | ClientPubKeyOpts]),
+                                         [proplists:get_value(pref_algs,Config)
+                                          | ClientPubKeyOpts]),
     {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
     success = ssh_connection:exec(ConnectionRef, ChannelId0,
 				  "echo testing", infinity),
diff --git a/lib/ssh/test/ssh_basic_SUITE.erl b/lib/ssh/test/ssh_basic_SUITE.erl
index c1251338f9..e2993cd14f 100644
--- a/lib/ssh/test/ssh_basic_SUITE.erl
+++ b/lib/ssh/test/ssh_basic_SUITE.erl
@@ -550,7 +550,7 @@ shell_ssh_conn(Config) when is_list(Config) ->
     ct:sleep(500),
 
     IO = ssh_test_lib:start_io_server(),
-    {ok,C} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+    C = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
                                       {user_dir, UserDir},
                                       {user_interaction, false}]),
     Shell = ssh_test_lib:start_shell(C, IO, undefined),
@@ -716,7 +716,9 @@ known_hosts(Config) when is_list(Config) ->
     ConnectionRef =
 	ssh_test_lib:connect(Host, Port, [{user_dir, PrivDir},
 					  {user_interaction, false},
-					  silently_accept_hosts]),
+					  {silently_accept_hosts, true},
+                                          {save_accepted_host, true}
+                                         ]),
     {ok, _Channel} = ssh_connection:session_channel(ConnectionRef, infinity),
     ok = ssh:close(ConnectionRef),
     {ok, Binary} = file:read_file(KnownHosts),
@@ -745,7 +747,9 @@ known_hosts(Config) when is_list(Config) ->
     _ConnectionRef2 =
 	ssh_test_lib:connect(Host, Port, [{user_dir, PrivDir},
 					  {user_interaction, false},
-					  silently_accept_hosts]),
+					  {silently_accept_hosts, true},
+                                          {save_accepted_host, true}
+                                         ]),
     {ok, Binary2} = file:read_file(KnownHosts),
     case Binary of
         Binary2 -> ok;
@@ -758,7 +762,9 @@ known_hosts(Config) when is_list(Config) ->
      _ConnectionRef3 =
 	ssh_test_lib:connect(Host, Port, [{user_dir, PrivDir},
 					  {user_interaction, false},
-					  silently_accept_hosts]),
+					  {silently_accept_hosts, true},
+                                          {save_accepted_host, true}
+                                         ]),
     ct:log("New known_hosts:~n~p",[Binary3]),
     {ok, Binary4} = file:read_file(KnownHosts),
     case Binary3 of
@@ -979,6 +985,7 @@ internal_error(Config) when is_list(Config) ->
 
     {error, Error} =
         ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
                                  {user_dir, UserDir},
                                  {user_interaction, false}]),
     check_error(Error),
@@ -1091,7 +1098,7 @@ double_close(Config) when is_list(Config) ->
 					     {user_dir, UserDir},
 					     {user_passwords, [{"vego", "morot"}]},
 					     {failfun, fun ssh_test_lib:failfun/2}]),
-    {ok, CM} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+    CM = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
 					   {user_dir, UserDir},
 					    {user, "vego"},
 					    {password, "morot"},
@@ -1119,7 +1126,7 @@ daemon_opt_fd(Config) ->
 			       {failfun, fun ssh_test_lib:failfun/2}]),
     
     {ok,{_Host1,Port1}} = inet:sockname(S1),
-    {ok, C1} = ssh:connect("localhost", Port1, [{silently_accept_hosts, true},
+    C1 = ssh_test_lib:connect(Port1, [{silently_accept_hosts, true},
 					  {user_dir, UserDir},
 					  {user, "vego"},
 					  {password, "morot"},
@@ -1149,7 +1156,7 @@ multi_daemon_opt_fd(Config) ->
 					  {failfun, fun ssh_test_lib:failfun/2}]),
 
 		{ok,{_Host,Port}} = inet:sockname(S),
-		{ok, C} = ssh:connect("localhost", Port, [{silently_accept_hosts, true},
+		C = ssh_test_lib:connect(Port, [{silently_accept_hosts, true},
 							  {user_dir, UserDir},
 							  {user, "vego"},
 							  {password, "morot"},
@@ -1470,7 +1477,7 @@ basic_test(Config) ->
     ServerOpts = proplists:get_value(server_opts, Config),
     
     {Pid, Host, Port} = ssh_test_lib:daemon(ServerOpts),
-    {ok, CM} = ssh:connect(Host, Port, ClientOpts),
+    CM = ssh_test_lib:connect(Host, Port, ClientOpts),
     ok = ssh:close(CM),
     ssh:stop_daemon(Pid).
 
