diff --git a/lib/internal/crypto/keygen.js b/lib/internal/crypto/keygen.js
index 61898989b08abe..7222d301f08692 100644
--- a/lib/internal/crypto/keygen.js
+++ b/lib/internal/crypto/keygen.js
@@ -15,7 +15,7 @@ const {
   PK_FORMAT_PEM
 } = internalBinding('crypto');
 const { customPromisifyArgs } = require('internal/util');
-const { isUint32 } = require('internal/validators');
+const { isUint32, validateString } = require('internal/validators');
 const {
   ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS,
   ERR_INVALID_ARG_TYPE,
@@ -157,8 +157,7 @@ function parseKeyEncoding(keyType, options) {
 }
 
 function check(type, options, callback) {
-  if (typeof type !== 'string')
-    throw new ERR_INVALID_ARG_TYPE('type', 'string', type);
+  validateString(type, 'type');
   if (options == null || typeof options !== 'object')
     throw new ERR_INVALID_ARG_TYPE('options', 'object', options);
 
diff --git a/lib/internal/dns/promises.js b/lib/internal/dns/promises.js
index 4bf5ac02198333..be49ebf2106d7e 100644
--- a/lib/internal/dns/promises.js
+++ b/lib/internal/dns/promises.js
@@ -21,6 +21,7 @@ const {
   ERR_MISSING_ARGS,
   ERR_SOCKET_BAD_PORT
 } = codes;
+const { validateString } = require('internal/validators');
 
 
 function onlookup(err, addresses) {
@@ -192,9 +193,7 @@ function createResolverPromise(resolver, bindingName, hostname, ttl) {
 
 function resolver(bindingName) {
   function query(name, options) {
-    if (typeof name !== 'string') {
-      throw new ERR_INVALID_ARG_TYPE('name', 'string', name);
-    }
+    validateString(name, 'name');
 
     const ttl = !!(options && options.ttl);
     return createResolverPromise(this, bindingName, name, ttl);
diff --git a/lib/internal/http2/core.js b/lib/internal/http2/core.js
index 6ce426a207a488..b15e15f64fa2f7 100644
--- a/lib/internal/http2/core.js
+++ b/lib/internal/http2/core.js
@@ -78,7 +78,7 @@ const {
     ERR_SOCKET_CLOSED
   }
 } = require('internal/errors');
-const { validateNumber } = require('internal/validators');
+const { validateNumber, validateString } = require('internal/validators');
 const { utcDate } = require('internal/http');
 const { onServerStream,
         Http2ServerRequest,
@@ -1372,8 +1372,7 @@ class ServerHttp2Session extends Http2Session {
       }
     }
 
-    if (typeof alt !== 'string')
-      throw new ERR_INVALID_ARG_TYPE('alt', 'string', alt);
+    validateString(alt, 'alt');
     if (!kQuotedString.test(alt))
       throw new ERR_INVALID_CHAR('alt');
 
@@ -1402,8 +1401,7 @@ class ServerHttp2Session extends Http2Session {
       } else if (origin != null && typeof origin === 'object') {
         origin = origin.origin;
       }
-      if (typeof origin !== 'string')
-        throw new ERR_INVALID_ARG_TYPE('origin', 'string', origin);
+      validateString(origin, 'origin');
       if (origin === 'null')
         throw new ERR_HTTP2_INVALID_ORIGIN();
 
diff --git a/lib/internal/process/main_thread_only.js b/lib/internal/process/main_thread_only.js
index 148dfdc0f7f980..b8b7a454dc2f9f 100644
--- a/lib/internal/process/main_thread_only.js
+++ b/lib/internal/process/main_thread_only.js
@@ -12,7 +12,8 @@ const {
 } = require('internal/errors');
 const {
   validateMode,
-  validateUint32
+  validateUint32,
+  validateString
 } = require('internal/validators');
 
 const {
@@ -36,9 +37,7 @@ function setupProcessMethods(_chdir, _umask, _initgroups, _setegid,
   }
 
   process.chdir = function chdir(directory) {
-    if (typeof directory !== 'string') {
-      throw new ERR_INVALID_ARG_TYPE('directory', 'string', directory);
-    }
+    validateString(directory, 'directory');
     return _chdir(directory);
   };
 
diff --git a/lib/internal/vm/source_text_module.js b/lib/internal/vm/source_text_module.js
index d22db6e914f50d..8b107a9b74866f 100644
--- a/lib/internal/vm/source_text_module.js
+++ b/lib/internal/vm/source_text_module.js
@@ -18,7 +18,11 @@ const {
   emitExperimentalWarning
 } = require('internal/util');
 const { SafePromise } = require('internal/safe_globals');
-const { validateInt32, validateUint32 } = require('internal/validators');
+const {
+  validateInt32,
+  validateUint32,
+  validateString
+} = require('internal/validators');
 
 const {
   ModuleWrap,
@@ -54,8 +58,7 @@ class SourceTextModule {
   constructor(src, options = {}) {
     emitExperimentalWarning('vm.SourceTextModule');
 
