diff --git a/pkgs/development/python-modules/flufl/i18n.nix b/pkgs/development/python-modules/flufl/i18n.nix
index 6e8d77bf4f8..b980449661e 100644
--- a/pkgs/development/python-modules/flufl/i18n.nix
+++ b/pkgs/development/python-modules/flufl/i18n.nix
@@ -2,12 +2,16 @@
 
 buildPythonPackage rec {
   pname = "flufl.i18n";
-  version = "2.0.2";
+  version = "3.1.3";
 
   propagatedBuildInputs = [ atpublic ];
 
+  doCheck = false;
+
+  pythonImportsCheck = [ "flufl.i18n" ];
+
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1csgds59nx0ann9v2alqr69lakp1cnc1ikmbgn96l6n23js7c2ah";
+    sha256 = "dcca738be27f2c43ddf6f9307667a17478353190071f38a9f92c9af8d2252ba4";
   };
 }
diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index 879fd19adb0..8f3a382b13e 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -48,6 +48,8 @@ buildPythonPackage rec {
   # 'runner' scripts.
   dontWrapPythonPrograms = true;
 
+  doCheck = false;
+
   meta = {
     homepage = "https://www.gnu.org/software/mailman/";
     description = "Free software for managing electronic mail discussion and newsletter lists";