diff --git a/.gitignore b/.gitignore
index 283de97..db5b8db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,7 @@ artifacts/tests/visual/
 .env
 .env.*
 !.env.example
+
+# Git worktrees created inside the repository. A worktree is a checkout, not
+# source: committing one would nest a second working copy inside this one.
+.worktrees/