diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33119009..06674c5a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,4 +49,4 @@ jobs:
         run: pnpm run build
 
       - name: Test
-        run: pnpm run test --node-version=${{ matrix.node }}
+        run: TEST262_NODE_VERSION=${{ matrix.node }} pnpm run test
diff --git a/.npmrc b/.npmrc
index 32124bcc..43a0eb0f 100644
--- a/.npmrc
+++ b/.npmrc
@@ -2,4 +2,4 @@ prefer-workspace-packages = true
 engine-strict = true
 
 # NOTE: keep synced with ci.yml
-use-node-version = ${NODE_VERSION:-18.19.0}
+use-node-version = ${PNPM_NODE_VERSION:-18.19.0}
diff --git a/package.json b/package.json
index a7fb2275..d80d4034 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "ci": "pnpm run clean && pnpm run lint && pnpm run build && pnpm run test",
     "lint": "pnpm -r run lint",
     "build": "pnpm -r run build",
-    "test": "pnpm -r --filter=!@js-temporal/temporal-test262-runner run test",
+    "test": "pnpm -r --stream --filter=!@js-temporal/temporal-test262-runner run test",
     "clean": "pnpm -r run clean"
   },
   "devDependencies": {
diff --git a/packages/temporal-polyfill/scripts/test262.js b/packages/temporal-polyfill/scripts/test262.js
index 4363bac9..459127c5 100755
--- a/packages/temporal-polyfill/scripts/test262.js
+++ b/packages/temporal-polyfill/scripts/test262.js
@@ -49,29 +49,26 @@ yargs(hideBin(process.argv))
           default: false,
           type: 'boolean',
           description: 'Whether to test the minified bundle',
-        })
-        .option('node-version', {
-          requiresArg: true,
-          type: 'string',
-          description: 'Force a specific version of Node',
         }),
     async (options) => {
       const currentNodeVersion = process.versions.node
       const currentNodeMajorVersion = parseInt(currentNodeVersion.split('.')[0])
+      const requestedNodeVersion = process.env.TEST262_NODE_VERSION
 
       // If different version of Node requested, spawn a new process
-      if (
-        options.nodeVersion &&
-        options.nodeVersion !== currentNodeVersion &&
-        !process.env.NODE_VERSION // not already executing a forced-version call
-      ) {
+      if (requestedNodeVersion && requestedNodeVersion !== currentNodeVersion) {
         return await execLive(
           ['pnpm', 'exec', 'node', ...process.argv.slice(1)],
           {
             cwd: process.cwd(),
             env: {
               ...filterEnv(process.env),
-              NODE_VERSION: options.nodeVersion, // forces PNPM to use specific version (see .npmrc)
+
+              // Forces PNPM to use specific version (see .npmrc)
+              PNPM_NODE_VERSION: requestedNodeVersion,
+
+              // Clear requestedNodeVersion for spawned process
+              TEST262_NODE_VERSION: '',
             },
           },
         )