diff --git a/tests/e2e/terminal-column-probes.ts b/tests/e2e/terminal-column-probes.ts
index 88f07a43f02..6e11151658c 100644
--- a/tests/e2e/terminal-column-probes.ts
+++ b/tests/e2e/terminal-column-probes.ts
@@ -7,6 +7,7 @@ import {
   waitForPtyPaneMounted,
   waitForPtyShellEcho
 } from './terminal-pty-readiness'
+import { nodeTerminalCommand } from './terminal-node-command'
 
 type TerminalColumnProbeWindow = Window & {
   __store?: {
@@ -87,7 +88,10 @@ export async function waitForPtyColumnsAtMost(
     await sendToTerminal(
       page,
       ptyId,
-      `node -e ${JSON.stringify(`console.log('${marker}:' + (process.stdout.columns || 0))`)}\r`
+      `${nodeTerminalCommand([
+        '-e',
+        `console.log('${marker}:' + (process.stdout.columns || 0))`
+      ])}\r`
     )
     const probeDeadline = Date.now() + Math.min(5_000, Math.max(0, deadline - Date.now()))
     while (Date.now() < probeDeadline) {
diff --git a/tests/e2e/terminal-long-table-scroll-restore.spec.ts b/tests/e2e/terminal-long-table-scroll-restore.spec.ts
index 620ab15bea8..3292ea27938 100644
--- a/tests/e2e/terminal-long-table-scroll-restore.spec.ts
+++ b/tests/e2e/terminal-long-table-scroll-restore.spec.ts
@@ -21,6 +21,7 @@ import {
   waitForPtyColumnsAtMost,
   waitForRenderedTerminalColumnsAtMost
 } from './terminal-column-probes'
+import { nodeTerminalCommand } from './terminal-node-command'
 import { waitForPtyShellEcho } from './terminal-pty-readiness'
 
 type TerminalRenderDiagnostics = {
@@ -620,7 +621,7 @@ test.describe('Terminal long table scroll restore repro', () => {
     writeFileSync(scriptPath, longMarkdownTableScript(runId))
 
     try {
-      await sendToTerminal(orcaPage, ptyId, `node ${JSON.stringify(scriptPath)}\r`)
+      await sendToTerminal(orcaPage, ptyId, `${nodeTerminalCommand([scriptPath])}\r`)
       await orcaPage.waitForTimeout(80)
       await switchToWorktree(orcaPage, secondWorktreeId)
       await waitForActiveTerminalManager(orcaPage, 30_000)
@@ -689,7 +690,7 @@ test.describe('Terminal long table scroll restore repro', () => {
     writeFileSync(scriptPath, narrowSignerMarkdownTableScript(runId))
 
     try {
-      await sendToTerminal(orcaPage, ptyId, `node ${JSON.stringify(scriptPath)}\r`)
+      await sendToTerminal(orcaPage, ptyId, `${nodeTerminalCommand([scriptPath])}\r`)
       await orcaPage.waitForTimeout(80)
       await switchToWorktree(orcaPage, secondWorktreeId)
       await waitForActiveTerminalManager(orcaPage, 30_000)
@@ -770,7 +771,7 @@ test.describe('Terminal long table scroll restore repro', () => {
     writeFileSync(scriptPath, emojiFixtureMarkdownTableScript(EMOJI_TABLE_FIXTURE, runId))
 
     try {
-      await sendToTerminal(orcaPage, ptyId, `node ${JSON.stringify(scriptPath)}\r`)
+      await sendToTerminal(orcaPage, ptyId, `${nodeTerminalCommand([scriptPath])}\r`)
       await orcaPage.waitForTimeout(80)
       await switchToWorktree(orcaPage, secondWorktreeId)
       await waitForActiveTerminalManager(orcaPage, 30_000)
diff --git a/tests/e2e/terminal-node-command.ts b/tests/e2e/terminal-node-command.ts
new file mode 100644
index 00000000000..140316497a5
--- /dev/null
+++ b/tests/e2e/terminal-node-command.ts
@@ -0,0 +1,20 @@
+function quotePosixShellArg(value: string): string {
+  return `'${value.replaceAll("'", "'\\''")}'`
+}
+
+function quotePowerShellArg(value: string): string {
+  return `'${value.replaceAll("'", "''")}'`
+}
+
+function quoteTerminalArg(value: string): string {
+  return process.platform === 'win32' ? quotePowerShellArg(value) : quotePosixShellArg(value)
+}
+
+export function nodeTerminalCommand(args: readonly string[]): string {
+  const nodeExecutable = quoteTerminalArg(process.execPath)
+  const executable = process.platform === 'win32' ? `& ${nodeExecutable}` : nodeExecutable
+
+  // Why: Windows CI shells do not always inherit setup-node's PATH, so E2E
+  // terminal probes must invoke the runner's Node executable directly.
+  return [executable, ...args.map(quoteTerminalArg)].join(' ')
+}
diff --git a/tests/e2e/terminal-opencode-emoji-table-rendering.spec.ts b/tests/e2e/terminal-opencode-emoji-table-rendering.spec.ts
index 92e1b9c8197..7bb19138067 100644
--- a/tests/e2e/terminal-opencode-emoji-table-rendering.spec.ts
+++ b/tests/e2e/terminal-opencode-emoji-table-rendering.spec.ts
@@ -15,6 +15,7 @@ import {
   analyzeRasterCursorCells,
   type TerminalRasterProbeTarget
 } from './terminal-cursor-raster-probe'
+import { nodeTerminalCommand } from './terminal-node-command'
 
