diff --git a/pkgs/development/python-modules/freezegun/0.3.nix b/pkgs/development/python-modules/freezegun/0.3.nix
index 09ce8bbd11b..a83a432d89d 100644
--- a/pkgs/development/python-modules/freezegun/0.3.nix
+++ b/pkgs/development/python-modules/freezegun/0.3.nix
@@ -11,17 +11,15 @@
 
 buildPythonPackage rec {
   pname = "freezegun";
-  version = "0.3.5";
+  version = "0.3.15";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02ly89wwn0plcw8clkkzvxaw6zlpm8qyqpm9x2mfw4a0vppb4ngf";
+    sha256 = "e2062f2c7f95cc276a834c22f1a17179467176b624cc6f936e8bc3be5535ad1b";
   };
 
   propagatedBuildInputs = [ dateutil six ];
   checkInputs = [ mock nose pytest ];
-  # contains python3 specific code
-  doCheck = !isPy27;
 
   meta = with lib; {
     description = "FreezeGun: Let your Python tests travel through time";
diff --git a/pkgs/development/python-modules/freezegun/default.nix b/pkgs/development/python-modules/freezegun/default.nix
index 4c5a87e8266..00d03435de9 100644
--- a/pkgs/development/python-modules/freezegun/default.nix
+++ b/pkgs/development/python-modules/freezegun/default.nix
@@ -2,28 +2,22 @@
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
-, isPy27
 , dateutil
-, six
-, mock
-, nose
-, pytest
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "freezegun";
-  version = "1.0.0";
+  version = "1.1.0";
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1cf08e441f913ff5e59b19cc065a8faa9dd1ddc442eaf0375294f344581a0643";
+    sha256 = "177f9dd59861d871e27a484c3332f35a6e3f5d14626f2bf91be37891f18927f3";
   };
 
-  propagatedBuildInputs = [ dateutil six ];
-  checkInputs = [ mock nose pytest ];
-  # contains python3 specific code
-  doCheck = !isPy27;
+  propagatedBuildInputs = [ dateutil ];
+  checkInputs = [ pytestCheckHook ];
 
   meta = with lib; {
     description = "FreezeGun: Let your Python tests travel through time";
diff --git a/pkgs/development/python-modules/pytest-freezegun/default.nix b/pkgs/development/python-modules/pytest-freezegun/default.nix
index 424d8fde232..e5fbb6bb070 100644
--- a/pkgs/development/python-modules/pytest-freezegun/default.nix
+++ b/pkgs/development/python-modules/pytest-freezegun/default.nix
@@ -1,18 +1,21 @@
 { lib
 , buildPythonPackage
-, fetchPypi
+, isPy27
+, fetchFromGitHub
 , freezegun
 , pytest
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "pytest-freezegun";
   version = "0.4.2";
 
-  src = fetchPypi {
-    inherit pname version;
-    extension = "zip";
-    sha256 = "19c82d5633751bf3ec92caa481fb5cffaac1787bd485f0df6436fd6242176949";
+  src = fetchFromGitHub {
+    owner = "ktosiek";
+    repo = "pytest-freezegun";
+    rev = version;
+    sha256 = "10c4pbh03b4s1q8cjd75lr0fvyf9id0zmdk29566qqsmaz28npas";
   };
 
   propagatedBuildInputs = [
@@ -20,6 +23,10 @@ buildPythonPackage rec {
     pytest
   ];
 
+  checkInputs = [
+    pytestCheckHook
+  ];
+
   meta = with lib; {
     description = "Wrap tests with fixtures in freeze_time";
     homepage = "https://github.com/ktosiek/pytest-freezegun";
diff --git a/pkgs/development/python-modules/virtualenv/default.nix b/pkgs/development/python-modules/virtualenv/default.nix
index 233101728f8..8b64bddc5a4 100644
--- a/pkgs/development/python-modules/virtualenv/default.nix
+++ b/pkgs/development/python-modules/virtualenv/default.nix
@@ -1,18 +1,25 @@
 { buildPythonPackage
-, fetchPypi
-, lib
-, stdenv
-, pythonOlder
-, isPy27
 , appdirs
 , contextlib2
+, cython
 , distlib
+, fetchPypi
 , filelock
+, fish
+, flaky
 , importlib-metadata
 , importlib-resources
+, isPy27
+, lib
 , pathlib2
+, pytest-freezegun
+, pytest-mock
+, pytest-timeout
+, pytestCheckHook
+, pythonOlder
 , setuptools_scm
 , six
+, stdenv
 }:
 
 buildPythonPackage rec {
@@ -47,10 +54,37 @@ buildPythonPackage rec {
     ./0001-Check-base_prefix-and-base_exec_prefix-for-Python-2.patch
   ];
 
-  meta = {
+  checkInputs = [
+    cython
+    fish
+    flaky
+    pytest-freezegun
+    pytest-mock
+    pytest-timeout
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    export HOME=$(mktemp -d)
+  '';
+
+  # Ignore tests which require network access
+  disabledTestFiles = [
+    "tests/unit/create/test_creator.py"
+    "tests/unit/seed/embed/test_bootstrap_link_via_app_data.py"
+  ];
+
+  disabledTests = [
+    "test_can_build_c_extensions"
+    "test_xonsh" # imports xonsh, which is not in pythonPackages
+  ];
+
+  pythonImportsCheck = [ "virtualenv" ];
+
+  meta = with lib; {
     description = "A tool to create isolated Python environments";
     homepage = "http://www.virtualenv.org";
-    license = lib.licenses.mit;
-    maintainers = with lib.maintainers; [ goibhniu ];
+    license = licenses.mit;
+    maintainers = with maintainers; [ goibhniu ];
   };
 }