diff --git a/tests/phpunit/tests/pomo/pluralForms.php b/tests/phpunit/tests/pomo/pluralForms.php
index 0329374e94df8..8813336e37069 100644
--- a/tests/phpunit/tests/pomo/pluralForms.php
+++ b/tests/phpunit/tests/pomo/pluralForms.php
@@ -233,7 +233,7 @@ public function test_cache() {
 		$mock->expects( $this->once() )
 			->method( 'execute' )
 			->with( $this->identicalTo( 2 ) )
-			->will( $this->returnValue( 1 ) );
+			->willReturn( 1 );
 
 		$first  = $mock->get( 2 );
 		$second = $mock->get( 2 );
diff --git a/tests/phpunit/tests/rest-api/rest-server.php b/tests/phpunit/tests/rest-api/rest-server.php
index b8e8cc6f5adcb..dce5a045f73db 100644
--- a/tests/phpunit/tests/rest-api/rest-server.php
+++ b/tests/phpunit/tests/rest-api/rest-server.php
@@ -652,7 +652,7 @@ public function test_json_error_with_status() {
 
 		$stub->expects( $this->once() )
 			->method( 'set_status' )
-			->with( $this->equalTo( 400 ) );
+			->with( 400 );
 
 		$data     = array(
 			'code'    => 'wp-api-test-error',