diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index d990bc07ad2..9bd25cfff1d 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -50,9 +50,16 @@ python3Packages.buildPythonApplication rec {
     liblarch
   ];
 
+  checkInputs = with python3Packages; [
+    nose
+    mock
+  ];
+
   format = "other";
   strictDeps = false; # gobject-introspection does not run with strictDeps (https://github.com/NixOS/nixpkgs/issues/56943)
 
+  checkPhase = "python3 ../run-tests";
+
   meta = with stdenv.lib; {
     description = " A personal tasks and TODO-list items organizer.";
     longDescription = ''