diff --git a/packages/sanity/src/_internal/cli/threads/extractManifest.ts b/packages/sanity/src/_internal/cli/threads/extractManifest.ts
index e3080dce09f..3efa233607e 100644
--- a/packages/sanity/src/_internal/cli/threads/extractManifest.ts
+++ b/packages/sanity/src/_internal/cli/threads/extractManifest.ts
@@ -9,15 +9,15 @@ export interface ExtractManifestWorkerData {
   workDir: string
 }
 
-if (isMainThread || !parentPort) {
-  throw new Error('This module must be run as a worker thread')
-}
+async function main() {
+  if (isMainThread || !parentPort) {
+    throw new Error('This module must be run as a worker thread')
+  }
 
-const opts = _workerData as ExtractManifestWorkerData
+  const opts = _workerData as ExtractManifestWorkerData
 
-const cleanup = mockBrowserEnvironment(opts.workDir)
+  const cleanup = mockBrowserEnvironment(opts.workDir)
 
-async function main() {
   try {
     const workspaces = await getStudioWorkspaces({basePath: opts.workDir})
 
@@ -30,4 +30,4 @@ async function main() {
   }
 }
 
-main()
+main().then(() => process.exit())
diff --git a/packages/sanity/src/_internal/cli/threads/extractSchema.ts b/packages/sanity/src/_internal/cli/threads/extractSchema.ts
index 8fb02fc00df..1c0f250bf44 100644
--- a/packages/sanity/src/_internal/cli/threads/extractSchema.ts
+++ b/packages/sanity/src/_internal/cli/threads/extractSchema.ts
@@ -19,14 +19,14 @@ export interface ExtractSchemaWorkerResult {
   schema: ReturnType<typeof extractSchema>
 }
 
-if (isMainThread || !parentPort) {
-  throw new Error('This module must be run as a worker thread')
-}
+async function main() {
+  if (isMainThread || !parentPort) {
+    throw new Error('This module must be run as a worker thread')
+  }
 
-const opts = _workerData as ExtractSchemaWorkerData
-const cleanup = mockBrowserEnvironment(opts.workDir)
+  const opts = _workerData as ExtractSchemaWorkerData
+  const cleanup = mockBrowserEnvironment(opts.workDir)
 
-async function main() {
   try {
     if (opts.format !== 'groq-type-nodes') {
       throw new Error(`Unsupported format: "${opts.format}"`)
@@ -48,7 +48,7 @@ async function main() {
   }
 }
 
-main()
+main().then(() => process.exit())
 
 function getWorkspace({
   workspaces,
diff --git a/packages/sanity/src/_internal/cli/threads/getGraphQLAPIs.ts b/packages/sanity/src/_internal/cli/threads/getGraphQLAPIs.ts
index c0555e5f907..5330202c3cd 100644
--- a/packages/sanity/src/_internal/cli/threads/getGraphQLAPIs.ts
+++ b/packages/sanity/src/_internal/cli/threads/getGraphQLAPIs.ts
@@ -9,11 +9,15 @@ import {type Workspace} from 'sanity'
 import {type SchemaDefinitionish, type TypeResolvedGraphQLAPI} from '../actions/graphql/types'
 import {getStudioWorkspaces} from '../util/getStudioWorkspaces'
 
-if (isMainThread || !parentPort) {
-  throw new Error('This module must be run as a worker thread')
+async function main() {
+  if (isMainThread || !parentPort) {
+    throw new Error('This module must be run as a worker thread')
+  }
+
+  await getGraphQLAPIsForked(parentPort)
 }
 
-getGraphQLAPIsForked(parentPort)
+main().then(() => process.exit())
 
 async function getGraphQLAPIsForked(parent: MessagePort): Promise<void> {
   const {cliConfig, cliConfigPath, workDir} = workerData
diff --git a/packages/sanity/src/_internal/cli/threads/validateDocuments.ts b/packages/sanity/src/_internal/cli/threads/validateDocuments.ts
index cefeae6dca1..3c917cd397f 100644
--- a/packages/sanity/src/_internal/cli/threads/validateDocuments.ts
+++ b/packages/sanity/src/_internal/cli/threads/validateDocuments.ts
@@ -129,7 +129,7 @@ async function* readerToGenerator(reader: ReadableStreamDefaultReader<Uint8Array
   }
 }
 
