diff --git a/ext/oci8/php_oci8_int.h b/ext/oci8/php_oci8_int.h
index 08bec33193a..171edfa53d2 100644
--- a/ext/oci8/php_oci8_int.h
+++ b/ext/oci8/php_oci8_int.h
@@ -103,7 +103,7 @@ extern zend_class_entry *oci_coll_class_entry_ptr;
  * PHP_OCI_CRED_EXT must be distinct from the OCI_xxx privilege
  * values.
  */
-#define PHP_OCI_CRED_EXT                    (1<<31)
+#define PHP_OCI_CRED_EXT                    (1u<<31)
 #if ((PHP_OCI_CRED_EXT == OCI_DEFAULT) || (PHP_OCI_CRED_EXT & (OCI_SYSOPER | OCI_SYSDBA)))
 #error Invalid value for PHP_OCI_CRED_EXT
 #endif
diff --git a/ext/oci8/tests/privileged_connect1.phpt b/ext/oci8/tests/privileged_connect1.phpt
index 8043182cec7..09c5f047d16 100644
--- a/ext/oci8/tests/privileged_connect1.phpt
+++ b/ext/oci8/tests/privileged_connect1.phpt
@@ -2,6 +2,10 @@
 privileged connect tests
 --EXTENSIONS--
 oci8
+--SKIPIF--
+<?php 
+if (getenv('SKIP_ASAN')) die('skip leaks memory under asan');
+?>
 --INI--
 oci8.privileged_connect=1
 --FILE--
diff --git a/ext/pdo_oci/tests/pecl_bug_6364.phpt b/ext/pdo_oci/tests/pecl_bug_6364.phpt
index 5decdcb8000..9a97496fd0f 100644
--- a/ext/pdo_oci/tests/pecl_bug_6364.phpt
+++ b/ext/pdo_oci/tests/pecl_bug_6364.phpt
@@ -5,6 +5,7 @@ pdo
 pdo_oci
 --SKIPIF--
 <?php
+if (getenv('SKIP_ASAN')) die('skip leaks memory under asan');
 require(__DIR__.'/../../pdo/tests/pdo_test.inc');
 PDOTest::skip();
 ?>