diff --git a/lib/Launcher.js b/lib/Launcher.js
index 76311858..7afd8d72 100644
--- a/lib/Launcher.js
+++ b/lib/Launcher.js
@@ -92,7 +92,7 @@ class Launcher {
     if (typeof chromeExecutable !== 'string') {
       const downloader = Downloader.createDefault();
       const revisionInfo = downloader.revisionInfo(downloader.currentPlatform(), ChromiumRevision);
-      console.assert(revisionInfo.downloaded, `Chromium revision is not downloaded. Run "npm install"`);
+      console.assert(revisionInfo.downloaded, `Chromium revision is not downloaded. Run "yarn install" or "npm install"`);
       chromeExecutable = revisionInfo.executablePath;
     }
     if (Array.isArray(options.args))