diff --git a/pkgs/development/python-modules/pylti/default.nix b/pkgs/development/python-modules/pylti/default.nix
index 32cef1e5da8..40b639925a0 100644
--- a/pkgs/development/python-modules/pylti/default.nix
+++ b/pkgs/development/python-modules/pylti/default.nix
@@ -17,6 +17,7 @@
 , pytestpep8
 , sphinx
 , mock
+, chalice
 , isPy27
 }:
 
@@ -34,7 +35,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ httplib2 oauth oauth2 semantic-version ];
   checkInputs = [
     flask httpretty oauthlib pyflakes pytest pytestcache pytestcov covCore
-    pytestflakes pytestpep8 sphinx mock
+    pytestflakes pytestpep8 sphinx mock chalice
   ];
 
   src = fetchPypi {
@@ -48,4 +49,4 @@ buildPythonPackage rec {
     license = lib.licenses.bsdOriginal;
     maintainers = with lib.maintainers; [ layus ];
   };
-}
\ No newline at end of file
+}