diff --git a/css/css-viewport/zoom/parsing/zoom-valid.html b/css/css-viewport/zoom/parsing/zoom-valid.html
index 3f36508b8be55d..5e4500a59ff8d3 100644
--- a/css/css-viewport/zoom/parsing/zoom-valid.html
+++ b/css/css-viewport/zoom/parsing/zoom-valid.html
@@ -20,6 +20,8 @@
 test_valid_value("zoom", "0.5");
 
 test_invalid_value("zoom", "auto");
+test_invalid_value("zoom", "reset");
+test_invalid_value("zoom", "document");
 test_invalid_value("zoom", "-100%");
 test_invalid_value("zoom", "-200%");
 test_invalid_value("zoom", "-1");