diff --git a/lib/chewy/index.rb b/lib/chewy/index.rb
index f5ff4348f..95cb8378d 100644
--- a/lib/chewy/index.rb
+++ b/lib/chewy/index.rb
@@ -30,18 +30,24 @@ class Index
     #
     def self.index_name(suggest = nil)
       if suggest
-        @index_name = build_index_name(suggest, prefix: Chewy.configuration[:prefix])
+        @index_name = build_index_name(suggest, prefix: default_prefix)
       else
         @index_name ||= begin
           build_index_name(
             name.sub(/Index\Z/, '').demodulize.underscore,
-            prefix: Chewy.configuration[:prefix]
+            prefix: default_prefix 
           ) if name
         end
       end
       @index_name or raise UndefinedIndex
     end
 
+    # Prefix to use 
+    #
+    def self.default_prefix
+      Chewy.configuration[:prefix]
+    end
+
     # Defines type for the index. Arguments depends on adapter used. For
     # ActiveRecord you can pass model or scope and options
     #
diff --git a/spec/chewy/index_spec.rb b/spec/chewy/index_spec.rb
index 10282ce79..a03453351 100644
--- a/spec/chewy/index_spec.rb
+++ b/spec/chewy/index_spec.rb
@@ -68,6 +68,11 @@
     end
   end
 
+  describe '.default_prefix' do
+    before { allow(Chewy).to receive_messages(configuration: {prefix: 'testing'}) }
+    specify { expect(Class.new(Chewy::Index).default_prefix).to eq('testing') }
+  end
+
   describe '.define_type' do
     specify { expect(DummiesIndex.type_hash['dummy']).to eq(DummiesIndex::Dummy) }