diff --git a/lib/main.js b/lib/main.js
index 5a0b5ff..9f45beb 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -28,7 +28,9 @@ export default async function * customReporter (source) {
       type !== 'test:pass' &&
       type !== 'test:fail' &&
       type !== 'test:plan' &&
-      type !== 'test:diagnostic'
+      type !== 'test:diagnostic' &&
+      type !== 'test:stdout' &&
+      type !== 'test:stderr'
     ) {
       continue;
     }
@@ -111,6 +113,12 @@ export default async function * customReporter (source) {
         // Emitted when context.diagnostic is called.
         diagnostics.push(data);
         break;
+      case 'test:stdout':
+        process.stdout.write(data.message);
+        break;
+      case 'test:stderr':
+        process.stderr.write(data.message);
+        break;
     }
   }