diff --git a/lib/ssh/test/ssh_bench_SUITE.erl b/lib/ssh/test/ssh_bench_SUITE.erl
index 98c1936c43..202d4f0733 100644
--- a/lib/ssh/test/ssh_bench_SUITE.erl
+++ b/lib/ssh/test/ssh_bench_SUITE.erl
@@ -156,6 +156,7 @@ transfer_text(Config) ->
                {password, proplists:get_value(pwd,      Config)},
                {user_dir, proplists:get_value(priv_dir, Config)},
                {silently_accept_hosts, true},
+               {save_accepted_host, false},
                {user_interaction, false},
                {max_random_length_padding, 0}
               ],
diff --git a/lib/ssh/test/ssh_compat_SUITE.erl b/lib/ssh/test/ssh_compat_SUITE.erl
index bb46653657..1fb364842d 100644
--- a/lib/ssh/test/ssh_compat_SUITE.erl
+++ b/lib/ssh/test/ssh_compat_SUITE.erl
@@ -228,6 +228,7 @@ login_otp_is_client(Config) ->
                                                  {user,?USER},
                                                  {user_dir, Dir},
                                                  {silently_accept_hosts,true},
+                                                 {save_accepted_host, false},
                                                  {user_interaction,false}
                                                  | Opts
                                                 ])
@@ -296,6 +297,7 @@ all_algorithms_sftp_exec_reneg_otp_is_client(Config) ->
                                            {user_dir, new_dir(Config)},
                                            {preferred_algorithms, [{Tag,[Alg]} | PrefAlgs]},
                                            {silently_accept_hosts,true},
+                                           {save_accepted_host, false},
                                            {user_interaction,false}
                                           ])  ,
                           test_erl_client_reneg(ConnRes, % Seems that max 10 channels may be open in sshd
@@ -366,7 +368,7 @@ reneg_tester_loop(Parent, Ref, HostConnRef, Kex1) ->
 send_recv_big_with_renegotiate_otp_is_client(Config) ->
     %% Connect to the remote openssh server:
     {IP,Port} = ip_port(Config),
-    {ok,C} = ssh:connect(IP, Port, [{user,?USER},
+    C = ssh_test_lib:connect(IP, Port, [{user,?USER},
                                     {password,?PASSWD},
                                     {user_dir, setup_remote_auth_keys_and_local_priv('ssh-rsa', Config)},
                                     {silently_accept_hosts,true},
@@ -475,7 +477,7 @@ loop_until(CondFun, DoFun, Acc) ->
 exec_from_docker(Config, HostIP, HostPort, Command, Expects, ExtraSshArg) when is_binary(hd(Expects)),
                                                                                is_list(Config) ->
     {DockerIP,DockerPort} = ip_port(Config),
-    {ok,C} = ssh:connect(DockerIP, DockerPort,
+    C = ssh_test_lib:connect(DockerIP, DockerPort,
                          [{user,?USER},
                           {password,?PASSWD},
                           {user_dir, new_dir(Config)},
@@ -636,6 +638,7 @@ setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, UserDir, Config) ->
                                                    {password, ?PASSWD   },
                                                    {auth_methods, "password"},
                                                    {silently_accept_hosts,true},
+                                                   {save_accepted_host, false},
                                                    {preferred_algorithms, ssh_transport:supported_algorithms()},
                                                    {user_interaction,false}
                                                   ]),
@@ -1184,7 +1187,7 @@ do_check_local_directory(ServerRootDir) ->
 call_sftp_in_docker(Config, ServerIP, ServerPort, Cmnds, UserDir, Ref) ->
     {DockerIP,DockerPort} = ip_port(Config),
     ct:log("Going to connect ~p:~p", [DockerIP, DockerPort]),
-    {ok,C} = ssh:connect(DockerIP, DockerPort,
+    C = ssh_test_lib:connect(DockerIP, DockerPort,
                          [{user,?USER},
                           {password,?PASSWD},
                           {user_dir, UserDir},
diff --git a/lib/ssh/test/ssh_connection_SUITE.erl b/lib/ssh/test/ssh_connection_SUITE.erl
index 2fce57c02b..01eecfabbc 100644
--- a/lib/ssh/test/ssh_connection_SUITE.erl
+++ b/lib/ssh/test/ssh_connection_SUITE.erl
@@ -201,15 +201,16 @@ end_per_testcase(_TestCase, _Config) ->
 %% Test Cases --------------------------------------------------------
 %%--------------------------------------------------------------------
 simple_exec(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     do_simple_exec(ConnectionRef).
 
 %%--------------------------------------------------------------------
 simple_exec_sock(_Config) ->
     {ok, Sock} = ssh_test_lib:gen_tcp_connect(?SSH_DEFAULT_PORT, [{active,false}]),
-    {ok, ConnectionRef} = ssh:connect(Sock, [{silently_accept_hosts, true},
-					     {user_interaction, false}]),
+    {ok, ConnectionRef} = ssh:connect(Sock, [{save_accepted_host, false},
+                                             {silently_accept_hosts, true},
+                                             {user_interaction, true}
+                                            ]),
     do_simple_exec(ConnectionRef).
 
