diff --git a/lib/reporters/verbose.js b/lib/reporters/verbose.js
index 902017868..0af9565dd 100644
--- a/lib/reporters/verbose.js
+++ b/lib/reporters/verbose.js
@@ -26,7 +26,7 @@ VerboseReporter.prototype.test = function (test) {
 	}
 
 	if (this.api.fileCount === 1 && this.api.testCount === 1 && test.title === '[anonymous]') {
-		return null;
+		return undefined;
 	}
 
 	// display duration only over a threshold
diff --git a/test/reporters/verbose.js b/test/reporters/verbose.js
index 1b189bc14..48a8b2e47 100644
--- a/test/reporters/verbose.js
+++ b/test/reporters/verbose.js
@@ -70,7 +70,7 @@ test('don\'t display test title if there is only one anonymous test', function (
 		title: '[anonymous]'
 	});
 
-	t.is(output, null);
+	t.is(output, undefined);
 	t.end();
 });