diff --git a/pkgs/development/python-modules/pylink-square/default.nix b/pkgs/development/python-modules/pylink-square/default.nix
index fb88358c0be1..117628ec4283 100644
--- a/pkgs/development/python-modules/pylink-square/default.nix
+++ b/pkgs/development/python-modules/pylink-square/default.nix
@@ -13,18 +13,19 @@
   # tests
   mock,
   pytestCheckHook,
+  pyocd,
 }:
 
 buildPythonPackage rec {
   pname = "pylink-square";
-  version = "2.0.0";
+  version = "1.6.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "square";
     repo = "pylink";
     tag = "v${version}";
-    hash = "sha256-QitJGJGgXeSl5RaYW6+VtwOrV9AYDA9+kUHNtopDgVc=";
+    hash = "sha256-rkkdnpkl9UHcBDjp6lsFXR1zNn7tH1KeTQ7wV+yJ3m0=";
   };
 
   patches = [
@@ -53,6 +54,10 @@ buildPythonPackage rec {
     "test_set_log_file_success"
   ];
 
+  passthru.tests = {
+    inherit pyocd;
+  };
+
   meta = {
     description = "Python interface for the SEGGER J-Link";
     homepage = "https://github.com/square/pylink";