diff --git a/.travis.php.ini b/.travis.php.ini
index 01d4d71..74d95e4 100644
--- a/.travis.php.ini
+++ b/.travis.php.ini
@@ -1 +1 @@
-soap.wsdl_cache_dir = /tmp
\ No newline at end of file
+soap.wsdl_cache_dir = "/tmp"
\ No newline at end of file