diff --git a/ChangeLog b/ChangeLog
index abadb96020..25fe844004 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Jun  5 02:20:06 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* test/lib/envutil.rb (assert_no_memory_leak): change default value
+	  of limit from 1.5 to 2.0. It is ad-hoc fix to solve test failure
+	  in travis-ci.
+
 Fri Jun  5 01:17:21 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c (vm_defined): no need to use cast.
diff --git a/test/lib/envutil.rb b/test/lib/envutil.rb
index eb40272232..8fdc30772e 100644
--- a/test/lib/envutil.rb
+++ b/test/lib/envutil.rb
@@ -464,7 +464,7 @@ eom
         end
       end #case RUBY_PLATFORM
 
-      def assert_no_memory_leak(args, prepare, code, message=nil, limit: 1.5, rss: false, **opt)
+      def assert_no_memory_leak(args, prepare, code, message=nil, limit: 2.0, rss: false, **opt)
         require_relative 'memory_status'
         token = "\e[7;1m#{$$.to_s}:#{Time.now.strftime('%s.%L')}:#{rand(0x10000).to_s(16)}:\e[m"
         token_dump = token.dump