diff --git a/.gitignore b/.gitignore
index d0a859c12d..cc5606e854 100644
--- a/.gitignore
+++ b/.gitignore
@@ -60,6 +60,7 @@ shell_g
 /test/promises-aplus/promises-tests
 /test/promises-aplus/promises-tests.tar.gz
 /test/promises-aplus/sinon
+/test/simdjs/CHECKED_OUT_*
 /test/simdjs/ecmascript_simd*
 /test/simdjs/data*
 /test/test262/data