diff --git a/tests/unit-tests/formatting/functions.php b/tests/unit-tests/formatting/functions.php
index 262988158ee..b1c0ea1a48d 100644
--- a/tests/unit-tests/formatting/functions.php
+++ b/tests/unit-tests/formatting/functions.php
@@ -276,7 +276,18 @@ class Functions extends \WC_Unit_Test_Case {
 	 */
 	public function test_wc_clean() {
 
-		$this->assertInternalType( 'string', wc_clean( 'cleaned' ) );
+		$this->assertEquals( 'cleaned', wc_clean( '<script>alert();</script>cleaned' ) );
+	}
+
+	/**
+	 * Test wc_sanitize_tooltip() - note this is a basic type test as WP core already
+	 * has coverage for wp_kses()
+	 *
+	 * @since 2.4
+	 */
+	public function test_wc_sanitize_tooltip() {
+
+		$this->assertEquals( 'alert();cleaned', wc_sanitize_tooltip( '<script>alert();</script>cleaned' ) );
 	}
 
 	/**