diff --git a/pkgs/development/python-modules/chex/default.nix b/pkgs/development/python-modules/chex/default.nix
index d312d1114e28..8031710aad91 100644
--- a/pkgs/development/python-modules/chex/default.nix
+++ b/pkgs/development/python-modules/chex/default.nix
@@ -23,14 +23,14 @@
 
 buildPythonPackage rec {
   pname = "chex";
-  version = "0.1.88";
+  version = "0.1.89";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "deepmind";
     repo = "chex";
     tag = "v${version}";
-    hash = "sha256-umRq+FZwyx1hz839ZibRTEFKjbBugrfUJuE8PagjqI4=";
+    hash = "sha256-eTEfmbpmwtCuphtOq0iHUT8zGfyQ4/aUorL4FQwcKBw=";
   };
 
   build-system = [ setuptools ];
@@ -52,11 +52,6 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  # AttributeError: module 'unittest' has no attribute 'makeSuite'
-  # https://github.com/google-deepmind/chex/issues/371
-  # TODO: re-enable at next release
-  doCheck = pythonOlder "3.13";
-
   meta = {
     description = "Library of utilities for helping to write reliable JAX code";
     homepage = "https://github.com/deepmind/chex";