diff --git a/.gitignore b/.gitignore
index 55d40be..f66eef0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,3 +48,6 @@ pkg
 
 # For rubinius:
 #*.rbc
+
+# extensions built for testing
+test_ext/*
diff --git a/ext/kyotocabinet-java/.gitignore b/ext/kyotocabinet-java/.gitignore
index 157bf52..76200f8 100644
--- a/ext/kyotocabinet-java/.gitignore
+++ b/ext/kyotocabinet-java/.gitignore
@@ -1 +1,4 @@
 autom4te.cache/*
+Makefile
+config.status
+config.tmp