diff --git a/src_v2/parser/parser_internals.nim b/src_v2/parser/parser_internals.nim
index efd91d5..7379968 100644
--- a/src_v2/parser/parser_internals.nim
+++ b/src_v2/parser/parser_internals.nim
@@ -253,9 +253,12 @@ when isMainModule:
     assert testParser123.flatMap(str("123")).isStreamCompleted() == true
 
   block testParsingApi:
-    # Optional
+    # optional
     assert testParser123.flatMap(optional(ch('1'))).tokensToString() == "1"
     assert testParser123.flatMap(optional(ch('2'))).tokensToString() == ""
 
-    # Ignore
+    # ignore
     assert testParser123.flatMap(ignore(ch('1'))).tokensToString() == ""
+
+    # manyUntil
+    assert initParserResult("abc1").flatMap(manyUntil(anyCh, digit)).tokensToString() == "abc"