diff --git a/test/setupPaths.js b/test/setupPaths.js
new file mode 100644
index 00000000..f579a663
--- /dev/null
+++ b/test/setupPaths.js
@@ -0,0 +1,7 @@
+// enhance require() to support project paths and typescript.
+const path = require('path');
+const appModulePath = require('app-module-path');
+const root = path.dirname(__dirname);
+appModulePath.addPath(path.join(root, "_build"));
+appModulePath.addPath(path.join(root, "_build/core"));
+appModulePath.addPath(path.join(root, "_build/ext"));
diff --git a/test/upgradeDocument b/test/upgradeDocument
new file mode 100755
index 00000000..be3f6cc3
--- /dev/null
+++ b/test/upgradeDocument
@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+require('./setupPaths');
+require('test/upgradeDocumentImpl').main().catch(e => console.error(String(e)));
diff --git a/test/upgradeDocumentImpl.ts b/test/upgradeDocumentImpl.ts
new file mode 100644
index 00000000..499c28a0
--- /dev/null
+++ b/test/upgradeDocumentImpl.ts
@@ -0,0 +1,43 @@
+/**
+ * Upgrade one or more documents (both the DocStorage and schema migrations).
+ *
+ * Usage:
+ *    test/upgradeDocument <docPaths...>
+ */
+import {copyFile} from 'app/server/lib/docUtils';
+import {createDocTools} from 'test/server/docTools';
+import log from 'app/server/lib/log';
+import * as fs from "fs";
+
+export async function main() {
+  const docPaths = process.argv.slice(2);
+  if (docPaths.length === 0) {
+    console.log(`Usage:\n    test/upgradeDocument path/to/doc.grist ...\n`);
+    throw new Error("Document argument required");
+  }
+  for (const docPath of docPaths) {
+    if (!docPath.endsWith('.grist')) {
+      throw new Error(`Document path should have .grist extension: ${docPath}`);
+    }
+    if (!fs.existsSync(docPath)) {
+      throw new Error(`Document path doesn't exist: ${docPath}`);
+    }
+  }
+
+  const prevLogLevel = log.transports.file.level;
+  log.transports.file.level = 'warn';
+  const docTools = createDocTools();
+  await docTools.before();
+  try {
+    for (const docPath of docPaths) {
+      console.log(`Upgrading ${docPath}`);
+      const activeDoc = await docTools.loadLocalDoc(docPath);
+      await activeDoc.waitForInitialization();
+      await activeDoc.shutdown();
+      await copyFile(docTools.getStorageManager().getPath(activeDoc.docName), docPath);
+    }
+  } finally {
+    await docTools.after();
+    log.transports.file.level = prevLogLevel;
+  }
+}