diff --git a/pkgs/development/python-modules/aioresponses/default.nix b/pkgs/development/python-modules/aioresponses/default.nix
index 6a0d69371a8..2a3a2e60be7 100644
--- a/pkgs/development/python-modules/aioresponses/default.nix
+++ b/pkgs/development/python-modules/aioresponses/default.nix
@@ -1,22 +1,22 @@
 { lib
-, buildPythonPackage
-, fetchPypi
-, pythonOlder
-, pbr
 , aiohttp
-, ddt
 , asynctest
-, pytest
+, buildPythonPackage
+, ddt
+, fetchPypi
+, pbr
+, pytestCheckHook
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "aioresponses";
-  version = "0.7.1";
+  version = "0.7.2";
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f65bba2be1e9a4997ee166bc0161a50be0fef7350ad09e6afdb2adccf74dfefe";
+    sha256 = "sha256-guSV0Ri3SJaqW01H4X7/teLMeD5RCuOVzq3l6Hyr6Jo=";
   };
 
   nativeBuildInputs = [
@@ -30,13 +30,16 @@ buildPythonPackage rec {
   checkInputs = [
     asynctest
     ddt
-    pytest
+    pytestCheckHook
   ];
 
-  # Skip a test which makes requests to httpbin.org
-  checkPhase = ''
-    pytest -k "not (test_address_as_instance_of_url_combined_with_pass_through or test_pass_through_with_origin_params)"
-  '';
+  disabledTests = [
+    # Skip a test which makes requests to httpbin.org
+    "test_address_as_instance_of_url_combined_with_pass_through"
+    "test_pass_through_with_origin_params"
+  ];
+
+  pythonImportsCheck = [ "aioresponses" ];
 
   meta = {
     description = "A helper to mock/fake web requests in python aiohttp package";
diff --git a/pkgs/development/python-modules/asdf/default.nix b/pkgs/development/python-modules/asdf/default.nix
index 19c1921f7c7..33513b2289c 100644
--- a/pkgs/development/python-modules/asdf/default.nix
+++ b/pkgs/development/python-modules/asdf/default.nix
@@ -1,54 +1,55 @@
 { lib
+, astropy
 , buildPythonPackage
 , fetchPypi
-, pytest-astropy
-, semantic-version
-, pyyaml
 , jsonschema
-, six
 , numpy
-, isPy27
-, astropy
-, setuptools_scm
-, setuptools
+, packaging
+, pytest-astropy
+, pytestCheckHook
+, pythonOlder
+, pyyaml
+, semantic-version
+, setuptools-scm
 }:
 
 buildPythonPackage rec {
   pname = "asdf";
-  version = "2.7.1";
-  disabled = isPy27;
+  version = "2.7.3";
+  disabled = pythonOlder "3.6";
   format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "4ba2e31cb24b974a10dfae3edee23db2e6bea2d00608604d062366aa3af6e81a";
+    sha256 = "11dyr295wn5m2pcynlwj7kgw9xr66msfvwn1m6a5vv13vzj19spp";
   };
 
+  nativeBuildInputs = [ setuptools-scm ];
+
+  propagatedBuildInputs = [
+    jsonschema
+    numpy
+    packaging
+    pyyaml
+    semantic-version
+  ];
+
   checkInputs = [
     pytest-astropy
     astropy
+    pytestCheckHook
   ];
 
-  propagatedBuildInputs = [
-    semantic-version
-    pyyaml
-    jsonschema
-    six
-    numpy
-    setuptools_scm
-    setuptools
-  ];
-
-  checkPhase = ''
-    PY_IGNORE_IMPORTMISMATCH=1 pytest
+  preCheck = ''
+    export PY_IGNORE_IMPORTMISMATCH=1
   '';
 
+  pythonImportsCheck = [ "asdf" ];
+
   meta = with lib; {
     description = "Python tools to handle ASDF files";
     homepage = "https://github.com/spacetelescope/asdf";
     license = licenses.bsd3;
     maintainers = [ maintainers.costrouc ];
-    # many ValueError in tests
-    broken = true;
   };
 }