diff --git a/tests/Makefile.am b/tests/Makefile.am
index e5b9591cd..0d2758c36 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -2,4 +2,4 @@
 
 include $(top_srcdir)/Makefile.am.common
 
-SUBDIRS = db kdc gss
+SUBDIRS = db kdc gss plugin