diff --git a/lib/fs.js b/lib/fs.js
index e05b8335f89c47..a0f501f012034d 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -103,6 +103,8 @@ const {
   },
   copyObject,
   Dirent,
+  join,
+  relative,
   getDirent,
   getDirents,
   getOptions,
@@ -1401,7 +1403,7 @@ function handleDirents({ result, currentPath, context }) {
   for (let i = 0; i < length; i++) {
     // Avoid excluding symlinks, as they are not directories.
     // Refs: https://github.com/nodejs/node/issues/52663
-    const fullPath = pathModule.join(currentPath, names[i]);
+    const fullPath = join(currentPath, names[i]);
     const dirent = getDirent(currentPath, names[i], types[i]);
     ArrayPrototypePush(context.readdirResults, dirent);
 
@@ -1413,8 +1415,8 @@ function handleDirents({ result, currentPath, context }) {
 
 function handleFilePaths({ result, currentPath, context }) {
   for (let i = 0; i < result.length; i++) {
-    const resultPath = pathModule.join(currentPath, result[i]);
-    const relativeResultPath = pathModule.relative(context.basePath, resultPath);
+    const resultPath = join(currentPath, result[i]);
+    const relativeResultPath = relative(context.basePath, resultPath);
     const stat = binding.internalModuleStat(resultPath);
     ArrayPrototypePush(context.readdirResults, relativeResultPath);
 
diff --git a/lib/internal/fs/utils.js b/lib/internal/fs/utils.js
index 0f788ce4dbc3a3..5f421faffe818b 100644
--- a/lib/internal/fs/utils.js
+++ b/lib/internal/fs/utils.js
@@ -229,6 +229,11 @@ function join(path, name) {
     return Buffer.concat([pathBuffer, name]);
   }
 
+  if (isUint8Array(path) && typeof name === 'string') {
+    const nameBuffer = Buffer.from(name);
+    return Buffer.concat([path, bufferSep, nameBuffer]);
+  }
+
   if (typeof path === 'string' && typeof name === 'string') {
     return pathModule.join(path, name);
   }
@@ -241,6 +246,28 @@ function join(path, name) {
     'path', ['string', 'Buffer'], path);
 }
 
+function relative(from, to) {
+  if (typeof from === 'string' && isUint8Array(to)) {
+    return pathModule.relative(from, Buffer.from(to));
+  }
+
+  if (isUint8Array(from) && typeof to === 'string') {
+    return Buffer.from(pathModule.relative(Buffer.from(from), to));
+  }
+
+  if (isUint8Array(from) && isUint8Array(to)) {
+    const fromPath = Buffer.from(from);
+    const toPath = Buffer.from(to);
+    return pathModule.relative(fromPath.toString(), toPath.toString());
+  }
+
+  if (typeof from === 'string' && typeof to === 'string') {
+    return pathModule.relative(from, to);
+  }
+
+  throw new ERR_INVALID_ARG_TYPE('from', ['string', 'Buffer'], from);
+}
+
 function getDirents(path, { 0: names, 1: types }, callback) {
   let i;
   if (typeof callback === 'function') {
@@ -719,6 +746,9 @@ const validatePath = hideStackFrames((path, propName = 'path') => {
   );
 });
 
+/**
+ * @returns {string|Buffer}
+ */
 const getValidatedPath = hideStackFrames((fileURLOrPath, propName = 'path') => {
   const path = toPathIfFileURL(fileURLOrPath);
   validatePath(path, propName);
@@ -925,6 +955,8 @@ module.exports = {
     kReadFileUnknownBufferLength,
     kWriteFileMaxChunkSize,
   },
+  join,
+  relative,
   assertEncoding,
   BigIntStats,  // for testing
   copyObject,
diff --git a/src/node_file.cc b/src/node_file.cc
index 2a2384c88c63d7..26edb09cd245cd 100644
--- a/src/node_file.cc
+++ b/src/node_file.cc
@@ -1053,7 +1053,7 @@ static void InternalModuleStat(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
   CHECK_EQ(args.Length(), 1);
-  CHECK(args[0]->IsString());
+  CHECK(args[0]->IsString() || args[0]->IsArrayBufferView());
   BufferValue path(env->isolate(), args[0]);
   CHECK_NOT_NULL(*path);
   ToNamespacedPath(env, &path);
diff --git a/test/parallel/test-fs-readdir-buffer.js b/test/parallel/test-fs-readdir-buffer.js
index 54b7353cb1b3b2..04db54a1fd67b0 100644
--- a/test/parallel/test-fs-readdir-buffer.js
+++ b/test/parallel/test-fs-readdir-buffer.js
@@ -6,12 +6,8 @@ if (!common.isMacOS) {
   common.skip('this tests works only on MacOS');
 }
 
-const assert = require('assert');
-
 fs.readdir(
   Buffer.from('/dev'),
   { withFileTypes: true, encoding: 'buffer' },
-  common.mustCall((e, d) => {
-    assert.strictEqual(e, null);
-  })
+  common.mustSucceed()
 );
diff --git a/test/parallel/test-fs-readdir-recursive.js b/test/parallel/test-fs-readdir-recursive.js
index 7cfc0903faa0b4..acc943ca2ac5a5 100644
--- a/test/parallel/test-fs-readdir-recursive.js
+++ b/test/parallel/test-fs-readdir-recursive.js
@@ -12,6 +12,8 @@ test('readdir should not recurse into Unix domain sockets', (t, done) => {
     // The process should not crash
     // See https://github.com/nodejs/node/issues/52159
     fs.readdirSync(tmpdir.path, { recursive: true });
+    // Buffer with utf8 default encoding
+    fs.readdirSync(Buffer.from(tmpdir.path), { recursive: true });
     server.close();
     done();
   }));
diff --git a/test/parallel/test-fs-readdir.js b/test/parallel/test-fs-readdir.js
index 6ae29045cdd7a3..d56925edc1f184 100644
--- a/test/parallel/test-fs-readdir.js
+++ b/test/parallel/test-fs-readdir.js
@@ -20,11 +20,25 @@ files.forEach(function(currentFile) {
 // Check the readdir Sync version
 assert.deepStrictEqual(files, fs.readdirSync(readdirDir).sort());
 
+// Check the readdir Sync version (Buffer with utf8 default encoding)
+assert.deepStrictEqual(
+  files,
+  fs.readdirSync(Buffer.from(readdirDir)).sort()
+);
+
 // Check the readdir async version
 fs.readdir(readdirDir, common.mustSucceed((f) => {
   assert.deepStrictEqual(files, f.sort());
 }));
 
+// Check the readdir async version (Buffer with utf8 default encoding)
+fs.readdir(
+  Buffer.from(readdirDir),
+  common.mustSucceed((f) => {
+    assert.deepStrictEqual(files, f.sort());
+  })
+);
+
 // readdir() on file should throw ENOTDIR
 // https://github.com/joyent/node/issues/1869
 assert.throws(function() {