diff --git a/lib/core/request.js b/lib/core/request.js
index b0bd870e33a..0f89f318568 100644
--- a/lib/core/request.js
+++ b/lib/core/request.js
@@ -80,7 +80,7 @@ class Request {
 
     if (typeof method !== 'string') {
       throw new InvalidArgumentError('method must be a string')
-    } else if (tokenRegExp.exec(method) === null) {
+    } else if (!util.isValidHTTPToken(method)) {
       throw new InvalidArgumentError('invalid request method')
     }
 
diff --git a/lib/core/util.js b/lib/core/util.js
index 5a28529b663..338c6f63d17 100644
--- a/lib/core/util.js
+++ b/lib/core/util.js
@@ -449,6 +449,52 @@ function toUSVString (val) {
   return `${val}`
 }
 
+/**
+ * @see https://tools.ietf.org/html/rfc7230#section-3.2.6
+ * @param {number} c
+ */
+function isTokenCharCode (c) {
+  switch (c) {
+    case 0x22:
+    case 0x28:
+    case 0x29:
+    case 0x2c:
+    case 0x2f:
+    case 0x3a:
+    case 0x3b:
+    case 0x3c:
+    case 0x3d:
+    case 0x3e:
+    case 0x3f:
+    case 0x40:
+    case 0x5b:
+    case 0x5c:
+    case 0x5d:
+    case 0x7b:
+    case 0x7d:
+      // DQUOTE and "(),/:;<=>?@[\]{}"
+      return false
+    default:
+      // VCHAR %x21-7E
+      return c >= 0x21 && c <= 0x7e
+  }
+}
+
+/**
+ * @param {string} characters
+ */
+function isValidHTTPToken (characters) {
+  if (characters.length === 0) {
+    return false
+  }
+  for (let i = 0; i < characters.length; ++i) {
+    if (!isTokenCharCode(characters.charCodeAt(i))) {
+      return false
+    }
+  }
+  return true
+}
+
 // Parsed accordingly to RFC 9110
 // https://www.rfc-editor.org/rfc/rfc9110#field.content-range
 function parseRangeHeader (range) {
@@ -497,6 +543,8 @@ module.exports = {
   buildURL,
   throwIfAborted,
   addAbortListener,
+  isValidHTTPToken,
+  isTokenCharCode,
   parseRangeHeader,
   nodeMajor,
   nodeMinor,
diff --git a/lib/fetch/util.js b/lib/fetch/util.js
index 96711267681..50c96a3c8cd 100644
--- a/lib/fetch/util.js
+++ b/lib/fetch/util.js
@@ -3,7 +3,7 @@
 const { redirectStatusSet, referrerPolicySet: referrerPolicyTokens, badPortsSet } = require('./constants')
 const { getGlobalOrigin } = require('./global')
 const { performance } = require('perf_hooks')
-const { isBlobLike, toUSVString, ReadableStreamFrom } = require('../core/util')
+const { isBlobLike, toUSVString, ReadableStreamFrom, isValidHTTPToken } = require('../core/util')
 const assert = require('assert')
 const { isUint8Array } = require('util/types')
 
@@ -103,52 +103,6 @@ function isValidReasonPhrase (statusText) {
   return true
 }
 
-/**
- * @see https://tools.ietf.org/html/rfc7230#section-3.2.6
- * @param {number} c
- */
-function isTokenCharCode (c) {
-  switch (c) {
-    case 0x22:
-    case 0x28:
-    case 0x29:
-    case 0x2c:
-    case 0x2f:
-    case 0x3a:
-    case 0x3b:
-    case 0x3c:
-    case 0x3d:
-    case 0x3e:
-    case 0x3f:
-    case 0x40:
-    case 0x5b:
-    case 0x5c:
-    case 0x5d:
-    case 0x7b:
-    case 0x7d:
-      // DQUOTE and "(),/:;<=>?@[\]{}"
-      return false
-    default:
-      // VCHAR %x21-7E
-      return c >= 0x21 && c <= 0x7e
-  }
-}
-
-/**
- * @param {string} characters
- */
-function isValidHTTPToken (characters) {
-  if (characters.length === 0) {
-    return false
-  }
-  for (let i = 0; i < characters.length; ++i) {
-    if (!isTokenCharCode(characters.charCodeAt(i))) {
-      return false
-    }
-  }
-  return true
-}
-
 /**
  * @see https://fetch.spec.whatwg.org/#header-name
  * @param {string} potentialValue