diff --git a/tests/dbObjectTests.php b/tests/dbObjectTests.php
index bc29ee6d..e9cd9c42 100644
--- a/tests/dbObjectTests.php
+++ b/tests/dbObjectTests.php
@@ -41,7 +41,7 @@
         Array ('login' => 'user2',
                'customerId' => 10,
                'firstName' => 'Mike',
-               'lastName' => NULL,
+               'lastName' => null,
                'password' => $db->func('SHA1(?)',Array ("secretpassword2+salt")),
                'expires' => $db->now('+1Y'),
                'loginCount' => $db->inc(2)
diff --git a/tests/mysqliDbTests.php b/tests/mysqliDbTests.php
index bd35bc30..05dae8ce 100644
--- a/tests/mysqliDbTests.php
+++ b/tests/mysqliDbTests.php
@@ -61,7 +61,7 @@ function pretty_print($array) {
         Array ('login' => 'user2',
                'customerId' => 10,
                'firstName' => 'Mike',
-               'lastName' => NULL,
+               'lastName' => null,
                'password' => $db->func('SHA1(?)',Array ("secretpassword2+salt")),
                'createdAt' => $db->now(),
                'updatedAt' => $db->now(),
@@ -312,7 +312,7 @@ function createTable ($name, $data) {
     exit;
 }
 ///
-$db->where ("lastName", NULL, '<=>');
+$db->where ("lastName", null, '<=>');
 $r = $db->get("users");
 if ($db->count != 1) {
     echo "Invalid users count on null where()";