diff --git a/benchmark/fs/bench-unlinkSync.js b/benchmark/fs/bench-unlinkSync.js
new file mode 100644
index 00000000000000..8b992198c8d368
--- /dev/null
+++ b/benchmark/fs/bench-unlinkSync.js
@@ -0,0 +1,43 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+const tmpdir = require('../../test/common/tmpdir');
+tmpdir.refresh();
+
+const bench = common.createBenchmark(main, {
+  type: ['existing', 'non-existing'],
+  n: [1e3],
+});
+
+function main({ n, type }) {
+  let files;
+
+  switch (type) {
+    case 'existing':
+      files = [];
+
+      // Populate tmpdir with mock files
+      for (let i = 0; i < n; i++) {
+        const path = tmpdir.resolve(`unlinksync-bench-file-${i}`);
+        fs.writeFileSync(path, 'bench');
+        files.push(path);
+      }
+      break;
+    case 'non-existing':
+      files = new Array(n).fill(tmpdir.resolve(`.non-existing-file-${Date.now()}`));
+      break;
+    default:
+      new Error('Invalid type');
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    try {
+      fs.unlinkSync(files[i]);
+    } catch {
+      // do nothing
+    }
+  }
+  bench.end(n);
+}
diff --git a/common.gypi b/common.gypi
index 14f05fcf9ccb8d..909d09934a1b25 100644
--- a/common.gypi
+++ b/common.gypi
@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.18',
+    'v8_embedder_string': '-node.19',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/snapshot/embedded/platform-embedded-file-writer-base.cc b/deps/v8/src/snapshot/embedded/platform-embedded-file-writer-base.cc
index e0602edc7e1c6a..e4ca7bfdacb11c 100644
--- a/deps/v8/src/snapshot/embedded/platform-embedded-file-writer-base.cc
+++ b/deps/v8/src/snapshot/embedded/platform-embedded-file-writer-base.cc
@@ -130,7 +130,8 @@ EmbeddedTargetOs ToEmbeddedTargetOs(const char* s) {
   }
 
   std::string string(s);
-  if (string == "aix") {
+  // Python 3.9+ on IBM i returns os400 as sys.platform instead of aix
+  if (string == "aix" || string == "os400") {
     return EmbeddedTargetOs::kAIX;
   } else if (string == "chromeos") {
     return EmbeddedTargetOs::kChromeOS;
diff --git a/lib/fs.js b/lib/fs.js
index 9b6b61dc8efd42..29f356a57cd22e 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1850,10 +1850,7 @@ function unlink(path, callback) {
  * @returns {void}
  */
 function unlinkSync(path) {
-  path = getValidatedPath(path);
-  const ctx = { path };
-  binding.unlink(pathModule.toNamespacedPath(path), undefined, ctx);
-  handleErrorFromBinding(ctx);
+  return syncFs.unlink(path);
 }
 
 /**
diff --git a/lib/internal/fs/sync.js b/lib/internal/fs/sync.js
index 0d4ba90150e186..fbcc2ad2e25b2a 100644
--- a/lib/internal/fs/sync.js
+++ b/lib/internal/fs/sync.js
@@ -88,6 +88,11 @@ function close(fd) {
   return binding.closeSync(fd);
 }
 
+function unlink(path) {
+  path = pathModule.toNamespacedPath(getValidatedPath(path));
+  return binding.unlinkSync(path);
+}
+
 module.exports = {
   readFileUtf8,
   exists,
@@ -97,4 +102,5 @@ module.exports = {
   statfs,
   open,
   close,
+  unlink,
 };
diff --git a/src/node_file.cc b/src/node_file.cc
index b76eb385295836..aca7ec82101a60 100644
--- a/src/node_file.cc
+++ b/src/node_file.cc
@@ -1667,6 +1667,27 @@ static void Unlink(const FunctionCallbackInfo<Value>& args) {
   }
 }
 