 %%--------------------------------------------------------------------
@@ -219,8 +220,9 @@ simple_exec_two_socks(_Config) ->
                 spawn_link(
                   fun() ->
                           {ok, Sock} = ssh_test_lib:gen_tcp_connect(?SSH_DEFAULT_PORT, [{active,false}]),
-                          {ok, ConnectionRef} = ssh:connect(Sock, [{silently_accept_hosts, true},
-                                                                   {user_interaction, false}]),
+                          {ok, ConnectionRef} = ssh:connect(Sock, [{save_accepted_host, false},
+                                                                   {silently_accept_hosts, true},
+                                                                   {user_interaction, true}]),
                           Parent ! {self(),do_simple_exec(ConnectionRef)}
                   end)
         end,
@@ -236,7 +238,9 @@ simple_exec_two_socks(_Config) ->
 %%--------------------------------------------------------------------
 connect_sock_not_tcp(_Config) ->
     {ok,Sock} = gen_udp:open(0, []), 
-    {error, not_tcp_socket} = ssh:connect(Sock, []),
+    {error, not_tcp_socket} = ssh:connect(Sock, [{save_accepted_host, false},
+                                                 {silently_accept_hosts, true},
+                                                 {user_interaction, true}]),
     gen_udp:close(Sock).
 
 %%--------------------------------------------------------------------
@@ -248,7 +252,9 @@ daemon_sock_not_tcp(_Config) ->
 %%--------------------------------------------------------------------
 connect_sock_not_passive(_Config) ->
     {ok,Sock} = ssh_test_lib:gen_tcp_connect(?SSH_DEFAULT_PORT, []), 
-    {error, not_passive_mode} = ssh:connect(Sock, []),
+    {error, not_passive_mode} = ssh:connect(Sock, [{save_accepted_host, false},
+                                                   {silently_accept_hosts, true},
+                                                   {user_interaction, true}]),
     gen_tcp:close(Sock).
 
 %%--------------------------------------------------------------------
@@ -259,8 +265,7 @@ daemon_sock_not_passive(_Config) ->
 
 %%--------------------------------------------------------------------
 small_cat(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
     success = ssh_connection:exec(ConnectionRef, ChannelId0,
 				  "cat", infinity),
@@ -348,8 +353,7 @@ big_cat(Config) when is_list(Config) ->
 
 %%--------------------------------------------------------------------
 send_after_exit(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
     Data = <<"I like spaghetti squash">>,
 
@@ -413,8 +417,7 @@ encode_decode_pty_opts(_Config) ->
 
 %%--------------------------------------------------------------------
 ptty_alloc_default(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
     Expect = case proplists:get_value(ptty_supported, Config) of
                  true -> success;
@@ -425,8 +428,7 @@ ptty_alloc_default(Config) when is_list(Config) ->
 
 %%--------------------------------------------------------------------
 ptty_alloc(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
     Expect = case proplists:get_value(ptty_supported, Config) of
                  true -> success;
@@ -439,8 +441,7 @@ ptty_alloc(Config) when is_list(Config) ->
 
 %%--------------------------------------------------------------------
 ptty_alloc_pixel(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
+    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
     Expect = case proplists:get_value(ptty_supported, Config) of
                  true -> success;
@@ -940,6 +941,7 @@ start_shell_sock_exec_fun(Config) when is_list(Config) ->
 
     {ok, Sock} = ssh_test_lib:gen_tcp_connect(Host, Port, [{active,false}]),
     {ok,ConnectionRef} = ssh:connect(Sock, [{silently_accept_hosts, true},
+                                            {save_accepted_host, false},
 					    {user, "foo"},
 					    {password, "morot"},
 					    {user_interaction, true},
@@ -983,6 +985,7 @@ start_shell_sock_daemon_exec(Config) ->
     %% The client accepts the tcp connection from the server and ssh-connects to it
     {ok,Sc} = gen_tcp:accept(Sl),
     {ok,ConnectionRef} = ssh:connect(Sc, [{silently_accept_hosts, true},
+                                          {save_accepted_host, false},
 					  {user, "foo"},
 					  {password, "morot"},
 					  {user_interaction, true},
@@ -1035,6 +1038,7 @@ start_shell_sock_daemon_exec_multi(Config) ->
         [begin
              {ok,Sc} = gen_tcp:accept(Sl),
              {ok,ConnectionRef} = ssh:connect(Sc, [{silently_accept_hosts, true},
+                                                   {save_accepted_host, false},
                                                    {user, "foo"},
                                                    {password, "morot"},
                                                    {user_interaction, true},
@@ -1186,6 +1190,8 @@ stop_listener(Config) when is_list(Config) ->
     ssh:stop_listener(Host, Port),
 
     {error, _} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                          {save_accepted_host, false},
+                                          {save_accepted_host, false},
 					  {user, "foo"},
 					  {password, "morot"},
 					  {user_interaction, true},
@@ -1210,6 +1216,7 @@ stop_listener(Config) when is_list(Config) ->
 							       {user_interaction, true},
 							       {user_dir, UserDir}]),
 	    {error, _} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                                  {save_accepted_host, false},
                                                   {user, "foo"},
                                                   {password, "morot"},
                                                   {user_interaction, true},
diff --git a/lib/ssh/test/ssh_options_SUITE.erl b/lib/ssh/test/ssh_options_SUITE.erl
index 88b3d09eba..773a6e37f5 100644
--- a/lib/ssh/test/ssh_options_SUITE.erl
+++ b/lib/ssh/test/ssh_options_SUITE.erl
@@ -258,6 +258,7 @@ server_password_option(Config) when is_list(Config) ->
     
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "vego"},
 				 {password, "foo"},
 				 {user_interaction, false},
@@ -290,12 +291,14 @@ server_userpassword_option(Config) when is_list(Config) ->
 
