Fix an iterable_contains_unrelated_type warning.

Change-Id: Ie9b5ff4298b1213ccec8764728a9a40475e56603
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/193340
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
diff --git a/pkg/test_runner/lib/src/testing_servers.dart b/pkg/test_runner/lib/src/testing_servers.dart
index bbd5cfd..984f83c 100644
--- a/pkg/test_runner/lib/src/testing_servers.dart
+++ b/pkg/test_runner/lib/src/testing_servers.dart
@@ -7,7 +7,6 @@
 import 'dart:io';
 
 import 'package:package_config/package_config.dart';
-
 import 'package:test_runner/src/configuration.dart';
 import 'package:test_runner/src/repository.dart';
 import 'package:test_runner/src/utils.dart';
diff --git a/tools/bots/test_matrix.json b/tools/bots/test_matrix.json
index 7067b9a..c244d73 100644
--- a/tools/bots/test_matrix.json
+++ b/tools/bots/test_matrix.json
@@ -3303,6 +3303,7 @@
           "script": "out/ReleaseX64/dart-sdk/bin/dart",
           "arguments": [
             "analyze",
+            "--fatal-infos",
             "pkg/test_runner"
           ]
         },