diff --git a/tests/src/common/ut_metadataparser.cpp b/tests/src/common/ut_metadataparser.cpp
index ef520b40..7a05f1da 100644
--- a/tests/src/common/ut_metadataparser.cpp
+++ b/tests/src/common/ut_metadataparser.cpp
@@ -80,7 +80,7 @@ TEST_F(UT_MetaDataParser, UT_MetaDataParser_makeMetaData_001)
     metadataparser.parse(metadata, noteData);
     metadata = "";
     metadataparser.makeMetaData(noteData, metadata);
-    EXPECT_EQ("{\"dataCount\":1,\"noteDatas\":[{\"text\":\"sdfgsgssrgstg\",\"type\":1}],\"voiceMaxId\":0}", metadata) << "htmlCode is empty";
+    EXPECT_EQ(QByteArrayLiteral("{\"dataCount\":1,\"noteDatas\":[{\"text\":\"sdfgsgssrgstg\",\"type\":1}],\"voiceMaxId\":0}"), metadata.toByteArray()) << "htmlCode is empty";
 
     noteData->htmlCode = "abc";
     metadataparser.makeMetaData(noteData, metadata);
diff --git a/tests/src/importolddata/tiptapmigration/ut_migrationjsonbuilder.cpp b/tests/src/importolddata/tiptapmigration/ut_migrationjsonbuilder.cpp
index 6eef419c..a58b7511 100644
--- a/tests/src/importolddata/tiptapmigration/ut_migrationjsonbuilder.cpp
+++ b/tests/src/importolddata/tiptapmigration/ut_migrationjsonbuilder.cpp
@@ -196,7 +196,7 @@ TEST(UT_MigrationJsonBuilder, GeneratedEnvelopePassesSchemaValidator)
     const QString path = writeTempEnvelope(envelope);
     QProcess validator;
     validator.setWorkingDirectory(findRepoRoot());
-    validator.start(QStringLiteral("node"), { QStringLiteral("web-editor/scripts/validate-envelope.mjs"), path });
+    validator.start(QStringLiteral("node"), { QStringLiteral("--import"), QStringLiteral("./web-editor/scripts/css-inline-loader.mjs"), QStringLiteral("web-editor/scripts/validate-envelope.mjs"), path });
     ASSERT_TRUE(validator.waitForFinished(30000));
     EXPECT_EQ(0, validator.exitCode()) << validator.readAllStandardError().toStdString();
     QFile::remove(path);
diff --git a/tests/src/importolddata/tiptapmigration/ut_migrationnotedataconverter.cpp b/tests/src/importolddata/tiptapmigration/ut_migrationnotedataconverter.cpp
index 7a8d86fd..289ecda3 100644
--- a/tests/src/importolddata/tiptapmigration/ut_migrationnotedataconverter.cpp
+++ b/tests/src/importolddata/tiptapmigration/ut_migrationnotedataconverter.cpp
@@ -91,7 +91,7 @@ void expectPassesValidators(const QJsonObject &envelope)
 
     QProcess validator;
     validator.setWorkingDirectory(repoRoot);
-    validator.start(QStringLiteral("node"), { QStringLiteral("web-editor/scripts/validate-envelope.mjs"), envelopeFile.fileName() });
+    validator.start(QStringLiteral("node"), { QStringLiteral("--import"), QStringLiteral("./web-editor/scripts/css-inline-loader.mjs"), QStringLiteral("web-editor/scripts/validate-envelope.mjs"), envelopeFile.fileName() });
     ASSERT_TRUE(validator.waitForFinished(30000));
     EXPECT_EQ(0, validator.exitCode()) << validator.readAllStandardError().toStdString();
 }
diff --git a/tests/src/task/ut_exportnoteworker.cpp b/tests/src/task/ut_exportnoteworker.cpp
index 1cb95e21..080b8f13 100644
--- a/tests/src/task/ut_exportnoteworker.cpp
+++ b/tests/src/task/ut_exportnoteworker.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2023-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -8,10 +8,12 @@
 #include "common/vnoteitem.h"
 
 #include <QApplication>
+#include <QDir>
 #include <QList>
 
 void UT_ExportNoteWorker::SetUp()
 {
+    QDir().mkpath(QStringLiteral("test"));
     VNOTE_ALL_NOTES_MAP *notes = VNoteDataManager::instance()->getAllNotesInFolder();
     if (notes && !notes->notes.isEmpty()) {
         VNOTE_ITEMS_MAP *tmp = notes->notes.first();
@@ -33,6 +35,7 @@ void UT_ExportNoteWorker::SetUp()
 void UT_ExportNoteWorker::TearDown()
 {
     delete note;
+    QDir("test").removeRecursively();
 }
 
 UT_ExportNoteWorker::UT_ExportNoteWorker()
diff --git a/web-editor/scripts/css-inline-loader.mjs b/web-editor/scripts/css-inline-loader.mjs
new file mode 100644
index 00000000..0aaee15a
--- /dev/null
+++ b/web-editor/scripts/css-inline-loader.mjs
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// Entry module for `node --import`: registers the CSS loader hook below so
+// that validate-envelope.mjs can import create-schema.js (which transitively
+// imports voice-block.css?inline) without a bundler.
+import { register } from 'node:module';
+import { pathToFileURL } from 'node:url';
+
+const hookURL = new URL('./css-loader-hook.mjs', import.meta.url);
+register(pathToFileURL(hookURL.pathname));
diff --git a/web-editor/scripts/css-loader-hook.mjs b/web-editor/scripts/css-loader-hook.mjs
new file mode 100644
index 00000000..2f77cfaa
--- /dev/null
+++ b/web-editor/scripts/css-loader-hook.mjs
@@ -0,0 +1,17 @@
+// SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// ESM loader hook: intercepts Vite-style CSS inline imports so that the
+// validator can run under plain Node.js (no bundler). Returns an empty
+// string for the CSS module default export.
+export async function load(url, context, nextLoad) {
+  if (url.includes('.css')) {
+    return {
+      format: 'module',
+      source: 'export default ""',
+      shortCircuit: true,
+    };
+  }
+  return nextLoad(url, context);
+}