diff --git a/test/Makefile.am b/test/Makefile.am
index f45424a..2b3b8a9 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -27,6 +27,10 @@
 SUBDIRS += perl
 endif
 
+if WITH_PHP
+SUBDIRS += php
+endif
+
 if WITH_PYTHON
 SUBDIRS += py
 SUBDIRS += py.twisted