diff --git a/scripts/lib/portable-package.mjs b/scripts/lib/portable-package.mjs
index 7f7afb6..20e8aaa 100644
--- a/scripts/lib/portable-package.mjs
+++ b/scripts/lib/portable-package.mjs
@@ -208,7 +208,7 @@ async function waitForHealth(child) {
   throw new Error("Packaged API did not become healthy on fixed port 43121.", { cause: lastError });
 }
 
-async function verifyExtractedPackage(zipPath, packageName, expectedSupport) {
+export async function verifyExtractedPackage(zipPath, packageName, expectedSupport) {
   const extractRoot = mkdtempSync(join(tmpdir(), "dada-wp0-09-"));
   try {
     const escapedZip = zipPath.replaceAll("'", "''");
@@ -235,22 +235,36 @@ async function verifyExtractedPackage(zipPath, packageName, expectedSupport) {
     });
     try {
       const health = await waitForHealth(api);
+      const brands = [
+        { brand: "Not_A Brand", version: "99" },
+        { brand: "Chromium", version: String(expectedSupport.major) },
+        { brand: expectedSupport.brand, version: String(expectedSupport.major) },
+      ];
+      const fullVersionList = [
+        { brand: "Not_A Brand", version: "99.0.0.0" },
+        { brand: "Chromium", version: expectedSupport.fullVersion },
+        { brand: expectedSupport.brand, version: expectedSupport.fullVersion },
+      ];
+      const serializeBrands = (values) => values.map(({ brand, version }) => `"${brand}";v="${version}"`).join(", ");
       const releaseGate = await fetch(`http://127.0.0.1:${fixedPort}/api/v1/support/check`, {
         body: JSON.stringify({
-          brands: [{ brand: expectedSupport.brand, version: String(expectedSupport.major) }],
-          full_version_list: [{ brand: expectedSupport.brand, version: expectedSupport.fullVersion }],
+          brands,
+          full_version_list: fullVersionList,
           platform: "Windows",
         }),
         headers: {
           "content-type": "application/json",
-          "sec-ch-ua": `"${expectedSupport.brand}";v="${expectedSupport.major}"`,
-          "sec-ch-ua-full-version-list": `"${expectedSupport.brand}";v="${expectedSupport.fullVersion}"`,
+          host: `127.0.0.1:${fixedPort}`,
+          origin: `http://127.0.0.1:${fixedPort}`,
+          "sec-ch-ua": serializeBrands(brands),
+          "sec-ch-ua-full-version-list": serializeBrands(fullVersionList),
           "sec-ch-ua-platform": '"Windows"',
         },
         method: "POST",
       });
       if (releaseGate.status !== expectedSupport.statusCode) {
-        throw new Error(`Packaged RELEASE.json support gate returned ${releaseGate.status}; expected ${expectedSupport.statusCode}.`);
+        const responseBody = await releaseGate.text();
+        throw new Error(`Packaged RELEASE.json support gate returned ${releaseGate.status}; expected ${expectedSupport.statusCode}: ${responseBody}`);
       }
       return {
         api: { executable: "runtime/node.exe", health, pid: api.pid, release_gate: { status_code: releaseGate.status }, status: "passed" },