diff --git a/motion/adapters/array_model_adapter.rb b/motion/adapters/array_model_adapter.rb
index c7213aa..6142795 100644
--- a/motion/adapters/array_model_adapter.rb
+++ b/motion/adapters/array_model_adapter.rb
@@ -68,7 +68,7 @@ def find_by_id(id)
 
       # Returns query result as an array
       def all
-        collection
+        collection.dup
       end
 
       def order(field_name = nil, &block)
diff --git a/spec/model_spec.rb b/spec/model_spec.rb
index 6b6f22e..4cef48b 100644
--- a/spec/model_spec.rb
+++ b/spec/model_spec.rb
@@ -300,3 +300,11 @@ class ProtectedTimestamps
     end
   end
 end
+
+describe "#all" do
+  it "should return a new collection" do
+    x = Task.all.object_id
+    Task.create
+    Task.all.object_id.should != x
+  end
+end