diff --git a/phpcs.xml b/phpcs.xml
index 0e3a1ee6c..864fa0e89 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -43,4 +43,8 @@
 		<exclude-pattern>lib/*</exclude-pattern>
 		<exclude-pattern>tests/*</exclude-pattern>
 	</rule>
+
+	<rule ref="Squiz.Commenting.FunctionComment.Missing">
+		<exclude-pattern>tests/*</exclude-pattern>
+	</rule>
 </ruleset>
diff --git a/tests/phpunit/lock/ActionScheduler_OptionLock_Test.php b/tests/phpunit/lock/ActionScheduler_OptionLock_Test.php
index ba8c5f344..63afa3101 100644
--- a/tests/phpunit/lock/ActionScheduler_OptionLock_Test.php
+++ b/tests/phpunit/lock/ActionScheduler_OptionLock_Test.php
@@ -13,7 +13,7 @@ public function test_instance() {
 
 	public function test_is_locked() {
 		$lock      = ActionScheduler::lock();
-		$lock_type = md5( rand() );
+		$lock_type = md5( wp_rand() );
 
 		$this->assertFalse( $lock->is_locked( $lock_type ) );
 
@@ -23,7 +23,7 @@ public function test_is_locked() {
 
 	public function test_set() {
 		$lock      = ActionScheduler::lock();
-		$lock_type = md5( rand() );
+		$lock_type = md5( wp_rand() );
 
 		$lock->set( $lock_type );
 		$this->assertTrue( $lock->is_locked( $lock_type ) );
@@ -31,7 +31,7 @@ public function test_set() {
 
 	public function test_get_expiration() {
 		$lock      = ActionScheduler::lock();
-		$lock_type = md5( rand() );
+		$lock_type = md5( wp_rand() );
 
 		$lock->set( $lock_type );