diff --git a/ChangeLog b/ChangeLog
index 12e1ef5fbe..a089758705 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Mon Jan 12 17:23:05 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit/assertions.rb (assert_nothing_raised): removes the
+	  current trace to get rid of an issue of MiniTest::Unit#location.
+
+Mon Jan 12 16:49:20 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* instruby.rb (install): erased a garbage.
+
 Mon Jan 12 16:45:28 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* win32/win32.c (open_dir_handle): extracted from rb_w32_opendir.
diff --git a/lib/test/unit/assertions.rb b/lib/test/unit/assertions.rb
index c15432f058..ac3ecf93c7 100644
--- a/lib/test/unit/assertions.rb
+++ b/lib/test/unit/assertions.rb
@@ -22,12 +22,18 @@ module Test
           msg = args.pop
         end
         begin
-          yield
+          line = __LINE__; yield
         rescue Exception => e
-          if ((args.empty? && !e.instance_of?(MiniTest::Assertion)) ||
+          bt = e.backtrace
+          as = e.instance_of?(MiniTest::Assertion)
+          if as
+            ans = /\A#{Regexp.quote(__FILE__)}:#{line}:in /o
+            bt.reject! {|line| ans =~ line}
+          end
+          if ((args.empty? && !as) ||
               args.any? {|a| a.instance_of?(Module) ? e.is_a?(a) : e.class == a })
             msg = message(msg) { "Exception raised:\n<#{mu_pp(e)}>" }
-            raise MiniTest::Assertion, msg.call, e.backtrace
+            raise MiniTest::Assertion, msg.call, bt
           else
             raise
           end