diff --git a/nixos/modules/services/networking/dnsmasq.nix b/nixos/modules/services/networking/dnsmasq.nix
index 877705641cf1..644e573f3bb9 100644
--- a/nixos/modules/services/networking/dnsmasq.nix
+++ b/nixos/modules/services/networking/dnsmasq.nix
@@ -118,6 +118,8 @@ in
       configFile = lib.mkOption {
         type = lib.types.package;
         readOnly = true;
+        default = dnsmasqConf;
+        defaultText = lib.literalExpression "Path of dnsmasq config file";
         description = ''
           Path to the configuration file of dnsmasq.
         '';
@@ -137,8 +139,6 @@ in
         conf-file = lib.mkDefault (lib.optional cfg.resolveLocalQueries "/etc/dnsmasq-conf.conf");
         resolv-file = lib.mkDefault (lib.optional cfg.resolveLocalQueries "/etc/dnsmasq-resolv.conf");
       };
-
-      configFile = dnsmasqConf;
     };
 
     networking.nameservers = lib.optional cfg.resolveLocalQueries "127.0.0.1";
diff --git a/nixos/tests/pihole-ftl/default.nix b/nixos/tests/pihole-ftl/default.nix
index 71c971174dca..6277037013a3 100644
--- a/nixos/tests/pihole-ftl/default.nix
+++ b/nixos/tests/pihole-ftl/default.nix
@@ -2,4 +2,5 @@
 
 {
   basic = runTest ./basic.nix;
+  dnsmasq = runTest ./dnsmasq.nix;
 }
diff --git a/nixos/tests/pihole-ftl/dnsmasq.nix b/nixos/tests/pihole-ftl/dnsmasq.nix
new file mode 100644
index 000000000000..66bd9bebb665
--- /dev/null
+++ b/nixos/tests/pihole-ftl/dnsmasq.nix
@@ -0,0 +1,20 @@
+let
+  port = "9077";
+in
+{
+  name = "pihole-ftl-dnsmasq";
+
+  nodes.machine = {
+    services.pihole-ftl = {
+      enable = true;
+      useDnsmasqConfig = true;
+      settings.webserver.port = port;
+    };
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("pihole-ftl.service")
+    machine.wait_for_open_port(${port})
+  '';
+}
diff --git a/pkgs/by-name/dn/dnsmasq/package.nix b/pkgs/by-name/dn/dnsmasq/package.nix
index 3b7699cf87c0..6a05a0b02e3e 100644
--- a/pkgs/by-name/dn/dnsmasq/package.nix
+++ b/pkgs/by-name/dn/dnsmasq/package.nix
@@ -106,6 +106,7 @@ stdenv.mkDerivation rec {
     inherit (nixosTests) dnscrypt-proxy;
     kubernetes-dns-single = nixosTests.kubernetes.dns-single-node;
     kubernetes-dns-multi = nixosTests.kubernetes.dns-multi-node;
+    pihole-ftl-dnsmasq = nixosTests.pihole-ftl.dnsmasq;
   };
 
   meta = with lib; {
diff --git a/pkgs/by-name/pi/pihole-ftl/package.nix b/pkgs/by-name/pi/pihole-ftl/package.nix
index 3e7d48e7393b..c6838e9ea700 100644
--- a/pkgs/by-name/pi/pihole-ftl/package.nix
+++ b/pkgs/by-name/pi/pihole-ftl/package.nix
@@ -77,8 +77,11 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  passthru.settingsTemplate = ./pihole.toml;
-  passthru.tests = nixosTests.pihole-ftl;
+  passthru = {
+    settingsTemplate = ./pihole.toml;
+
+    tests = nixosTests.pihole-ftl;
+  };
 
   meta = {
     description = "Pi-hole FTL engine";