diff --git a/pkgs/development/python-modules/pdfminer_six/default.nix b/pkgs/development/python-modules/pdfminer_six/default.nix
index 57023e786f0..18fb09acb61 100644
--- a/pkgs/development/python-modules/pdfminer_six/default.nix
+++ b/pkgs/development/python-modules/pdfminer_six/default.nix
@@ -1,21 +1,23 @@
-{ stdenv, buildPythonPackage, python, fetchFromGitHub, six, pycryptodome, chardet, nose, pytest, sortedcontainers }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, six, pycryptodome, chardet, nose, sortedcontainers }:
 
 buildPythonPackage rec {
   pname = "pdfminer_six";
-  version = "20181108";
+  version = "20191020";
 
+  # No tests in PyPi Tarball
   src = fetchFromGitHub {
     owner = "pdfminer";
     repo = "pdfminer.six";
     rev = version;
-    sha256 = "1v8pcx43fgidv1g54s92k85anvcss08blkhm4yi1hn1ybl0mmw6c";
+    sha256 = "1fqn4ilcscvw6ws9a1yqiprha9d3rgw3d0280clkbk6s4l26wm9h";
   };
 
-  propagatedBuildInputs = [ six pycryptodome chardet sortedcontainers ];
+  propagatedBuildInputs = [ six pycryptodome sortedcontainers ]
+    ++ stdenv.lib.optionals isPy3k [ chardet ];
 
-  checkInputs = [ nose pytest ];
+  checkInputs = [ nose ];
   checkPhase = ''
-    ${python.interpreter} -m pytest
+    nosetests
   '';
 
   meta = with stdenv.lib; {