 type TerminalRenderState = {
   coreCursorHidden: boolean | null
@@ -270,7 +271,7 @@ test.describe('OpenCode emoji table terminal rendering', () => {
     const scriptPath = path.join(testRepoPath, `.orca-opencode-emoji-table-${runId}.mjs`)
     writeFileSync(scriptPath, emojiTableScript(marker))
     try {
-      await sendToTerminal(orcaPage, ptyId, `node ${JSON.stringify(scriptPath)}\r`)
+      await sendToTerminal(orcaPage, ptyId, `${nodeTerminalCommand([scriptPath])}\r`)
       await waitForTerminalOutput(orcaPage, marker, 10_000)
       await orcaPage.waitForTimeout(250)
       await forceCursorProbeTheme(orcaPage)
diff --git a/tests/e2e/terminal-pty-readiness.ts b/tests/e2e/terminal-pty-readiness.ts
index e735a6f316c..7991f305339 100644
--- a/tests/e2e/terminal-pty-readiness.ts
+++ b/tests/e2e/terminal-pty-readiness.ts
@@ -2,6 +2,7 @@ import { randomUUID } from 'node:crypto'
 import type { Page } from '@stablyai/playwright-test'
 import { expect } from '@stablyai/playwright-test'
 import { sendToTerminal } from './helpers/terminal'
+import { nodeTerminalCommand } from './terminal-node-command'
 
 type TerminalPtyReadinessWindow = Window & {
   __paneManagers?: Map<
@@ -67,9 +68,10 @@ export async function waitForPtyPaneMounted(
 
 function encodedMarkerCommand(marker: string): string {
   const encoded = Buffer.from(marker, 'utf8').toString('base64')
-  return `node -e ${JSON.stringify(
+  return `${nodeTerminalCommand([
+    '-e',
     `console.log(Buffer.from('${encoded}', 'base64').toString('utf8'))`
-  )}\r`
+  ])}\r`
 }
 
 export async function waitForPtyShellEcho(
diff --git a/tests/e2e/terminal-raw-emoji-table-scroll-restore.spec.ts b/tests/e2e/terminal-raw-emoji-table-scroll-restore.spec.ts
index 167e1ba8540..043fbe61012 100644
--- a/tests/e2e/terminal-raw-emoji-table-scroll-restore.spec.ts
+++ b/tests/e2e/terminal-raw-emoji-table-scroll-restore.spec.ts
@@ -18,6 +18,7 @@ import {
   waitForTerminalOutput
 } from './helpers/terminal'
 import { scrollActiveTerminalToText } from './artificial-opencode-active-terminal-scroll'
+import { nodeTerminalCommand } from './terminal-node-command'
 
 type BrowserTerminalPane = {
   terminal: {
@@ -522,7 +523,7 @@ test.describe('Terminal raw emoji table scroll restore repro', () => {
       const frameTailMarker = rawEmojiFixtureFrameTailMarker(runId)
       // Why: the fixture marker is the shell-readiness signal here; an extra
       // Ctrl+C/Ctrl+U preflight can race Windows ConPTY startup and eat input.
-      await sendToTerminal(orcaPage, ptyId, `node ${JSON.stringify(scriptPath)}\r`)
+      await sendToTerminal(orcaPage, ptyId, `${nodeTerminalCommand([scriptPath])}\r`)
       // Why: Windows ConPTY can return the PowerShell prompt while xterm is
       // still flushing synchronized output if the pane is hidden immediately.
       // This golden is about restored table geometry, not shell-flush timing.