diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 640cc84c8032..3c10d6215186 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -103,6 +103,7 @@ in
   etcd = handleTestOn ["x86_64-linux"] ./etcd.nix {};
   etcd-cluster = handleTestOn ["x86_64-linux"] ./etcd-cluster.nix {};
   fancontrol = handleTest ./fancontrol.nix {};
+  fcitx = handleTest ./fcitx {};
   ferm = handleTest ./ferm.nix {};
   firefox = handleTest ./firefox.nix {};
   firefox-esr = handleTest ./firefox.nix { esr = true; };
diff --git a/nixos/tests/fcitx/config b/nixos/tests/fcitx/config
new file mode 100644
index 000000000000..169768994e28
--- /dev/null
+++ b/nixos/tests/fcitx/config
@@ -0,0 +1,12 @@
+[Hotkey]
+SwitchKey=Disabled
+IMSwitchHotkey=ALT_SHIFT
+TimeInterval=240
+
+[Program]
+DelayStart=5
+
+[Output]
+
+[Appearance]
+
diff --git a/nixos/tests/fcitx/default.nix b/nixos/tests/fcitx/default.nix
new file mode 100644
index 000000000000..d28a5801f97f
--- /dev/null
+++ b/nixos/tests/fcitx/default.nix
@@ -0,0 +1,142 @@
+import ../make-test-python.nix ( 
+  {
+    pkgs, ...
+  }: 
+    # copy_from_host works only for store paths
+    rec {
+        name = "fcitx";
+        machine = 
+        { 
+          pkgs, 
+          ... 
+        }: 
+          {
+            virtualisation.memorySize = 1024;
+
+            imports = [
+              ../common/user-account.nix
+            ];
+
+            environment.systemPackages = [
+              # To avoid clashing with xfce4-terminal
+              pkgs.alacritty 
+            ];
+
+
+            services.xserver = 
+            {
+              enable = true;
+
+              displayManager = {
+                lightdm.enable = true;
+                autoLogin = {
+                  enable = true;
+                  user = "alice";
+                };
+              };
+
+              desktopManager.xfce.enable = true;
+            };
+              
+            i18n = {
+              inputMethod = {
+                enabled = "fcitx";
+                fcitx.engines = [
+                  pkgs.fcitx-engines.m17n
+                  pkgs.fcitx-engines.table-extra
+                ];
+              };
+            };
+          }
+        ;
+
+        testScript = { nodes, ... }: 
+        let 
+            user = nodes.machine.config.users.users.alice;
+            userName      = user.name;
+            userHome      = user.home;
+            xauth         = "${userHome}/.Xauthority";
+            fcitx_confdir = "${userHome}/.config/fcitx";
+        in 
+        ''
+            # We need config files before login session
+            # So copy first thing
+
+            # Point and click would be expensive,
+            # So configure using files
+            machine.copy_from_host(
+                "${./profile}",
+                "${fcitx_confdir}/profile",
+            )
+            machine.copy_from_host(
+                "${./config}",
+                "${fcitx_confdir}/config",
+            )
+
+            start_all()
+
+            machine.wait_for_file("${xauth}")
+            machine.succeed("xauth merge ${xauth}")
+
+            machine.sleep(5)
+
+            machine.succeed("su - ${userName} -c 'alacritty&'")
+            machine.succeed("su - ${userName} -c 'fcitx&'")
+            machine.sleep(10)
+
+            ### Type on terminal
+            machine.send_chars("echo ")
+            machine.sleep(1)
+
+            ### Start fcitx Unicode input
+            machine.send_key("ctrl-alt-shift-u")
+            machine.sleep(5)
+            machine.sleep(1)
+            
+            ### Search for smiling face
+            machine.send_chars("smil")
+            machine.sleep(1)
+
+            ### Navigate to the second one
+            machine.send_key("tab")
+            machine.sleep(1)
+
+            ### Choose it
+            machine.send_key("\n")
+            machine.sleep(1)
+
+            ### Start fcitx language input
+            machine.send_key("ctrl-spc")
+            machine.sleep(1)
+
+            ### Default zhengma, enter 一下
+            machine.send_chars("a2")
+            machine.sleep(1)
+
+            ### Switch to Harvard Kyoto
+            machine.send_key("alt-shift")
+            machine.sleep(1)
+
+            ### Enter क
+            machine.send_chars("ka ")
+            machine.sleep(1)
+
+            machine.send_key("alt-shift")
+            machine.sleep(1)
+
+            ### Turn off Fcitx
+            machine.send_key("ctrl-spc")
+            machine.sleep(1)
+
+            ### Redirect typed characters to a file
+            machine.send_chars(" > fcitx_test.out\n")
+            machine.sleep(1)
+            machine.screenshot("terminal_chars")
+
+            ### Verify that file contents are as expected
+            file_content = machine.succeed("cat ${userHome}/fcitx_test.out")
+            assert file_content == "☺一下क\n"
+            ''
+    ;
+  }
+)
diff --git a/nixos/tests/fcitx/profile b/nixos/tests/fcitx/profile
new file mode 100644
index 000000000000..77497a1496bd
--- /dev/null
+++ b/nixos/tests/fcitx/profile
@@ -0,0 +1,4 @@
+[Profile]
+IMName=zhengma-large
+EnabledIMList=fcitx-keyboard-us:True,zhengma-large:True,m17n_sa_harvard-kyoto:True
+PreeditStringInClientWindow=False