Index: tests/phpunit/tests/functions/__return.php
===================================================================
--- tests/phpunit/tests/functions/__return.php	(nonexistent)
+++ tests/phpunit/tests/functions/__return.php	(working copy)
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Tests for __return_** set of functions
+ *
+ * Here for competence
+ *
+ * @group functions.php
+ * @ticket #46043
+ */
+class TEST__Return extends WP_UnitTestCase {
+
+	public function test__return_true(){
+		$this->assertTrue( __return_true() );
+	}
+
+	public function test__return_false(){
+		$this->assertFalse( __return_false() );
+	}
+
+	public function test__return_zero(){
+		$this->assertSame( 0, __return_zero() );
+	}
+
+	public function test__return_empty_array(){
+		$this->assertSame( array(), __return_empty_array() );
+	}
+
+	public function test__return_null(){
+		$this->assertNull( __return_null() );
+	}
+
+	public function test__return_empty_string(){
+		$this->assertSame( '', __return_empty_string() );
+	}
+}