diff --git a/pkgs/development/python-modules/aresponses/default.nix b/pkgs/development/python-modules/aresponses/default.nix
index 56093192d6c..2407adefd5c 100644
--- a/pkgs/development/python-modules/aresponses/default.nix
+++ b/pkgs/development/python-modules/aresponses/default.nix
@@ -1,23 +1,24 @@
 { lib
-, buildPythonPackage
-, fetchPypi
-# propagatedBuildInputs
 , aiohttp
-# buildInputs
+, buildPythonPackage
+, fetchFromGitHub
+, isPy3k
 , pytest
 , pytest-asyncio
-, isPy3k
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "aresponses";
-  version = "2.0.0";
+  version = "2.1.0";
 
   disabled = !isPy3k;
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "58693a6b715edfa830a20903ee1d1b2a791251923f311b3bebf113e8ff07bb35";
+  src = fetchFromGitHub {
+    owner = "CircleUp";
+    repo = pname;
+    rev = version;
+    sha256 = "0dc1y4s6kpmr0ar63kkyghvisgbmb8qq5wglmjclrpzd5180mjcl";
   };
 
   propagatedBuildInputs = [
@@ -29,13 +30,24 @@ buildPythonPackage rec {
     pytest-asyncio
   ];
 
-  # tests only distributed via git repository, not pypi
-  doCheck = false;
+  checkInputs = [
+    aiohttp
+    pytestCheckHook
+    pytest-asyncio
+  ];
+
+  # Disable tests which requires network access
+  disabledTests = [
+    "test_foo"
+    "test_passthrough"
+  ];
+
+  pythonImportsCheck = [ "aresponses" ];
 
   meta = with lib; {
     description = "Asyncio testing server";
     homepage = "https://github.com/circleup/aresponses";
     license = licenses.mit;
-    maintainers = [ maintainers.makefu ];
+    maintainers = with maintainers; [ makefu ];
   };
 }
diff --git a/pkgs/development/python-modules/pyipp/default.nix b/pkgs/development/python-modules/pyipp/default.nix
index 98bb6360ce5..ed5a5f4576a 100644
--- a/pkgs/development/python-modules/pyipp/default.nix
+++ b/pkgs/development/python-modules/pyipp/default.nix
@@ -1,11 +1,18 @@
-{ lib, buildPythonPackage, fetchFromGitHub, isPy27
-, aiohttp, deepmerge, yarl
-, aresponses, pytest, pytest-asyncio, pytestcov }:
+{ lib
+, aiohttp
+, aresponses
+, buildPythonPackage
+, deepmerge
+, fetchFromGitHub
+, pytest-asyncio
+, pytestCheckHook
+, pytestcov
+, yarl
+}:
 
 buildPythonPackage rec {
   pname = "pyipp";
   version = "0.11.0";
-  disabled = isPy27;
 
   src = fetchFromGitHub {
    owner = "ctalkington";
@@ -22,14 +29,26 @@ buildPythonPackage rec {
 
   checkInputs = [
     aresponses
-    pytest
     pytest-asyncio
     pytestcov
+    pytestCheckHook
   ];
 
-  checkPhase = ''
-    pytest -q .
-  '';
+  # Some tests are failing due to encoding issues
+  # https://github.com/ctalkington/python-ipp/issues/121
+  disabledTests = [
+    "test_internal_session"
+    "test_request_port"
+    "est_http_error426"
+    "test_unexpected_response"
+    "test_printer"
+    "test_raw"
+    "test_ipp_request"
+    "test_request_tls"
+    "test_ipp_error_0x0503"
+  ];
+
+  pythonImportsCheck = [ "pyipp" ];
 
   meta = with lib; {
     description = "Asynchronous Python client for Internet Printing Protocol (IPP)";