diff --git a/pkgs/development/python-modules/blessed/default.nix b/pkgs/development/python-modules/blessed/default.nix
index 659f3523d5b3..82c357dfdb8a 100644
--- a/pkgs/development/python-modules/blessed/default.nix
+++ b/pkgs/development/python-modules/blessed/default.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   fetchFromGitHub,
   flit-core,
@@ -41,6 +42,11 @@ buildPythonPackage {
     rm tox.ini
   '';
 
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
+    # Fail with several AssertionError
+    "tests/test_sixel.py"
+  ];
+
   meta = {
     homepage = "https://github.com/jquast/blessed";
     description = "Thin, practical wrapper around terminal capabilities in Python";
diff --git a/pkgs/development/python-modules/chalice/default.nix b/pkgs/development/python-modules/chalice/default.nix
index bf543b4d6eac..e949afd1320a 100644
--- a/pkgs/development/python-modules/chalice/default.nix
+++ b/pkgs/development/python-modules/chalice/default.nix
@@ -1,24 +1,26 @@
 {
   lib,
-  attrs,
-  botocore,
   buildPythonPackage,
-  click,
   fetchFromGitHub,
-  hypothesis,
+  pythonAtLeast,
+
+  # build-system
+  setuptools,
+
+  # dependencies
+  botocore,
+  click,
   inquirer,
   jmespath,
-  mypy-extensions,
   pip,
-  pytestCheckHook,
   pyyaml,
-  requests,
-  setuptools,
   six,
-  typing-extensions,
-  watchdog,
+
+  # tests
+  hypothesis,
+  pytestCheckHook,
+  requests,
   websocket-client,
-  wheel,
 }:
 
 buildPythonPackage rec {
@@ -26,6 +28,8 @@ buildPythonPackage rec {
   version = "1.32.0";
   pyproject = true;
 
+  disabled = pythonAtLeast "3.14";
+
   src = fetchFromGitHub {
     owner = "aws";
     repo = "chalice";
@@ -42,9 +46,8 @@ buildPythonPackage rec {
     jmespath
     pip
     pyyaml
-    setuptools
+    # setuptools
     six
-    wheel
   ];
 
   nativeCheckInputs = [
@@ -79,6 +82,8 @@ buildPythonPackage rec {
     "test_setup_tar_gz_hyphens_in_name"
     "test_both_tar_gz"
     "test_both_tar_bz2"
+    # AssertionError
+    "test_no_error_message_printed_on_empty_reqs_file"
   ];
 
   pythonImportsCheck = [ "chalice" ];