diff --git a/Cargo.toml b/Cargo.toml
index 13b2f82ba..ba43dfac7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,6 +33,7 @@ windows = ["feat_os_windows"]
 ## project-specific feature shortcodes
 nightly = []
 test_unimplemented = []
+expensive_tests = []
 # * only build `uudoc` when `--feature uudoc` is activated
 uudoc = ["zip", "dep:uuhelp_parser"]
 ## features