diff --git a/pkgs/development/python-modules/typeguard/default.nix b/pkgs/development/python-modules/typeguard/default.nix
index da75b7f18dca..7541d717e8a9 100644
--- a/pkgs/development/python-modules/typeguard/default.nix
+++ b/pkgs/development/python-modules/typeguard/default.nix
@@ -4,6 +4,7 @@
 , stdenv
 , setuptools_scm
 , pytest
+, typing-extensions
 , glibcLocales
 }:
 
@@ -25,7 +26,7 @@ buildPythonPackage rec {
     substituteInPlace setup.cfg --replace " --cov" ""
   '';
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest typing-extensions ];
 
   checkPhase = ''
     py.test .