diff --git a/pkgs/development/python-modules/cherrypy/default.nix b/pkgs/development/python-modules/cherrypy/default.nix
index d9b9d7d4687e..8c437d8cfb32 100644
--- a/pkgs/development/python-modules/cherrypy/default.nix
+++ b/pkgs/development/python-modules/cherrypy/default.nix
@@ -65,6 +65,10 @@ buildPythonPackage rec {
     requests-toolbelt
   ];
 
+  preCheck = ''
+    export CI=true
+  '';
+
   pytestFlagsArray = [
     "-W"
     "ignore::DeprecationWarning"