diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 93243f29082a..052efceaa632 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -428,6 +428,7 @@ in
   cyrus-imap = runTest ./cyrus-imap.nix;
   dae = runTest ./dae.nix;
   darling-dmg = runTest ./darling-dmg.nix;
+  dashy = runTest ./web-apps/dashy.nix;
   davis = runTest ./davis.nix;
   db-rest = runTest ./db-rest.nix;
   dconf = runTest ./dconf.nix;
diff --git a/nixos/tests/web-apps/dashy.nix b/nixos/tests/web-apps/dashy.nix
new file mode 100644
index 000000000000..39454b5b8d8a
--- /dev/null
+++ b/nixos/tests/web-apps/dashy.nix
@@ -0,0 +1,75 @@
+{ pkgs, lib, ... }:
+let
+
+  customSettings = {
+    pageInfo = {
+      title = "My Custom Dashy Title";
+    };
+
+    sections = [
+      {
+        name = "My Section";
+        items = [
+          {
+            name = "NixOS";
+            url = "https://nixos.org";
+          }
+        ];
+      }
+    ];
+  };
+
+  customSettingsYaml = (pkgs.formats.yaml_1_1 { }).generate "custom-conf.yaml" customSettings;
+in
+{
+  name = "dashy";
+  meta.maintainers = [ lib.maintainers.therealgramdalf ];
+
+  defaults =
+    { config, ... }:
+    {
+      services.dashy = {
+        enable = true;
+        virtualHost = {
+          enableNginx = true;
+          domain = "dashy.local";
+        };
+      };
+
+      networking.extraHosts = "127.0.0.1 dashy.local";
+
+      services.nginx.virtualHosts."${config.services.dashy.virtualHost.domain}".listen = [
+        {
+          addr = "127.0.0.1";
+          port = 80;
+        }
+      ];
+    };
+  nodes = {
+    machine = { };
+
+    machine-custom = {
+      services.dashy.settings = customSettings;
+    };
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("nginx.service")
+    machine.wait_for_open_port(80)
+
+    actual = machine.succeed("curl -v --stderr - http://dashy.local/", timeout=10)
+    expected = "<title>Dashy</title>"
+    assert expected in actual, \
+      f"unexpected reply from Dashy, expected: '{expected}' got: '{actual}'"
+
+    machine_custom.wait_for_unit("nginx.service")
+    machine_custom.wait_for_open_port(80)
+
+    actual_custom = machine_custom.succeed("curl -s --stderr - http://dashy.local/conf.yml", timeout=10).strip()
+    expected_custom = machine_custom.succeed("cat ${customSettingsYaml}").strip()
+
+    assert expected_custom == actual_custom, \
+      f"unexpected reply from Dashy, expected: '{expected_custom}' got: '{actual_custom}'"
+  '';
+}
diff --git a/pkgs/by-name/da/dashy-ui/package.nix b/pkgs/by-name/da/dashy-ui/package.nix
index 4ee12f18c20b..7ff42949d6d0 100644
--- a/pkgs/by-name/da/dashy-ui/package.nix
+++ b/pkgs/by-name/da/dashy-ui/package.nix
@@ -8,6 +8,7 @@
   yarn,
   fixup-yarn-lock,
   prefetch-yarn-deps,
+  nixosTests,
   nodejs_20,
   nodejs-slim_20,
   remarshal_0_17,
@@ -26,6 +27,11 @@ stdenv.mkDerivation (finalAttrs: {
     yarnLock = finalAttrs.src + "/yarn.lock";
     hash = "sha256-r36w3Cz/V7E/xPYYpvfQsdk2QXfCVDYE9OxiFNyKP2s=";
   };
+
+  passthru.tests = {
+    dashy = nixosTests.dashy;
+  };
+
   # - If no settings are passed, use the default config provided by upstream
   # - Despite JSON being valid YAML (and the JSON passing the config validator),
   # there seem to be some issues with JSON in the final build - potentially due to