diff --git a/elasticsearch_dsl/document.py b/elasticsearch_dsl/document.py
index 1c2b7cdc7..fa6868954 100644
--- a/elasticsearch_dsl/document.py
+++ b/elasticsearch_dsl/document.py
@@ -37,8 +37,10 @@ def __new__(cls, name, bases, attrs):
         new_cls = super(IndexMeta, cls).__new__(cls, name, bases, attrs)
         if cls._document_initialized:
             index_opts = attrs.pop('Index', None)
-            new_cls._index = cls.construct_index(index_opts, bases)
-            new_cls._index.document(new_cls)
+            index = cls.construct_index(index_opts, bases)
+            new_cls._index = index
+            if index._name:
+                index.document(new_cls)
         cls._document_initialized = True
         return new_cls
 
@@ -48,8 +50,9 @@ def construct_index(cls, opts, bases):
             for b in bases:
                 if hasattr(b, '_index'):
                     return b._index
-            # create an all-matching index pattern
-            return Index('*')
+
+            # Set None as Index name so it will set _all while making the query
+            return Index(name=None)
 
         i = Index(
             getattr(opts, 'name', '*'),
diff --git a/elasticsearch_dsl/index.py b/elasticsearch_dsl/index.py
index bfb123582..4e47dd4d4 100644
--- a/elasticsearch_dsl/index.py
+++ b/elasticsearch_dsl/index.py
@@ -159,6 +159,13 @@ class Post(Document):
                 'Index object cannot have multiple types, %s already set, '
                 'trying to assign %s.' % (doc_type, name))
         self._doc_types.append(document)
+
+        # If the document index does not have any name, that means the user
+        # did not set any index already to the document.
+        # So set this index as document index
+        if document._index._name is None:
+            document._index = self
+
         return document
     doc_type = document
 
diff --git a/test_elasticsearch_dsl/test_document.py b/test_elasticsearch_dsl/test_document.py
index 515e24ea6..4aad5bb22 100644
--- a/test_elasticsearch_dsl/test_document.py
+++ b/test_elasticsearch_dsl/test_document.py
@@ -37,6 +37,9 @@ class Comment(document.InnerDoc):
 class DocWithNested(document.Document):
     comments = field.Nested(Comment)
 
+    class Index:
+        name = 'test-doc-with-nested'
+
 class SimpleCommit(document.Document):
     files = field.Text(multi=True)
 
@@ -59,15 +62,27 @@ def _deserialize(self, data):
 class SecretDoc(document.Document):
     title = SecretField(index='no')
 
+    class Index:
+        name = 'test-secret-doc'
+
 class NestedSecret(document.Document):
     secrets = field.Nested(SecretDoc)
 
+    class Index:
+        name = 'test-nested-secret'
+
 class OptionalObjectWithRequiredField(document.Document):
     comments = field.Nested(properties={'title': field.Keyword(required=True)})
 
+    class Index:
+        name = 'test-required'
+
 class Host(document.Document):
     ip = field.Ip()
 
+    class Index:
+        name = 'test-host'
+
 def test_range_serializes_properly():
     class D(document.Document):
         lr = field.LongRange()
@@ -103,6 +118,10 @@ class D(document.Document):
         kw = field.Keyword()
         class Meta:
             doc_type = 'not-doc'
+
+        class Index:
+            name = 'test-not-doc-index'
+
     assert D._index._get_doc_type() == 'not-doc'
     assert D._index.to_dict() == {
         'mappings': {'not-doc': {'properties': {'kw': {'type': 'keyword'}}}}
@@ -111,7 +130,8 @@ class Meta:
 def test_document_cannot_specify_different_doc_type_if_index_defined():
     # this will initiate ._index with doc_type = 'doc'
     class C(document.Document):
-        pass
+        class Index:
+            name = 'test-doc-type-c'
 
     with raises(IllegalOperation):
         class D(C):
@@ -416,7 +436,7 @@ def test_to_dict_is_recursive_and_can_cope_with_multi_values():
     } == md.to_dict()
 
 def test_to_dict_ignores_empty_collections():
-    md = MyDoc(name='', address={}, count=0, valid=False, tags=[])
+    md = MySubDoc(name='', address={}, count=0, valid=False, tags=[])
 
     assert {'name': '', 'count': 0, 'valid': False} == md.to_dict()
 
@@ -582,7 +602,8 @@ def test_from_es_respects_underscored_non_meta_fields():
     }
 
     class Company(document.Document):
-        pass
+        class Index:
+            name = 'test-company'
 
     c = Company.from_es(doc)
 
diff --git a/test_elasticsearch_dsl/test_integration/test_faceted_search.py b/test_elasticsearch_dsl/test_integration/test_faceted_search.py
index 3ada515e1..23bbdcd0a 100644
--- a/test_elasticsearch_dsl/test_integration/test_faceted_search.py
+++ b/test_elasticsearch_dsl/test_integration/test_faceted_search.py
@@ -21,10 +21,17 @@ class Repos(Document):
     is_public = Boolean()
     created_at = Date()
 
+    class Index:
+        name = 'git'
+
+
 class Commit(Document):
     files = Keyword()
     committed_date = Date()
 
+    class Index:
+        name = 'git'
+
 class RepoSearch(FacetedSearch):
     index = 'git'
     doc_types = [Repos]
diff --git a/test_elasticsearch_dsl/test_result.py b/test_elasticsearch_dsl/test_result.py
index e4faf8854..cd1394809 100644
--- a/test_elasticsearch_dsl/test_result.py
+++ b/test_elasticsearch_dsl/test_result.py
@@ -150,6 +150,10 @@ def test_bucket_response_can_be_iterated_over(agg_response):
 def test_bucket_keys_get_deserialized(aggs_data, aggs_search):
     class Commit(Document):
         info = Object(properties={'committed_date': Date()})
+
+        class Index:
+            name = 'test-commit'
+
     aggs_search = aggs_search.doc_type(Commit)
     agg_response = response.Response(aggs_search, aggs_data)