diff --git a/test/lib/commands/edit.js b/test/lib/commands/edit.js
index 1943e8c5fb4ae..bf7bd3155bd4d 100644
--- a/test/lib/commands/edit.js
+++ b/test/lib/commands/edit.js
@@ -1,4 +1,5 @@
 const t = require('tap')
+const fs = require('fs')
 const path = require('path')
 const tspawk = require('../../fixtures/tspawk')
 const { load: loadMockNpm } = require('../../fixtures/mock-npm')
@@ -45,7 +46,14 @@ t.test('npm edit', async t => {
   spawk.spawn('testeditor', [semverPath])
   spawk.spawn(
     scriptShell,
-    args => args.includes('testinstall'),
+    args => {
+      const lastArg = args[args.length - 1]
+      const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+      const rightFilename = path.basename(lastArg).startsWith('install')
+      const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+        .trim().endsWith('testinstall')
+      return rightExtension && rightFilename && rightContents
+    },
     { cwd: semverPath }
   )
   await npm.exec('edit', ['semver'])
@@ -62,7 +70,14 @@ t.test('rebuild failure', async t => {
   spawk.spawn('testeditor', [semverPath])
   spawk.spawn(
     scriptShell,
-    args => args.includes('testinstall'),
+    args => {
+      const lastArg = args[args.length - 1]
+      const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+      const rightFilename = path.basename(lastArg).startsWith('install')
+      const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+        .trim().endsWith('testinstall')
+      return rightExtension && rightFilename && rightContents
+    },
     { cwd: semverPath }
   ).exit(1).stdout('test error')
   await t.rejects(
@@ -98,7 +113,14 @@ t.test('npm edit editor has flags', async t => {
   spawk.spawn('testeditor', ['--flag', semverPath])
   spawk.spawn(
     scriptShell,
-    args => args.includes('testinstall'),
+    args => {
+      const lastArg = args[args.length - 1]
+      const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+      const rightFilename = path.basename(lastArg).startsWith('install')
+      const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+        .trim().endsWith('testinstall')
+      return rightExtension && rightFilename && rightContents
+    },
     { cwd: semverPath }
   )
   await npm.exec('edit', ['semver'])
diff --git a/test/lib/commands/restart.js b/test/lib/commands/restart.js
index 84bd93d8c99ca..428ecb6b2a704 100644
--- a/test/lib/commands/restart.js
+++ b/test/lib/commands/restart.js
@@ -1,3 +1,5 @@
+const fs = require('fs')
+const path = require('path')
 const t = require('tap')
 const tspawk = require('../../fixtures/tspawk')
 const { load: loadMockNpm } = require('../../fixtures/mock-npm')
@@ -26,8 +28,12 @@ t.test('should run restart script from package.json', async t => {
   })
   const [scriptShell] = makeSpawnArgs({ path: npm.prefix })
   const script = spawk.spawn(scriptShell, (args) => {
-    t.ok(args.includes('node ./test-restart.js "foo"'), 'ran restart script with extra args')
-    return true
+    const lastArg = args[args.length - 1]
+    const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+    const rightFilename = path.basename(lastArg).startsWith('restart')
+    const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+      .trim().endsWith('foo')
+    return rightExtension && rightFilename && rightContents
   })
   await npm.exec('restart', ['foo'])
   t.ok(script.called, 'script ran')
diff --git a/test/lib/commands/start.js b/test/lib/commands/start.js
index 8fc73493d20a9..8f0d3c38b0935 100644
--- a/test/lib/commands/start.js
+++ b/test/lib/commands/start.js
@@ -1,3 +1,5 @@
+const fs = require('fs')
+const path = require('path')
 const t = require('tap')
 const tspawk = require('../../fixtures/tspawk')
 const { load: loadMockNpm } = require('../../fixtures/mock-npm')
@@ -10,7 +12,6 @@ const spawk = tspawk(t)
 const makeSpawnArgs = require('@npmcli/run-script/lib/make-spawn-args.js')
 
 t.test('should run start script from package.json', async t => {
-  t.plan(2)
   const { npm } = await loadMockNpm(t, {
     prefixDir: {
       'package.json': JSON.stringify({
@@ -27,8 +28,12 @@ t.test('should run start script from package.json', async t => {
   })
   const [scriptShell] = makeSpawnArgs({ path: npm.prefix })
   const script = spawk.spawn(scriptShell, (args) => {
-    t.ok(args.includes('node ./test-start.js "foo"'), 'ran start script with extra args')
-    return true
+    const lastArg = args[args.length - 1]
+    const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+    const rightFilename = path.basename(lastArg).startsWith('start')
+    const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+      .trim().endsWith('foo')
+    return rightExtension && rightFilename && rightContents
   })
   await npm.exec('start', ['foo'])
