diff --git a/.config/git/ignore b/.config/git/ignore
index 5b8567de..7e93430e 100644
--- a/.config/git/ignore
+++ b/.config/git/ignore
@@ -37,3 +37,6 @@ CLAUDE.local.md
# jj workspaces
/work
+
+# cargo mutants
+/mutants.out*
diff --git a/.config/git/ignore b/.config/git/ignore
index 5b8567de..7e93430e 100644
--- a/.config/git/ignore
+++ b/.config/git/ignore
@@ -37,3 +37,6 @@ CLAUDE.local.md
# jj workspaces
/work
+
+# cargo mutants
+/mutants.out*