diff --git a/test/backend/chaos_monkey_test.dart b/test/backend/chaos_monkey_test.dart
index df7af5d..f6715a4 100644
--- a/test/backend/chaos_monkey_test.dart
+++ b/test/backend/chaos_monkey_test.dart
@@ -32,8 +32,13 @@ Future<ImapClient> _imapConnectPlain(
   String username,
   String password,
 ) async {
-  final client = ImapClient(defaultResponseTimeout: const Duration(seconds: 20));
-  await client.connectToServer(account.imapHost, account.imapPort, isSecure: false);
+  final client =
+      ImapClient(defaultResponseTimeout: const Duration(seconds: 20));
+  await client.connectToServer(
+    account.imapHost,
+    account.imapPort,
+    isSecure: false,
+  );
   await client.login(username, password);
   return client;
 }
@@ -47,7 +52,11 @@ Future<SmtpClient> _smtpConnectPlain(
   final domain =
       atIndex != -1 ? account.email.substring(atIndex + 1) : account.smtpHost;
   final client = SmtpClient(domain);
-  await client.connectToServer(account.smtpHost, account.smtpPort, isSecure: false);
+  await client.connectToServer(
+    account.smtpHost,
+    account.smtpPort,
+    isSecure: false,
+  );
   await client.ehlo();
   await client.authenticate(username, password);
   return client;
@@ -122,15 +131,16 @@ void main() {
 
   tearDown(() => db.close());
 
-  test('chaos monkey — random operations do not crash the repository', () async {
-    final seedStr = _env('CHAOS_SEED', '');
+  test('chaos monkey — random operations do not crash the repository',
+      () async {
+    final seedStr = _env('CHAOS_SEED');
     final seed = seedStr.isEmpty
         ? DateTime.now().millisecondsSinceEpoch
         : int.parse(seedStr);
     final rounds = int.parse(_env('CHAOS_ROUNDS', '30'));
     final rng = Random(seed);
 
-    print('chaos-monkey: seed=$seed rounds=$rounds');
+    stdout.writeln('chaos-monkey: seed=$seed rounds=$rounds');
 
     // Seed INBOX with a few messages so early rounds have something to act on.
     for (var i = 0; i < 3; i++) {
@@ -149,7 +159,7 @@ void main() {
 
     for (var round = 0; round < rounds; round++) {
       final action = rng.nextInt(8);
-      print('chaos-monkey: round=$round action=$action');
+      stdout.writeln('chaos-monkey: round=$round action=$action');
 
       switch (action) {
         case 0: // sync INBOX
@@ -190,8 +200,9 @@ void main() {
           await emails.setFlag(e.id, flagged: !e.isFlagged);
 
         case 6: // flush pending changes to server
-          final flushed = await emails.flushPendingChanges(account.id, userPass);
-          print('chaos-monkey: flushed $flushed pending changes');
+          final flushed =
+              await emails.flushPendingChanges(account.id, userPass);
+          stdout.writeln('chaos-monkey: flushed $flushed pending changes');
 
         case 7: // delete random email
           final inbox = await emails.observeEmails(account.id, 'INBOX').first;
@@ -203,8 +214,8 @@ void main() {
 
     // Final flush and sync to confirm the server is in a consistent state.
     final flushed = await emails.flushPendingChanges(account.id, userPass);
-    print('chaos-monkey: final flush flushed=$flushed');
+    stdout.writeln('chaos-monkey: final flush flushed=$flushed');
     final result = await emails.syncEmails(account.id, 'INBOX');
-    print('chaos-monkey: final sync fetched=${result.fetched}');
+    stdout.writeln('chaos-monkey: final sync fetched=${result.fetched}');
   });
 }