diff --git a/test/api/route/messages_test.dart b/test/api/route/messages_test.dart
index c840c84721..de4824696b 100644
--- a/test/api/route/messages_test.dart
+++ b/test/api/route/messages_test.dart
@@ -454,6 +454,28 @@ void main() {
     });
   });
 
+  group('markAllAsRead', () {
+    Future<MarkAllAsReadResult> checkMarkAllAsRead(
+      FakeApiConnection connection, {
+      required Map<String, String> expected,
+    }) async {
+      connection.prepare(json: MarkAllAsReadResult(complete: true).toJson());
+      final result = await markAllAsRead(connection);
+      check(connection.lastRequest).isNotNull().isA<http.Request>()
+        ..method.equals('POST')
+        ..url.path.equals('/api/v1/mark_all_as_read')
+        ..bodyFields.deepEquals(expected);
+      return result;
+    }
+
+    test('smoke', () {
+      return FakeApiConnection.with_((connection) async {
+        final result = await checkMarkAllAsRead(connection, expected: {});
+        check(result.complete).isTrue();
+      });
+    });
+  });
+
   group('markStreamAsRead', () {
     Future<void> checkMarkStreamAsRead(
         FakeApiConnection connection, {