diff --git a/Zend/tests/inheritance/gh16508.phpt b/Zend/tests/inheritance/gh16508.phpt
index 2330cf083ce..26e17354d65 100644
--- a/Zend/tests/inheritance/gh16508.phpt
+++ b/Zend/tests/inheritance/gh16508.phpt
@@ -3,6 +3,7 @@ GH-16508: Missing lineno in inheritance errors of delayed early bound classes
 --EXTENSIONS--
 opcache
 --INI--
+opcache.enable=1
 opcache.enable_cli=1
 --FILE--
 <?php
diff --git a/ext/zend_test/tests/optimizer_register_pass.phpt b/ext/zend_test/tests/optimizer_register_pass.phpt
index 50499344c47..907ec7f7f2d 100644
--- a/ext/zend_test/tests/optimizer_register_pass.phpt
+++ b/ext/zend_test/tests/optimizer_register_pass.phpt
@@ -13,6 +13,7 @@ if (getenv("SKIP_PRELOAD")) {
 }
 ?>
 --INI--
+opcache.enable=1
 opcache.enable_cli=1
 opcache.file_cache=
 opcache.file_cache_only=0