diff --git a/ChangeLog b/ChangeLog
index 09fc856808..04f0f64e18 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jul 10 15:57:53 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* bootstraptest/test_flip.rb: new test for flip-flop operator.
+
 Tue Jul 10 14:50:01 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* bcc32/{Makefile.sub,setup.mak}: remove surplus slash from srcdir.
diff --git a/bootstraptest/test_flip.rb b/bootstraptest/test_flip.rb
new file mode 100644
index 0000000000..ff194868b2
--- /dev/null
+++ b/bootstraptest/test_flip.rb
@@ -0,0 +1 @@
+assert_equal %q{E}, %q{$_ = "E"; eval("nil if true..~/^E/",nil,"-e"); $_}