diff --git a/ChangeLog b/ChangeLog
index a6bd0c1077..eca4ca5266 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Aug 22 13:02:26 2007  Tanaka Akira  <akr@fsij.org>
+
+	* bootstraptest/runner.rb (in_temporary_working_directory):
+	  don't remove the directory specified by --dir.
+
 Wed Aug 22 05:51:23 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* util.c (ruby_strtod): replaced by the implementation by David
diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 117f030365..8a2597bcb2 100644
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -205,7 +205,6 @@ end
 
 def in_temporary_working_directory(dir)
   if dir
-    FileUtils.rm_rf dir
     Dir.mkdir dir
     Dir.chdir(dir) {
       yield