diff --git a/pkgs/by-name/fi/fishnet/package.nix b/pkgs/by-name/fi/fishnet/package.nix
index 77149af5d26c..faf4a244057f 100644
--- a/pkgs/by-name/fi/fishnet/package.nix
+++ b/pkgs/by-name/fi/fishnet/package.nix
@@ -1,7 +1,10 @@
-{ lib
-, rustPlatform
-, fetchFromGitHub
-, fetchurl
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+  fetchurl,
+  testers,
+  fishnet,
 }:
 
 let
@@ -16,7 +19,8 @@ let
     url = "https://tests.stockfishchess.org/api/nn/${nnueSmallFile}";
     sha256 = "sha256-N/GPYtdy8xB+HWqso4mMEww8hvKrY+ZVX7vKIGNaiZ0=";
   };
-in rustPlatform.buildRustPackage rec {
+in
+rustPlatform.buildRustPackage rec {
   pname = "fishnet";
   version = "2.9.4";
 
@@ -37,12 +41,22 @@ in rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-HuVEg8uJ1WbXzYaXCPBobmxhbhk+X8D/xFcM2wE8Lh0=";
 
+  passthru.tests.version = testers.testVersion {
+    package = fishnet;
+  };
+
   meta = with lib; {
     description = "Distributed Stockfish analysis for lichess.org";
     homepage = "https://github.com/lichess-org/fishnet";
     license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ tu-maurice thibaultd ];
-    platforms = [ "aarch64-linux" "x86_64-linux" ];
+    maintainers = with maintainers; [
+      tu-maurice
+      thibaultd
+    ];
+    platforms = [
+      "aarch64-linux"
+      "x86_64-linux"
+    ];
     mainProgram = "fishnet";
   };
 }