diff --git a/ast/src/leo.pest b/ast/src/leo.pest
index 6a6713bc33..d77d271753 100644
--- a/ast/src/leo.pest
+++ b/ast/src/leo.pest
@@ -11,17 +11,23 @@ identifier = @{ ((!protected_name ~ ASCII_ALPHA) | (protected_name ~ (ASCII_ALPH
 protected_name = {
     "address"
     | "as"
+    | "circuit"
     | "const"
     | "else"
     | "false"
-    | "function"
+    | "field"
     | "for"
+    | "function"
+    | "group"
     | "if"
+    | "import"
     | "in"
     | "let"
     | "mut"
     | "return"
     | "static"
+    | "string"
+    | "test"
     | "true"
 }