diff --git a/test_problems/min_python/minDiamond/.cvsignore b/test_problems/min_python/minDiamond/.cvsignore
index eff194b53..498d82dc9 100644
--- a/test_problems/min_python/minDiamond/.cvsignore
+++ b/test_problems/min_python/minDiamond/.cvsignore
@@ -16,3 +16,4 @@ outputa.txt
 test.xml
 SunWS_cache
 testdest*
+.ctt*