diff --git a/Zend/tests/bug78973.phpt b/Zend/tests/bug78973.phpt
index e18c761ca61..e1286e0a851 100644
--- a/Zend/tests/bug78973.phpt
+++ b/Zend/tests/bug78973.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Bug #78973: Destructor during CV freeing causes segfault if opline never saved
+--INI--
+opcache.optimization_level=0
 --FILE--
 <?php