diff --git a/pkgs/tools/text/difftastic/default.nix b/pkgs/tools/text/difftastic/default.nix
index 1bc18749c652..12ad1a764fb2 100644
--- a/pkgs/tools/text/difftastic/default.nix
+++ b/pkgs/tools/text/difftastic/default.nix
@@ -1,17 +1,19 @@
-{ lib, fetchFromGitHub, rustPlatform, tree-sitter }:
+{ lib, fetchFromGitHub, rustPlatform, tree-sitter, difftastic, testVersion }:
 
 rustPlatform.buildRustPackage rec {
   pname = "difftastic";
-  version = "0.26.0";
+  version = "0.26.3";
 
   src = fetchFromGitHub {
     owner = "wilfred";
     repo = pname;
     rev = version;
-    sha256 = "sha256-bluiRWueb9+UG+8jCwm+Xc483dSvoxwu+HP02I0DZBs=";
+    sha256 = "11qvl78dskhawmzjbff2cd4icwvlfhg8hzf1law5w5cr768zv7yn";
   };
 
-  cargoSha256 = "sha256-nVYPvYt3Sr1VxoXiaFhpiAh+vngklsr6vn1jfBUg4C4=";
+  cargoSha256 = "1kmwd9m94kl3j6ajfndr7rjx66fsqvnn2jh0m54ac5qd5r9hhdc8";
+
+  passthru.tests.version = testVersion { package = difftastic; };
 
   meta = with lib; {
     description = "A syntax-aware diff";