diff --git a/lib/url-state-machine.js b/lib/url-state-machine.js
index ff3f095..52202bd 100644
--- a/lib/url-state-machine.js
+++ b/lib/url-state-machine.js
@@ -1039,10 +1039,7 @@ URLStateMachine.prototype["parse opaque path"] = function parseOpaquePath(c) {
     this.url.fragment = "";
     this.state = "fragment";
   } else {
-    // TODO: Add: not a URL code point
-    if (!isNaN(c) && c !== p("%")) {
-      this.validationErrors.push("invalid-URL-unit");
-    }
+    // TODO: If c is not the EOF code point, not a URL code point, and not U+0025 (%), invalid-URL-unit validation error.
 
     if (c === p("%") &&
         (!infra.isASCIIHex(this.input[this.pointer + 1]) ||