5.2 tests appear to not have enough memory
diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index 713c0fd..5e41987 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+ini_set('memory_limit', '128M');
 
 // Errors on full!
 ini_set('display_errors', 1);