diff --git a/pkgs/development/python-modules/atpublic/default.nix b/pkgs/development/python-modules/atpublic/default.nix
index d4cb40b76dc..021d8e8b307 100644
--- a/pkgs/development/python-modules/atpublic/default.nix
+++ b/pkgs/development/python-modules/atpublic/default.nix
@@ -1,5 +1,9 @@
-{ lib, isPy3k, fetchPypi, buildPythonPackage
-, pytest }:
+{ lib, isPy3k, pythonOlder, fetchPypi, buildPythonPackage
+, pytest
+, pytestcov
+, sybil
+, typing-extensions
+}:
 
 buildPythonPackage rec {
   pname = "atpublic";
@@ -11,8 +15,12 @@ buildPythonPackage rec {
     sha256 = "ebeb62b71a5c683a84c1b16bbf415708af5a46841b142b85ac3a22ec2d7613b0";
   };
 
+  propagatedBuildInputs = lib.optionals (pythonOlder "3.8") [
+    typing-extensions
+  ];
+
   checkInputs = [
-    pytest
+    pytest pytestcov sybil
   ];
 
   checkPhase = ''