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "foo"},
 				 {password, "morot"},
 				 {user_interaction, false},
 				 {user_dir, UserDir}]),
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "vego"},
 				 {password, "foo"},
 				 {user_interaction, false},
@@ -325,12 +328,14 @@ server_pwdfun_option(Config) ->
     
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "foo"},
 				 {password, "morot"},
 				 {user_interaction, false},
 				 {user_dir, UserDir}]),
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "vego"},
 				 {password, "foo"},
 				 {user_interaction, false},
@@ -371,12 +376,14 @@ server_pwdfun_4_option(Config) ->
     
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "foo"},
 				 {password, "morot"},
 				 {user_interaction, false},
 				 {user_dir, UserDir}]),
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "fie"},
 				 {password, "morot"},
 				 {user_interaction, false},
@@ -390,6 +397,7 @@ server_pwdfun_4_option(Config) ->
 
     {error, Reason} =
 	ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                 {save_accepted_host, false},
 				 {user, "bandit"},
 				 {password, "pwd breaking"},
 				 {user_interaction, false},
@@ -593,14 +601,16 @@ user_dir_option(Config) ->
     %% Any port will do (beware, implementation knowledge!):
     Port = 65535,
 
-    case ssh:connect("localhost", Port, [{user_dir, DirUnread}]) of
+    case ssh:connect("localhost", Port, [{user_dir, DirUnread},
+                                         {save_accepted_host, false}]) of
 	{error,{eoptions,{{user_dir,DirUnread},eacces}}} ->
 	    ok;
 	{error,econnrefused} ->
 	    ct:fail("Didn't detect that dir is unreadable", [])
     end,
 
-    case ssh:connect("localhost", Port, [{user_dir, FileRead}]) of
+    case ssh:connect("localhost", Port, [{user_dir, FileRead},
+                                         {save_accepted_host, false}]) of
 	{error,{eoptions,{{user_dir,FileRead},enotdir}}} ->
 	    ok;
 	{error,econnrefused} ->
@@ -1048,6 +1058,7 @@ ssh_connect_timeout(_Config) ->
     {error,{faked_transport,connect,TimeoutToTransport}} = 
 	ssh:connect("localhost", 12345, 
 		    [{transport,{tcp,?MODULE,tcp_closed}},
+                     {save_accepted_host, false},
 		     {connect_timeout,ConnTimeout}],
 		    1000),
     case TimeoutToTransport of
@@ -1086,7 +1097,7 @@ ssh_connect_arg4_timeout(_Config) ->
     %% try to connect with a timeout, but "supervise" it
     Client = spawn(fun() ->
 			   T0 = erlang:monotonic_time(),
-			   Rc = ssh:connect("localhost",Port,[],Timeout),
+			   Rc = ssh:connect("localhost",Port,[{save_accepted_host, false}],Timeout),
 			   ct:log("Client ssh:connect got ~p",[Rc]),
 			   Parent ! {done,self(),Rc,T0}
 		   end),
@@ -1154,7 +1165,7 @@ ssh_daemon_minimal_remote_max_packet_size_option(Config) ->
 %% This test try every algorithm by connecting to an Erlang server
 id_string_no_opt_client(Config) ->
     {Server, _Host, Port} = fake_daemon(Config),
-    {error,_} = ssh:connect("localhost", Port, [], 1000),
+    {error,_} = ssh:connect("localhost", Port, [{save_accepted_host, false}], 1000),
     receive
 	{id,Server,"SSH-2.0-Erlang/"++Vsn} ->
 	    true = expected_ssh_vsn(Vsn);
@@ -1167,7 +1178,9 @@ id_string_no_opt_client(Config) ->
 %%--------------------------------------------------------------------
 id_string_own_string_client(Config) ->
     {Server, _Host, Port} = fake_daemon(Config),
-    {error,_} = ssh:connect("localhost", Port, [{id_string,"Pelle"}], 1000),
+    {error,_} = ssh:connect("localhost", Port, [{id_string,"Pelle"},
+                                                {save_accepted_host, false}
+                                               ], 1000),
     receive
 	{id,Server,"SSH-2.0-Pelle\r\n"} ->
 	    ok;
@@ -1180,7 +1193,8 @@ id_string_own_string_client(Config) ->
 %%--------------------------------------------------------------------
 id_string_own_string_client_trail_space(Config) ->
     {Server, _Host, Port} = fake_daemon(Config),
-    {error,_} = ssh:connect("localhost", Port, [{id_string,"Pelle "}], 1000),
+    {error,_} = ssh:connect("localhost", Port, [{id_string,"Pelle "},
+                                                {save_accepted_host, false}], 1000),
     receive
 	{id,Server,"SSH-2.0-Pelle \r\n"} ->
 	    ok;
@@ -1193,7 +1207,8 @@ id_string_own_string_client_trail_space(Config) ->
 %%--------------------------------------------------------------------
 id_string_random_client(Config) ->
     {Server, _Host, Port} = fake_daemon(Config),
-    {error,_} = ssh:connect("localhost", Port, [{id_string,random}], 1000),
+    {error,_} = ssh:connect("localhost", Port, [{id_string,random},
+                                                {save_accepted_host, false}], 1000),
     receive
 	{id,Server,Id="SSH-2.0-Erlang"++_} ->
 	    ct:fail("Unexpected id: ~s.",[Id]);
@@ -1365,6 +1380,7 @@ connect_fun(ssh_sftp__start_channel, _Config) ->
 	    {ok,_Pid,ConnRef} =
 		ssh_sftp:start_channel(Host, Port, 
 				       [{silently_accept_hosts, true},
+                                        {save_accepted_host, false},
 					{user, "carni"},
 					{password, "meat"}
 				       ]),
@@ -1477,6 +1493,7 @@ max_sessions_drops_tcp_connects(Config) ->
     SSHconnect = fun(N) ->
                          R = ssh:connect(Host, Port, 
                                          [{silently_accept_hosts, true},
+                                          {save_accepted_host, false},
                                           {user_dir, proplists:get_value(priv_dir,Config)},
                                           {user_interaction, false},
                                           {user, "carni"},
@@ -1539,10 +1556,10 @@ save_accepted_host_option(Config) ->
     {error,enoent} = file:read_file(KnownHosts),
 