-validateDocuments()
+main().then(() => process.exit())
 
 async function loadWorkspace() {
   const workspaces = await getStudioWorkspaces({basePath: workDir, configPath})
@@ -302,7 +302,7 @@ async function checkReferenceExistence({
   return {existingIds}
 }
 
-async function validateDocuments() {
+async function main() {
   // note: this is dynamically imported because this module is ESM only and this
   // file gets compiled to CJS at this time
   const {default: pMap} = await import('p-map')
diff --git a/packages/sanity/src/_internal/cli/threads/validateSchema.ts b/packages/sanity/src/_internal/cli/threads/validateSchema.ts
index ae4990ce922..2045d03ae20 100644
--- a/packages/sanity/src/_internal/cli/threads/validateSchema.ts
+++ b/packages/sanity/src/_internal/cli/threads/validateSchema.ts
@@ -25,53 +25,57 @@ const {
   level = 'warning',
 } = _workerData as ValidateSchemaWorkerData
 
-if (isMainThread || !parentPort) {
-  throw new Error('This module must be run as a worker thread')
-}
+async function main() {
+  if (isMainThread || !parentPort) {
+    throw new Error('This module must be run as a worker thread')
+  }
 
-const cleanup = mockBrowserEnvironment(workDir)
+  const cleanup = mockBrowserEnvironment(workDir)
 
-try {
-  const workspaces = getStudioConfig({basePath: workDir})
+  try {
+    const workspaces = getStudioConfig({basePath: workDir})
 
-  if (!workspaces.length) {
-    throw new Error(`Configuration did not return any workspaces.`)
-  }
-
-  let workspace
-  if (workspaceName) {
-    workspace = workspaces.find((w) => w.name === workspaceName)
-    if (!workspace) {
-      throw new Error(`Could not find any workspaces with name \`${workspaceName}\``)
+    if (!workspaces.length) {
+      throw new Error(`Configuration did not return any workspaces.`)
     }
-  } else {
-    if (workspaces.length !== 1) {
-      throw new Error(
-        "Multiple workspaces found. Please specify which workspace to use with '--workspace'.",
-      )
+
+    let workspace
+    if (workspaceName) {
+      workspace = workspaces.find((w) => w.name === workspaceName)
+      if (!workspace) {
+        throw new Error(`Could not find any workspaces with name \`${workspaceName}\``)
+      }
+    } else {
+      if (workspaces.length !== 1) {
+        throw new Error(
+          "Multiple workspaces found. Please specify which workspace to use with '--workspace'.",
+        )
+      }
+      workspace = workspaces[0]
     }
-    workspace = workspaces[0]
-  }
 
-  const schemaTypes = resolveSchemaTypes({
-    config: workspace,
-    context: {dataset: workspace.dataset, projectId: workspace.projectId},
-  })
+    const schemaTypes = resolveSchemaTypes({
+      config: workspace,
+      context: {dataset: workspace.dataset, projectId: workspace.projectId},
+    })
 
-  const validation = groupProblems(validateSchema(schemaTypes).getTypes())
+    const validation = groupProblems(validateSchema(schemaTypes).getTypes())
 
-  const result: ValidateSchemaWorkerResult = {
-    validation: validation
-      .map((group) => ({
-        ...group,
-        problems: group.problems.filter((problem) =>
-          level === 'error' ? problem.severity === 'error' : true,
-        ),
-      }))
-      .filter((group) => group.problems.length),
-  }
+    const result: ValidateSchemaWorkerResult = {
+      validation: validation
+        .map((group) => ({
+          ...group,
+          problems: group.problems.filter((problem) =>
+            level === 'error' ? problem.severity === 'error' : true,
+          ),
+        }))
+        .filter((group) => group.problems.length),
+    }
 
-  parentPort?.postMessage(result)
-} finally {
-  cleanup()
+    parentPort?.postMessage(result)
+  } finally {
+    cleanup()
+  }
 }
+
+main().then(() => process.exit())