diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index df2b65173510..847b8bb5f0cc 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -517,6 +517,7 @@ in {
   #logstash = handleTest ./logstash.nix {};
   lomiri = handleTest ./lomiri.nix {};
   lomiri-calculator-app = runTest ./lomiri-calculator-app.nix;
+  lomiri-clock-app = runTest ./lomiri-clock-app.nix;
   lomiri-filemanager-app = runTest ./lomiri-filemanager-app.nix;
   lomiri-system-settings = handleTest ./lomiri-system-settings.nix {};
   lorri = handleTest ./lorri/default.nix {};
diff --git a/nixos/tests/lomiri-clock-app.nix b/nixos/tests/lomiri-clock-app.nix
new file mode 100644
index 000000000000..e68b89def534
--- /dev/null
+++ b/nixos/tests/lomiri-clock-app.nix
@@ -0,0 +1,48 @@
+{ pkgs, lib, ... }:
+{
+  name = "lomiri-clock-app-standalone";
+  meta.maintainers = lib.teams.lomiri.members;
+
+  nodes.machine =
+    { config, pkgs, ... }:
+    {
+      imports = [ ./common/x11.nix ];
+
+      services.xserver.enable = true;
+
+      environment = {
+        systemPackages = with pkgs.lomiri; [
+          suru-icon-theme
+          lomiri-clock-app
+        ];
+        variables = {
+          UITK_ICON_THEME = "suru";
+        };
+      };
+
+      i18n.supportedLocales = [ "all" ];
+
+      fonts.packages = with pkgs; [
+        # Intended font & helps with OCR
+        ubuntu_font_family
+      ];
+    };
+
+  enableOCR = true;
+
+  testScript = ''
+    machine.wait_for_x()
+
+    with subtest("lomiri clock launches"):
+        machine.execute("lomiri-clock-app >&2 &")
+        machine.wait_for_text(r"(clock.ubports|City|Alarms)")
+        machine.screenshot("lomiri-clock_open")
+
+    machine.succeed("pkill -f lomiri-clock-app")
+
+    with subtest("lomiri clock localisation works"):
+        machine.execute("env LANG=de_DE.UTF-8 lomiri-clock-app >&2 &")
+        machine.wait_for_text(r"(Stadt|Weckzeiten)")
+        machine.screenshot("lomiri-clock_localised")
+  '';
+}
diff --git a/pkgs/desktops/lomiri/applications/lomiri-clock-app/default.nix b/pkgs/desktops/lomiri/applications/lomiri-clock-app/default.nix
index cd380838bb99..6c9fbc474ebd 100644
--- a/pkgs/desktops/lomiri/applications/lomiri-clock-app/default.nix
+++ b/pkgs/desktops/lomiri/applications/lomiri-clock-app/default.nix
@@ -4,6 +4,7 @@
   fetchFromGitLab,
   fetchpatch,
   gitUpdater,
+  nixosTests,
   cmake,
   content-hub,
   geonames,
@@ -204,6 +205,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   passthru = {
+    tests.vm = nixosTests.lomiri-clock-app;
     updateScript = gitUpdater { rev-prefix = "v"; };
   };