diff --git a/ChangeLog b/ChangeLog
index 003ddc8096..804b7b6ae9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jun 16 13:49:28 2008  Tanaka Akira  <akr@fsij.org>
+
+	* common.mk (test-knownbug): new target for KNOWNBUGS.rb.
+
 Mon Jun 16 11:48:47 2008  Akinori MUSHA  <knu@iDaemons.org>
 
 	* KNOWNBUGS.rb: New file to address known bugs.
diff --git a/common.mk b/common.mk
index 50ec183ebd..a4c9b7039a 100644
--- a/common.mk
+++ b/common.mk
@@ -301,6 +301,9 @@ realclean-ext::
 
 check: test test-all
 
+test-knownbug: $(PROGRAM) PHONY
+	        $(RUNRUBY) $(srcdir)/KNOWNBUGS.rb
+
 test: miniruby$(EXEEXT) $(RBCONFIG) $(PROGRAM) PHONY
 	@$(MINIRUBY) $(srcdir)/rubytest.rb