     {ok,_C1} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                        {save_accepted_host, false},
                                         {user, "vego"},
                                         {password, "morot"},
                                         {user_interaction, false},
-                                        {save_accepted_host, false},
                                         {user_dir, UserDir}]),
     {error,enoent} = file:read_file(KnownHosts),
     
@@ -1636,6 +1653,7 @@ config_file(Config) ->
             %% First connection. The client_options should be applied:
             {ok,C1} = rpc:call(Node, ssh, connect, [loopback, ?SSH_DEFAULT_PORT,
                                                     [{silently_accept_hosts, true},
+                                                     {save_accepted_host, false},
                                                      {user_interaction, false}
                                                     ]]),
             ct:log("C1 = ~n~p", [C1]),
@@ -1650,6 +1668,7 @@ config_file(Config) ->
             C2_Opts = [{modify_algorithms,[{rm,[{kex,[K1b]}]}, % N.B.
                                            {append, [{kex,[K2a]}]}]},
                        {silently_accept_hosts, true},
+                       {save_accepted_host, false},
                        {user_interaction, false}
                       ],
             {ok,C2} = rpc:call(Node, ssh, connect, [loopback, ?SSH_DEFAULT_PORT, C2_Opts]),
diff --git a/lib/ssh/test/ssh_protocol_SUITE.erl b/lib/ssh/test/ssh_protocol_SUITE.erl
index ab854e4282..41eb6fcdee 100644
--- a/lib/ssh/test/ssh_protocol_SUITE.erl
+++ b/lib/ssh/test/ssh_protocol_SUITE.erl
@@ -1026,6 +1026,7 @@ std_connect(Host, Port, Config, Opts) ->
 		%% Prefere User's Opts to the default opts
 		[O || O = {Tag,_} <- [{user,User},{password,Pwd},
 				      {silently_accept_hosts, true},
+                                      {save_accepted_host, false},
 				      {user_dir, user_dir(Config)},
 				      {user_interaction, false}],
 		      not lists:keymember(Tag, 1, Opts)
diff --git a/lib/ssh/test/ssh_pubkey_SUITE.erl b/lib/ssh/test/ssh_pubkey_SUITE.erl
index 0e5dac6f33..6c78cd2d68 100644
--- a/lib/ssh/test/ssh_pubkey_SUITE.erl
+++ b/lib/ssh/test/ssh_pubkey_SUITE.erl
@@ -568,10 +568,10 @@ ssh_list_public_key(Config) when is_list(Config) ->
 chk_encode(Data, Type) ->
     case ssh_file:decode(ssh_file:encode(Data,Type), Type) of
         Data->
-            ct:pal("re-encode ~p ok", [Type]),
+            ct:log("re-encode ~p ok", [Type]),
             true;
         Result ->
-            ct:pal("re-encode ~p FAILED~n"
+            ct:log("re-encode ~p FAILED~n"
                    "Got~n ~p~nExpect~n ~p~n",
                    [Type, Result, Data]),
             false
@@ -581,10 +581,10 @@ chk_encode(Data, Type) ->
 chk_decode(Data, Expect, Type) ->
     case ssh_file:decode(Data, Type) of
         Expect ->
-            ct:pal("decode ~p ok", [Type]),
+            ct:log("decode ~p ok", [Type]),
             true;
         BadResult ->
-            ct:pal("decode ~p FAILED~n"
+            ct:log("decode ~p FAILED~n"
                    "Result~n ~p~nExpect~n ~p~n"
                    "~p",
                    [Type, BadResult, Expect,
diff --git a/lib/ssh/test/ssh_sftp_SUITE.erl b/lib/ssh/test/ssh_sftp_SUITE.erl
index 89f449040a..2e9c3e3cb6 100644
--- a/lib/ssh/test/ssh_sftp_SUITE.erl
+++ b/lib/ssh/test/ssh_sftp_SUITE.erl
@@ -119,7 +119,8 @@ groups() ->
 
      {unicode, [], [{group,erlang_server},
 		    {group,openssh_server},
-		    sftp_nonexistent_subsystem]},
+		    sftp_nonexistent_subsystem
+                   ]},
 
