diff --git a/tests/unit-tests/core/functions.php b/tests/unit-tests/core/functions.php
index 280c13d6c7d..dbfde11fe4f 100644
--- a/tests/unit-tests/core/functions.php
+++ b/tests/unit-tests/core/functions.php
@@ -52,4 +52,15 @@ class WC_Tests_WooCommerce_Functions extends WC_Unit_Test_Case {
 		) );
 		$this->assertEquals( $new_currency, $order->get_currency() );
 	}
+
+	/**
+	 * Test the wc_is_active_theme function.
+	 *
+	 * @return void
+	 */
+	public function test_wc_is_active_theme() {
+		$this->assertTrue( wc_is_active_theme( 'default' ) );
+		$this->assertFalse( wc_is_active_theme( 'twentyfifteen' ) );
+		$this->assertTrue( wc_is_active_theme( array( 'default', 'twentyseventeen' ) ) );
+	}
 }