diff --git a/lib/rb/Makefile.am b/lib/rb/Makefile.am
index 5ba608c..3534e27 100644
--- a/lib/rb/Makefile.am
+++ b/lib/rb/Makefile.am
@@ -40,3 +40,7 @@
 	$$RUBY setup.rb clean
 
 check-local: all
+if HAVE_RSPEC
+	rake spec
+endif
+