2 files changed, 32 insertions, 0 deletions
diff --git a/ext/node/polyfills/worker_threads.ts b/ext/node/polyfills/worker_threads.ts
index f61e7e3e3..96aa02fe1 100644
--- a/ext/node/polyfills/worker_threads.ts
+++ b/ext/node/polyfills/worker_threads.ts
@@ -27,6 +27,7 @@ import * as webidl from "ext:deno_webidl/00_webidl.js";
 import { notImplemented } from "ext:deno_node/_utils.ts";
 import { EventEmitter } from "node:events";
 import { BroadcastChannel } from "ext:deno_broadcast_channel/01_broadcast_channel.js";
+import process from "node:process";
 
 const { ObjectPrototypeIsPrototypeOf } = primordials;
 const {
@@ -128,6 +129,7 @@ class NodeWorker extends EventEmitter {
     const serializedWorkerMetadata = serializeJsMessageData({
       workerData: options?.workerData,
       environmentData: environmentData,
+      env: options?.env,
     }, options?.transferList ?? []);
     const id = op_create_worker(
       {
@@ -348,6 +350,10 @@ internals.__initWorkerThreads = (
       const { 0: metadata, 1: _ } = maybeWorkerMetadata;
       workerData = metadata.workerData;
       environmentData = metadata.environmentData;
+      const env = metadata.env;
+      if (env) {
+        process.env = env;
+      }
     }
     defaultExport.workerData = workerData;
     defaultExport.parentPort = parentPort;
diff --git a/tests/unit_node/worker_threads_test.ts b/tests/unit_node/worker_threads_test.ts
index 21bbca194..a96896ce5 100644
--- a/tests/unit_node/worker_threads_test.ts
+++ b/tests/unit_node/worker_threads_test.ts
@@ -460,3 +460,29 @@ Deno.test("[node/worker_threads] receiveMessageOnPort works if there's pending r
   port5.close();
   port6.close();
 });
+
+Deno.test({
+  name: "[node/worker_threads] Worker env",
+  async fn() {
+    const deferred = Promise.withResolvers<void>();
+    const worker = new workerThreads.Worker(
+      `
+      import { parentPort } from "node:worker_threads";
+      import process from "node:process";
+      parentPort.postMessage(process.env.TEST_ENV);
+      `,
+      {
+        eval: true,
+        env: { TEST_ENV: "test" },
+      },
+    );
+
+    worker.on("message", (data) => {
+      assertEquals(data, "test");
+      deferred.resolve();
+    });
+
+    await deferred.promise;
+    await worker.terminate();
+  },
+});