diff --git a/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js b/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
index bd51a1c8fc5a..b3ae12bf89a7 100644
--- a/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
+++ b/lighthouse-cli/test/smokehouse/dobetterweb/dbw-expectations.js
@@ -138,6 +138,14 @@ module.exports = [
           ],
         },
       },
+      'js-libraries': {
+        score: 1,
+        details: {
+          items: [{
+            name: 'jQuery',
+          }],
+        },
+      },
     },
   },
 ];
diff --git a/lighthouse-core/gather/gatherers/dobetterweb/js-libraries.js b/lighthouse-core/gather/gatherers/dobetterweb/js-libraries.js
index 2d6a0c7b3ec0..040690f97422 100644
--- a/lighthouse-core/gather/gatherers/dobetterweb/js-libraries.js
+++ b/lighthouse-core/gather/gatherers/dobetterweb/js-libraries.js
@@ -29,9 +29,9 @@ function detectLibraries() {
   // d41d8cd98f00b204e9800998ecf8427e_ is a consistent prefix used by the detect libraries
   // see https://github.com/HTTPArchive/httparchive/issues/77#issuecomment-291320900
   // @ts-ignore - injected libDetectorSource var
-  Object.entries(d41d8cd98f00b204e9800998ecf8427e_LibraryDetectorTests).forEach(([name, lib]) => {
+  Object.entries(d41d8cd98f00b204e9800998ecf8427e_LibraryDetectorTests).forEach(async ([name, lib]) => { // eslint-disable-line max-len
     try {
-      const result = lib.test(window);
+      const result = await lib.test(window);
       if (result) {
         libraries.push({
           name: name,