+static void UnlinkSync(const FunctionCallbackInfo<Value>& args) {
+  Environment* env = Environment::GetCurrent(args);
+
+  const int argc = args.Length();
+  CHECK_GE(argc, 1);
+
+  BufferValue path(env->isolate(), args[0]);
+  CHECK_NOT_NULL(*path);
+  THROW_IF_INSUFFICIENT_PERMISSIONS(
+      env, permission::PermissionScope::kFileSystemWrite, path.ToStringView());
+
+  uv_fs_t req;
+  auto make = OnScopeLeave([&req]() { uv_fs_req_cleanup(&req); });
+  FS_SYNC_TRACE_BEGIN(unlink);
+  int err = uv_fs_unlink(nullptr, &req, *path, nullptr);
+  FS_SYNC_TRACE_END(unlink);
+  if (err < 0) {
+    return env->ThrowUVException(err, "unlink", nullptr, *path);
+  }
+}
+
 static void RMDir(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
@@ -3361,15 +3382,15 @@ static void CreatePerIsolateProperties(IsolateData* isolate_data,
   Isolate* isolate = isolate_data->isolate();
 
   SetMethod(isolate, target, "access", Access);
-  SetMethodNoSideEffect(isolate, target, "accessSync", AccessSync);
+  SetMethod(isolate, target, "accessSync", AccessSync);
   SetMethod(isolate, target, "close", Close);
   SetMethod(isolate, target, "closeSync", CloseSync);
-  SetMethodNoSideEffect(isolate, target, "existsSync", ExistsSync);
+  SetMethod(isolate, target, "existsSync", ExistsSync);
   SetMethod(isolate, target, "open", Open);
   SetMethod(isolate, target, "openSync", OpenSync);
   SetMethod(isolate, target, "openFileHandle", OpenFileHandle);
   SetMethod(isolate, target, "read", Read);
-  SetMethodNoSideEffect(isolate, target, "readFileUtf8", ReadFileUtf8);
+  SetMethod(isolate, target, "readFileUtf8", ReadFileUtf8);
   SetMethod(isolate, target, "readBuffers", ReadBuffers);
   SetMethod(isolate, target, "fdatasync", Fdatasync);
   SetMethod(isolate, target, "fsync", Fsync);
@@ -3390,12 +3411,13 @@ static void CreatePerIsolateProperties(IsolateData* isolate_data,
   SetMethod(isolate, target, "symlink", Symlink);
   SetMethod(isolate, target, "readlink", ReadLink);
   SetMethod(isolate, target, "unlink", Unlink);
+  SetMethod(isolate, target, "unlinkSync", UnlinkSync);
   SetMethod(isolate, target, "writeBuffer", WriteBuffer);
   SetMethod(isolate, target, "writeBuffers", WriteBuffers);
   SetMethod(isolate, target, "writeString", WriteString);
   SetMethod(isolate, target, "realpath", RealPath);
   SetMethod(isolate, target, "copyFile", CopyFile);
-  SetMethodNoSideEffect(isolate, target, "copyFileSync", CopyFileSync);
+  SetMethod(isolate, target, "copyFileSync", CopyFileSync);
 
   SetMethod(isolate, target, "chmod", Chmod);
   SetMethod(isolate, target, "fchmod", FChmod);
@@ -3515,6 +3537,7 @@ void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(Symlink);
   registry->Register(ReadLink);
   registry->Register(Unlink);
+  registry->Register(UnlinkSync);
   registry->Register(WriteBuffer);
   registry->Register(WriteBuffers);
   registry->Register(WriteString);
diff --git a/test/parallel/test-os.js b/test/parallel/test-os.js
index f0f55fbe261946..d82f2ece3159a6 100644
--- a/test/parallel/test-os.js
+++ b/test/parallel/test-os.js
@@ -81,6 +81,12 @@ const hostname = os.hostname();
 is.string(hostname);
 assert.ok(hostname.length > 0);
 
+const DUMMY_PRIORITY = 10;
+os.setPriority(DUMMY_PRIORITY);
+const priority = os.getPriority();
+is.number(priority);
+assert.strictEqual(priority, DUMMY_PRIORITY);
+
 // On IBMi, os.uptime() returns 'undefined'
 if (!common.isIBMi) {
   const uptime = os.uptime();