python310Packages.graphql-server-core: remove pseudo black test, little cleanup

pkgs/development/python-modules/graphql-server-core/default.nix

@@ -1,16 +1,17 @@
 { buildPythonPackage
 , fetchFromGitHub
 , lib
-, black
 , graphql-core
 , promise
 , fetchpatch
 , pythonOlder
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "graphql-server-core";
   version = "2.0.0";
+  disable = pythonOlder "3.6";
 
   src = fetchFromGitHub {
     owner = "graphql-python";
@@ -19,8 +20,6 @@ buildPythonPackage rec {
     sha256 = "1w3biv2za2m1brwjy0z049c2m94gm1zfwxzgc6lwrsci724jv9fr";
   };
 
-  disable = pythonOlder "3.6";
-
   patches = [
     (fetchpatch {
       url = "https://github.com/graphql-python/graphql-server-core/commit/865ee9d5602f352c958f6f7e15adbe9abe216784.patch";
@@ -33,18 +32,17 @@ buildPythonPackage rec {
     promise
   ];
 
-  checkPhase = "black --check graphql_server tests";
+  # fail with: cannot import name 'format_error' from 'graphql'
+  doCheck = false;
 
   checkInputs = [
-    black
+    pytestCheckHook
   ];
 
   meta = with lib; {
     description = "Core package for using GraphQL in a custom server easily";
     homepage = "https://github.com/graphql-python/graphql-server-core";
     license = licenses.mit;
-    maintainers = with maintainers; [
-      kamadorueda
-    ];
+    maintainers = with maintainers; [ kamadorueda ];
   };
 }