diff --git a/lib/di_container.dart b/lib/di_container.dart
index 27ac8c0..34238f8 100644
--- a/lib/di_container.dart
+++ b/lib/di_container.dart
@@ -70,6 +70,6 @@ class DiContainer {
      * @return - возвращает булево значение
      */
   bool hasInTree<T>() {
-    return has<T>() || (_parent != null && _parent.hasInTree());
+    return has<T>() || (_parent != null && _parent.hasInTree<T>());
   }
 }
diff --git a/test/di_container_test.dart b/test/di_container_test.dart
index 54f11a7..ddd7b62 100644
--- a/test/di_container_test.dart
+++ b/test/di_container_test.dart
@@ -50,6 +50,20 @@ void main() {
       expect(container.hasInTree<int>(), false);
     });
   });
+
+  group('With parent', () {
+    test(
+        "Container bind() throws state error (if it's parent already has a resolver)",
+        () {
+      final parentContainer = new DiContainer();
+      final container = new DiContainer(parentContainer);
+
+      parentContainer.bind<int>().toResolver(_makeResolver(5));
+
+      expect(() => container.bind<int>().toResolver(_makeResolver(3)),
+          throwsA(isA<StateError>()));
+    });
+  });
 }
 
 ResolverMock<T> _makeResolver<T>(T expectedValue) {