      {big_recvpkt_size, [], [{group,erlang_server},
 			     {group,openssh_server}]},
@@ -231,7 +232,9 @@ init_per_group(openssh_server, Config) ->
     Host = ssh_test_lib:hostname(),
     case (catch ssh_sftp:start_channel(Host,
 				       [{user_interaction, false},
-					{silently_accept_hosts, true}])) of
+					{silently_accept_hosts, true},
+                                        {save_accepted_host, false}
+                                       ])) of
 	{ok, _ChannelPid, Connection} ->
 	    [{peer, {_HostName,{IPx,Portx}}}] = ssh:connection_info(Connection,[peer]),
 	    ssh:close(Connection),
@@ -250,16 +253,16 @@ init_per_group(remote_tar, Config) ->
     ct:log("Server (~p) at ~p:~p",[proplists:get_value(group,Config),Host,Port]),
     User = proplists:get_value(user, Config),
     Passwd = proplists:get_value(passwd, Config),
-    {ok, Connection} =
+    Connection =
 	case proplists:get_value(group, Config) of
 	    erlang_server ->
-		ssh:connect(Host, Port,
+		ssh_test_lib:connect(Host, Port,
 			    [{user, User},
 			     {password, Passwd},
 			     {user_interaction, false},
 			     {silently_accept_hosts, true}]);
 	    openssh_server ->
-		ssh:connect(Host, Port,
+		ssh_test_lib:connect(Host, Port,
 			    [{user_interaction, false},
 			     {silently_accept_hosts, true}])
 	end,
@@ -312,7 +315,9 @@ init_per_testcase(version_option, Config0) ->
 				{user, User},
 				{password, Passwd},
 				{user_interaction, false},
-				{silently_accept_hosts, true}]),
+				{silently_accept_hosts, true},
+                                {save_accepted_host, false}
+                               ]),
     Sftp = {ChannelPid, Connection},
     [{sftp,Sftp}, {watchdog, Dog} | TmpConfig];
 
@@ -336,7 +341,8 @@ init_per_testcase(Case, Config00) ->
 					   [{user, User},
 					    {password, Passwd},
 					    {user_interaction, false},
-					    {silently_accept_hosts, true}
+					    {silently_accept_hosts, true},
+                                            {save_accepted_host, false}
 					    | PktSzOpt
 					   ]
 					  ),
@@ -349,7 +355,8 @@ init_per_testcase(Case, Config00) ->
 		{ok, ChannelPid, Connection} = 
 		    ssh_sftp:start_channel(Host, 
 					   [{user_interaction, false},
-					    {silently_accept_hosts, true}
+					    {silently_accept_hosts, true},
+                                            {save_accepted_host, false}
 					    | PktSzOpt
 					   ]),
 		Sftp = {ChannelPid, Connection},
@@ -736,7 +743,8 @@ start_channel_sock(Config) ->
 	end,
 
     Opts = [{user_interaction, false},
-	    {silently_accept_hosts, true}
+	    {silently_accept_hosts, true},
+            {save_accepted_host, false}
 	    | LoginOpts],
 
     {Host,Port} = proplists:get_value(peer, Config),
@@ -789,7 +797,9 @@ sftp_nonexistent_subsystem(Config) when is_list(Config) ->
 			       [{user_interaction, false},
 				{user, User},
 				{password, Passwd},
-				{silently_accept_hosts, true}]).
+				{silently_accept_hosts, true},
+                                {save_accepted_host, false}
+                               ]).
 
 %%--------------------------------------------------------------------
 version_option(Config) when is_list(Config) ->
diff --git a/lib/ssh/test/ssh_sup_SUITE.erl b/lib/ssh/test/ssh_sup_SUITE.erl
index c52c95c477..7c31898b0c 100644
--- a/lib/ssh/test/ssh_sup_SUITE.erl
+++ b/lib/ssh/test/ssh_sup_SUITE.erl
@@ -129,7 +129,8 @@ sshc_subtree(Config) when is_list(Config) ->
 
     ?wait_match([], supervisor:which_children(sshc_sup)),
 
-    {ok, Pid1} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+    Pid1 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+                                             {save_accepted_host, false},
 					  {user_interaction, false},
 					  {user, ?USER}, {password, ?PASSWD},{user_dir, UserDir}]),
 
@@ -139,7 +140,8 @@ sshc_subtree(Config) when is_list(Config) ->
                 [SysSup, LocalIP, LocalPort]),
     check_sshc_system_tree(SysSup, Pid1, LocalIP, LocalPort, Config),
 
-    {ok, Pid2} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+    Pid2 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+                                             {save_accepted_host, false},
 					  {user_interaction, false},
 					  {user, ?USER}, {password, ?PASSWD}, {user_dir, UserDir}]),
     ?wait_match([?SYSTEM_SUP(_,_),
@@ -219,7 +221,8 @@ killed_acceptor_restarts(Config) ->
     true = (AccPid /= AccPid2),
 
