diff --git a/pkgs/development/python-modules/pytz/default.nix b/pkgs/development/python-modules/pytz/default.nix
index dab8f479c04..1a1e1585d28 100644
--- a/pkgs/development/python-modules/pytz/default.nix
+++ b/pkgs/development/python-modules/pytz/default.nix
@@ -2,17 +2,19 @@
 
 buildPythonPackage rec {
   pname = "pytz";
-  version = "2020.5";
+  version = "2021.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "180befebb1927b16f6b57101720075a984c019ac16b1b7575673bea42c6c3da5";
+    sha256 = "sha256-g6SpCJS/OOJDzwUsi1jzgb/pp6SD9qnKsUC8f3AqxNo=";
   };
 
   checkPhase = ''
     ${python.interpreter} -m unittest discover -s pytz/tests
   '';
 
+  pythonImportsCheck = [ "pytz" ];
+
   meta = with lib; {
     description = "World timezone definitions, modern and historical";
     homepage = "https://pythonhosted.org/pytz";