diff --git a/package.json b/package.json
index 8c0c169..74688f9 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "preReleaseHook": "prepareRelease",
     "prepareRelease": "npm run clean && npm i && npm run build && npm run bundle && npm run denoify && npm run test && npm run test:deno && npm run test:browser",
     "test": "npm run test:nodejs && npm run test:jsx-runtime:client && npm run test:jsx-runtime:server",
-    "test:nodejs": "npm run clean:test && tsc --project tsconfig.test.json && jest \"test/.+\\.test.js$\" && npm run clean:test",
+    "test:nodejs": "npm run clean:test && tsc --project tsconfig.test.json && node ./test/scripts.mjs add-jest-environment && jest \"test/.+\\.ssr.test.js$\" && npm run clean:test",
     "test:jsx-runtime:client": "tsc --project tsconfig.test.jsx-runtime.json && jest --coverage=false \"test.jsx-runtime/.+\\.test.js$\"",
     "test:jsx-runtime:server": "tsc --project tsconfig.test.jsx-runtime.json && node test.jsx-runtime/nodejs/server.js",
     "test:browser": "rimraf .nyc_output coverage && webpack -c webpack/webpack.bundle.instrumented.js && tsc -p scripts/browserTest/tsconfig.json && node scripts/browserTest/index.mjs --coverage && npx nyc report --exclude \"src/{bundles,dev,htm,ui}/**\" --exclude \"src/mod.ts\" --reporter=text --reporter=html --reporter=lcov",
diff --git a/src/ssr.ts b/src/ssr.ts
index dc6c1cd..978132b 100644
--- a/src/ssr.ts
+++ b/src/ssr.ts
@@ -56,7 +56,9 @@ export const renderSSR = (component: any, options: { pathname?: string; clearSta
   initSSR(pathname)
   if (clearState) _state.clear()
 
-  return render(component, null, true).join('') as string
+  const tmp = render(component, null, true) as string | string[]
+  if (Array.isArray(tmp)) return tmp.join('')
+  else return Array.from(tmp).join('')
 }
 
 export const clearState = () => {
diff --git a/test/scripts.mjs b/test/scripts.mjs
new file mode 100644
index 0000000..435000d
--- /dev/null
+++ b/test/scripts.mjs
@@ -0,0 +1,31 @@
+// @ts-check
+
+import { readFile, readdir, writeFile } from "fs/promises"
+import { resolve } from "path"
+
+const args = process.argv.splice(2)
+const arg0 = args[0]
+
+async function* getFiles(dir) {
+  const dirents = await readdir(dir, { withFileTypes: true });
+  for (const dirent of dirents) {
+    const res = resolve(dir, dirent.name);
+    if (dirent.isDirectory()) {
+      yield* getFiles(res);
+    } else {
+      yield res;
+    }
+  }
+}
+
+if (arg0 === "add-jest-environment") {
+  const str = "/**\n* @jest-environment node\n*/\n\n"
+
+  for await (const f of getFiles("test")) {
+    if (/ssr\.test\.js/.test(f)) {
+      const file = await readFile(f, { encoding: "utf-8" })
+      await writeFile(f, str + file, { encoding: "utf-8" })
+    }
+  }
+
+}
\ No newline at end of file