     %% Connect first client and check it is alive:
-    {ok,C1} = ssh:connect("localhost", Port, [{silently_accept_hosts, true},
+    C1 = ssh_test_lib:connect("localhost", Port, [{silently_accept_hosts, true},
+                                                   {save_accepted_host, false},
                                               {user_interaction, false},
                                               {user, ?USER},
                                               {password, ?PASSWD},
@@ -246,6 +249,7 @@ killed_acceptor_restarts(Config) ->
     %% Connect second client and check it is alive:
     C2 =
         case ssh:connect("localhost", Port, [{silently_accept_hosts, true},
+                                             {save_accepted_host, false},
                                              {user_interaction, false},
                                              {user, ?USER},
                                              {password, ?PASSWD},
@@ -383,7 +387,7 @@ chk_empty_con_daemon(Daemon) ->
 %%-------------------------------------------------------------------------
 check_sshd_system_tree(Daemon, Host, Port, Config) -> 
     UserDir = proplists:get_value(userdir, Config),
-    {ok, ClientConn} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+    ClientConn = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
                                                 {user_interaction, false},
                                                 {user, ?USER},
                                                 {password, ?PASSWD},
diff --git a/lib/ssh/test/ssh_test_lib.erl b/lib/ssh/test/ssh_test_lib.erl
index 9623dc767a..e8f34723f8 100644
--- a/lib/ssh/test/ssh_test_lib.erl
+++ b/lib/ssh/test/ssh_test_lib.erl
@@ -135,12 +135,43 @@ connect(Port, Options) when is_integer(Port) ->
 
 connect(any, Port, Options) ->
     connect(hostname(), Port, Options);
-connect(Host, Port, Options) ->
+
+connect(Host, ?SSH_DEFAULT_PORT, Options0) ->
+    Options =
+        set_opts_if_not_set([{silently_accept_hosts, true},
+                             {save_accepted_host, false},
+                             {user_interaction, false}
+                            ], Options0),
+    do_connect(Host, ?SSH_DEFAULT_PORT, Options);
+
+connect(Host, Port, Options0) ->
+    Options =
+        case proplists:get_value(user_dir,Options0) of
+            undefined ->
+                %% Avoid uppdating the known_hosts if it is the default one
+                set_opts_if_not_set([{save_accepted_host, false}], Options0);
+            _ ->
+                Options0
+        end,
+    do_connect(Host, Port, Options).
+
+
+do_connect(Host, Port, Options) ->
     R = ssh:connect(Host, Port, Options),
     ct:log("~p:~p ssh:connect(~p, ~p, ~p)~n -> ~p",[?MODULE,?LINE,Host, Port, Options, R]),
     {ok, ConnectionRef} = R,
     ConnectionRef.
 
+set_opts_if_not_set(OptsToSet, Options0) ->
+    lists:foldl(fun({K,V}, Opts) ->
+                        case proplists:get_value(K, Opts) of
+                            undefined ->
+                                [{K,V} | Opts];
+                            _ ->
+                                Opts
+                        end
+                end, Options0, OptsToSet).
+
 %%%----------------------------------------------------------------
 daemon(Options) ->
     daemon(any, 0, Options).
@@ -287,7 +318,9 @@ start_shell(Port, IOServer, ExtraOptions) ->
               ct:log("~p:~p:~p ssh_test_lib:start_shell(~p, ~p, ~p)",
                      [?MODULE,?LINE,self(), Port, IOServer, ExtraOptions]),
 	      Options = [{user_interaction, false},
-			 {silently_accept_hosts,true} | ExtraOptions],
+			 {silently_accept_hosts,true},
+                         {save_accepted_host,false}
+                         | ExtraOptions],
               try
                   group_leader(IOServer, self()),
                   case Port of
@@ -535,6 +568,7 @@ openssh_sanity_check(Config) ->
     case ssh:connect("localhost", ?SSH_DEFAULT_PORT,
                      [{password,""},
                       {silently_accept_hosts, true},
+                      {save_accepted_host, false},
                       {user_interaction, false}
                      ]) of
 	{ok, Pid} ->
@@ -560,6 +594,7 @@ default_algorithms(sshd, Host, Port) ->
     try run_fake_ssh(
 	  ssh_trpt_test_lib:exec(
 	    [{connect,Host,Port, [{silently_accept_hosts, true},
+                                  {save_accepted_host, false},
 				  {user_interaction, false}]}]))
     catch
 	_C:_E ->
diff --git a/lib/ssh/test/ssh_to_openssh_SUITE.erl b/lib/ssh/test/ssh_to_openssh_SUITE.erl
index 549239d56c..62d97d9315 100644
--- a/lib/ssh/test/ssh_to_openssh_SUITE.erl
+++ b/lib/ssh/test/ssh_to_openssh_SUITE.erl
@@ -65,7 +65,7 @@ all() ->
 	    {skip, "openSSH not installed on host"};
 	_ ->
 	    [{group, erlang_client},
-	     {group, erlang_server}
+             {group, erlang_server}
 	     ]
     end.
 
