diff --git a/pkgs/development/python-modules/isort/default.nix b/pkgs/development/python-modules/isort/default.nix
index 1195f0f6b097..b55fb9156814 100644
--- a/pkgs/development/python-modules/isort/default.nix
+++ b/pkgs/development/python-modules/isort/default.nix
@@ -6,17 +6,16 @@
 , pytestCheckHook
 }:
 
-let
-in buildPythonPackage rec {
+buildPythonPackage rec {
   pname = "isort";
-  version = "5.6.4";
+  version = "5.9.3";
   format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "PyCQA";
     repo = "isort";
     rev = version;
-    sha256 = "1m7jpqssnbsn1ydrw1dn7nrcrggqcvj9v6mk5ampxmvk94xd2r2q";
+    sha256 = "sha256-JbRZ/3Xz35tGoCNnQesR08Sjoz3yimxZyxhhOXGvmXw=";
   };
 
   nativeBuildInputs = [
@@ -46,6 +45,7 @@ in buildPythonPackage rec {
   '';
 
   pytestFlagsArray = [
+    "--ignore=tests/benchmark/" # requires pytest-benchmark
     "--ignore=tests/integration/" # pulls in 10 other packages
     "--ignore=tests/unit/profiles/test_black.py" # causes infinite recursion to include black
   ];
@@ -63,6 +63,7 @@ in buildPythonPackage rec {
     # plugin not available
     "test_isort_literals_issue_1358"
     "test_isort_supports_formatting_plugins_issue_1353"
+    "test_sort_configurable_sort_issue_1732"
     "test_value_assignment_list"
     # profiles not available
     "test_isort_supports_shared_profiles_issue_970"