-    if (typeof src !== 'string')
-      throw new ERR_INVALID_ARG_TYPE('src', 'string', src);
+    validateString(src, 'src');
     if (typeof options !== 'object' || options === null)
       throw new ERR_INVALID_ARG_TYPE('options', 'Object', options);
 
@@ -79,9 +82,7 @@ class SourceTextModule {
 
     let { url } = options;
     if (url !== undefined) {
-      if (typeof url !== 'string') {
-        throw new ERR_INVALID_ARG_TYPE('options.url', 'string', url);
-      }
+      validateString(url, 'options.url');
       url = new URL(url).href;
     } else if (context === undefined) {
       url = `${defaultModuleName}(${globalModuleId++})`;
diff --git a/lib/internal/worker.js b/lib/internal/worker.js
index 669a86bb23faef..9e41dba7169236 100644
--- a/lib/internal/worker.js
+++ b/lib/internal/worker.js
@@ -6,11 +6,11 @@ const path = require('path');
 const util = require('util');
 const { Readable, Writable } = require('stream');
 const {
-  ERR_INVALID_ARG_TYPE,
   ERR_WORKER_PATH,
   ERR_WORKER_UNSERIALIZABLE_ERROR,
   ERR_WORKER_UNSUPPORTED_EXTENSION,
 } = require('internal/errors').codes;
+const { validateString } = require('internal/validators');
 
 const { MessagePort, MessageChannel } = internalBinding('messaging');
 const {
@@ -251,9 +251,7 @@ class Worker extends EventEmitter {
   constructor(filename, options = {}) {
     super();
     debug(`[${threadId}] create new worker`, filename, options);
-    if (typeof filename !== 'string') {
-      throw new ERR_INVALID_ARG_TYPE('filename', 'string', filename);
-    }
+    validateString(filename, 'filename');
 
     if (!options.eval) {
       if (!path.isAbsolute(filename) &&
diff --git a/lib/readline.js b/lib/readline.js
index e4d9e1aa45fbf5..10cd583f162407 100644
--- a/lib/readline.js
+++ b/lib/readline.js
@@ -28,11 +28,11 @@
 'use strict';
 
 const {
-  ERR_INVALID_ARG_TYPE,
   ERR_INVALID_CURSOR_POS,
   ERR_INVALID_OPT_VALUE
 } = require('internal/errors').codes;
 const { debug, inherits } = require('util');
+const { validateString } = require('internal/validators');
 const { emitExperimentalWarning } = require('internal/util');
 const { Buffer } = require('buffer');
 const EventEmitter = require('events');
@@ -310,9 +310,7 @@ Interface.prototype._onLine = function(line) {
 };
 
 Interface.prototype._writeToOutput = function _writeToOutput(stringToWrite) {
-  if (typeof stringToWrite !== 'string') {
-    throw new ERR_INVALID_ARG_TYPE('stringToWrite', 'string', stringToWrite);
-  }
+  validateString(stringToWrite, 'stringToWrite');
 
   if (this.output !== null && this.output !== undefined) {
     this.output.write(stringToWrite);
diff --git a/lib/url.js b/lib/url.js
index 29dec5cc5f91c2..c34eee638cdf0b 100644
--- a/lib/url.js
+++ b/lib/url.js
@@ -31,6 +31,7 @@ const { SafeSet } = require('internal/safe_globals');
 const {
   ERR_INVALID_ARG_TYPE
 } = require('internal/errors').codes;
+const { validateString } = require('internal/validators');
 
 // This ensures setURLConstructor() is called before the native
 // URL::ToObject() method is used.
@@ -150,9 +151,7 @@ function urlParse(url, parseQueryString, slashesDenoteHost) {
 }
 
 Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
-  if (typeof url !== 'string') {
-    throw new ERR_INVALID_ARG_TYPE('url', 'string', url);
-  }
+  validateString(url, 'url');
 
   // Copy chrome, IE, opera backslash-handling behavior.
   // Back slashes before the query string get converted to forward slashes
diff --git a/lib/v8.js b/lib/v8.js
index b29304de5c08dc..3d75cf75847876 100644
--- a/lib/v8.js
+++ b/lib/v8.js
@@ -15,7 +15,7 @@
 'use strict';
 
 const { Buffer } = require('buffer');
-const { ERR_INVALID_ARG_TYPE } = require('internal/errors').codes;
+const { validateString } = require('internal/validators');
 const {
   Serializer: _Serializer,
   Deserializer: _Deserializer
@@ -66,8 +66,7 @@ const heapSpaceStatisticsBuffer =
     new Float64Array(heapSpaceStatisticsArrayBuffer);
 
 function setFlagsFromString(flags) {
-  if (typeof flags !== 'string')
-    throw new ERR_INVALID_ARG_TYPE('flags', 'string', flags);
+  validateString(flags, 'flags');
   _setFlagsFromString(flags);
 }