diff --git a/.gitignore b/.gitignore
index bf38b87bb222f97c9fd49496fce14d20209f2227..4b3d3c7c7ae591b2c42e3e28a5e8cacfae256a6b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,4 @@ objs
 library_vol_0.25_ratio_0.0
 obj
 AM216_Final_Project
+!CAD/test.stl