diff --git a/sim/.Sanitize b/sim/.Sanitize
index d051804dd0..315c5bf2b1 100644
--- a/sim/.Sanitize
+++ b/sim/.Sanitize
@@ -65,6 +65,8 @@ z8k
 
 Things-to-lose:
 
+testsuite
+
 Do-last:
 
 m32r_files="configure configure.in ChangeLog"