@@ -81,7 +81,8 @@ groups() ->
                           erlang_server_openssh_client_renegotiate,
                           exec_with_io_in_sshc,
                           exec_direct_with_io_in_sshc
-			 ]},
+                         ]
+     },
      {tunnel_distro_client, [], [tunnel_in_non_erlclient_erlserver,
                                  tunnel_out_non_erlclient_erlserver]}
     ].
@@ -106,7 +107,7 @@ init_per_group(erlang_server, Config) ->
     Config;
 init_per_group(G, Config) when G==tunnel_distro_server ;
                                G==tunnel_distro_client ->
-    case no_forwarding() of
+    case no_forwarding(Config) of
         true ->
             {skip, "port forwarding disabled in external ssh"};
         false ->
@@ -176,10 +177,9 @@ exec_with_io_in_sshc(Config) when is_list(Config) ->
     ct:sleep(500),
 
     PrivDir = proplists:get_value(priv_dir, Config),
-    KnownHosts = filename:join(PrivDir, "known_hosts"),
     ExecStr = "\"io:read('% ').\"",
     Cmd =  "echo howdy. | " ++ ssh_test_lib:open_sshc_cmd(Host, Port,
-                                                          [" -o UserKnownHostsFile=", KnownHosts,
+                                                          [" -o UserKnownHostsFile=", "/dev/null",
                                                            " -o CheckHostIP=no"
                                                            " -o StrictHostKeyChecking=no"
                                                            " -q"
@@ -210,9 +210,8 @@ exec_direct_with_io_in_sshc(Config) when is_list(Config) ->
     ct:sleep(500),
 
     PrivDir = proplists:get_value(priv_dir, Config),
-    KnownHosts = filename:join(PrivDir, "known_hosts"),
     Cmd =  "echo ciao. | " ++ ssh_test_lib:open_sshc_cmd(Host, Port,
-                                                          [" -o UserKnownHostsFile=", KnownHosts,
+                                                          [" -o UserKnownHostsFile=", "/dev/null",
                                                            " -o CheckHostIP=no"
                                                            " -o StrictHostKeyChecking=no"
                                                            " -q"
@@ -245,9 +244,8 @@ erlang_server_openssh_client_renegotiate(Config) ->
     Data =  lists:duplicate(trunc(1.1*RenegLimitK*1024), $a),
     ok = file:write_file(DataFile, Data),
 
-    KnownHosts = filename:join(PrivDir, "known_hosts"),
     Cmd = ssh_test_lib:open_sshc_cmd(Host, Port,
-                                     [" -o UserKnownHostsFile=", KnownHosts,
+                                     [" -o UserKnownHostsFile=", "/dev/null",
                                       " -o CheckHostIP=no"
                                       " -o StrictHostKeyChecking=no"
                                       " -q"
@@ -301,9 +299,8 @@ tunnel_out_non_erlclient_erlserver(Config) ->
     ListenHost = {127,0,0,1},
     ListenPort = 2345,
 
-    KnownHosts = filename:join(PrivDir, "known_hosts"),
     Cmd = ssh_test_lib:open_sshc_cmd(Host, Port,
-                                     [" -o UserKnownHostsFile=", KnownHosts,
+                                     [" -o UserKnownHostsFile=", "/dev/null",
                                       " -o CheckHostIP=no"
                                       " -o StrictHostKeyChecking=no"
                                       " -q"
@@ -330,10 +327,9 @@ tunnel_in_non_erlclient_erlserver(Config) ->
     ListenHost = {127,0,0,1},
     ListenPort = 2345,
 
-    KnownHosts = filename:join(UserDir, "known_hosts"),
     Cmd =
         ssh_test_lib:open_sshc_cmd(Host, Port,
-                                   [" -o UserKnownHostsFile=", KnownHosts,
+                                   [" -o UserKnownHostsFile=", "/dev/null",
                                     " -o CheckHostIP=no"
                                     " -o StrictHostKeyChecking=no"
                                     " -q"
@@ -369,8 +365,7 @@ tunnel_in_erlclient_erlserver(Config) ->
 
 %%--------------------------------------------------------------------
 tunnel_in_erlclient_openssh_server(_Config) ->
-    C = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-                                                 {user_interaction, false}]),
+    C = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ToSock, ToHost, ToPort} = tunneling_listner(),
     
     ListenHost = {127,0,0,1},
@@ -400,8 +395,7 @@ tunnel_out_erlclient_erlserver(Config) ->
 
 %%--------------------------------------------------------------------
 tunnel_out_erlclient_openssh_server(_Config) ->
-    C = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-                                                 {user_interaction, false}]),
+    C = ssh_test_lib:connect(?SSH_DEFAULT_PORT, []),
     {ToSock, ToHost, ToPort} = tunneling_listner(),
     
     ListenHost = {127,0,0,1},
@@ -534,9 +528,14 @@ extra_logout() ->
     end.
 
 %%%----------------------------------------------------------------
-no_forwarding() ->
+no_forwarding(Config) ->
     %%% Check if the ssh of the OS has tunneling enabled
-    Cmnd = "ssh -R 0:localhost:4567 localhost exit",
+    UserDir = proplists:get_value(priv_dir, Config),
+    Cmnd = ["ssh "
+            " -o UserKnownHostsFile=", "/dev/null",
+            " -o CheckHostIP=no"
+            " -o StrictHostKeyChecking=no"
+            " -R 0:localhost:4567 localhost exit"],
     FailRegExp =
         "Port forwarding is disabled"
         "|remote port forwarding failed"