   t.ok(script.called, 'script ran')
diff --git a/test/lib/commands/stop.js b/test/lib/commands/stop.js
index f2aef21899f6c..234eb2cf45382 100644
--- a/test/lib/commands/stop.js
+++ b/test/lib/commands/stop.js
@@ -1,3 +1,5 @@
+const fs = require('fs')
+const path = require('path')
 const t = require('tap')
 const tspawk = require('../../fixtures/tspawk')
 const { load: loadMockNpm } = require('../../fixtures/mock-npm')
@@ -26,8 +28,12 @@ t.test('should run stop script from package.json', async t => {
   })
   const [scriptShell] = makeSpawnArgs({ path: npm.prefix })
   const script = spawk.spawn(scriptShell, (args) => {
-    t.ok(args.includes('node ./test-stop.js "foo"'), 'ran stop script with extra args')
-    return true
+    const lastArg = args[args.length - 1]
+    const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+    const rightFilename = path.basename(lastArg).startsWith('stop')
+    const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+      .trim().endsWith('foo')
+    return rightExtension && rightFilename && rightContents
   })
   await npm.exec('stop', ['foo'])
   t.ok(script.called, 'script ran')
diff --git a/test/lib/commands/test.js b/test/lib/commands/test.js
index e9ea0a3c834aa..ee6dae9024c5a 100644
--- a/test/lib/commands/test.js
+++ b/test/lib/commands/test.js
@@ -1,3 +1,5 @@
+const fs = require('fs')
+const path = require('path')
 const t = require('tap')
 const tspawk = require('../../fixtures/tspawk')
 const { load: loadMockNpm } = require('../../fixtures/mock-npm')
@@ -26,8 +28,12 @@ t.test('should run test script from package.json', async t => {
   })
   const [scriptShell] = makeSpawnArgs({ path: npm.prefix })
   const script = spawk.spawn(scriptShell, (args) => {
-    t.ok(args.includes('node ./test-test.js "foo"'), 'ran test script with extra args')
-    return true
+    const lastArg = args[args.length - 1]
+    const rightExtension = lastArg.endsWith('.cmd') || lastArg.endsWith('.sh')
+    const rightFilename = path.basename(lastArg).startsWith('test')
+    const rightContents = fs.readFileSync(lastArg, { encoding: 'utf8' })
+      .trim().endsWith('foo')
+    return rightExtension && rightFilename && rightContents
   })
   await npm.exec('test', ['foo'])
   t.ok(script.called, 'script ran')
diff --git a/workspaces/arborist/tap-snapshots/test/arborist/rebuild.js.test.cjs b/workspaces/arborist/tap-snapshots/test/arborist/rebuild.js.test.cjs
index 3a500be6571ad..3a7ee889012d9 100644
--- a/workspaces/arborist/tap-snapshots/test/arborist/rebuild.js.test.cjs
+++ b/workspaces/arborist/tap-snapshots/test/arborist/rebuild.js.test.cjs
@@ -8,7 +8,7 @@
 exports[`test/arborist/rebuild.js TAP verify dep flags in script environments > saved script results 1`] = `
 Array [
   Object {
-    "cmd": "node ../../env.js",
+    "cmd": "{TMP}/postinstall-{TIMESTAMP}",
     "code": 0,
     "event": "postinstall",
     "pkg": Object {
@@ -30,7 +30,7 @@ Array [
     "stdout": "npm_package_dev\\n",
   },
   Object {
-    "cmd": "node ../../env.js",
+    "cmd": "{TMP}/postinstall-{TIMESTAMP}",
     "code": 0,
     "event": "postinstall",
     "pkg": Object {
@@ -46,7 +46,7 @@ Array [
     "stdout": "npm_package_dev_optional\\n",
   },
   Object {
-    "cmd": "node ../../env.js",
+    "cmd": "{TMP}/postinstall-{TIMESTAMP}",
     "code": 0,
     "event": "postinstall",
     "pkg": Object {
@@ -66,7 +66,7 @@ Array [
     ),
   },
   Object {
-    "cmd": "node ../../env.js",
+    "cmd": "{TMP}/postinstall-{TIMESTAMP}",
     "code": 0,
     "event": "postinstall",
     "pkg": Object {
diff --git a/workspaces/arborist/test/arborist/rebuild.js b/workspaces/arborist/test/arborist/rebuild.js
index 37551c7483386..cac811aacf99e 100644
--- a/workspaces/arborist/test/arborist/rebuild.js
+++ b/workspaces/arborist/test/arborist/rebuild.js
@@ -2,6 +2,7 @@ const t = require('tap')
 const _trashList = Symbol.for('trashList')
 const Arborist = require('../../lib/arborist/index.js')
 const { resolve, dirname } = require('path')
+const os = require('os')
 const fs = require('fs')
 const fixtures = resolve(__dirname, '../fixtures')
 const relpath = require('../../lib/relpath.js')
@@ -185,6 +186,11 @@ t.test('verify dep flags in script environments', async t => {
       localeCompare(patha, pathb) || localeCompare(eventa, eventb))
     .map(({ pkg, event, cmd, code, signal, stdout, stderr }) =>
       ({ pkg, event, cmd, code, signal, stdout, stderr }))
+  t.cleanSnapshot = (input) => {
+    return input.replace(new RegExp(os.tmpdir().replace(/\\/g, '\\\\\\\\'), 'g'), '{TMP}')
+      .replace(/\\\\/g, '/')
+      .replace(/(\d+)\.(?:sh|cmd)/g, '{TIMESTAMP}')
+  }
   t.matchSnapshot(saved, 'saved script results')
 
   for (const [pkg, flags] of Object.entries(expect)) {