diff --git a/utils/roll_browser.js b/utils/roll_browser.js
index 4d9167f0f7..ba2422d77e 100755
--- a/utils/roll_browser.js
+++ b/utils/roll_browser.js
@@ -109,7 +109,7 @@ Example:
     // 5. Generate types.
     console.log('\nGenerating protocol types...');
     const executablePath = registry.findExecutable(browserName).executablePathOrDie();
-    await protocolGenerator.generateProtocol(browserName, executablePath).catch(console.warn);
+    await protocolGenerator.generateProtocol(browserName, executablePath);
 
     // 6. Update docs.
     console.log('\nUpdating documentation...');