diff --git a/app/models/project.rb b/app/models/project.rb
index 32770bb..c6e9263 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -11,4 +11,10 @@ class Project < KalibroClient::Entities::Processor::Project
     @project_attributes ||= ProjectAttributes.find_by_project_id(self.id)
     @project_attributes.nil? ? ProjectAttributes.new : @project_attributes
   end
+
+  def destroy
+    self.attributes.destroy if self.attributes
+    @project_attributes = nil
+    super
+  end
 end
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index 677e4be..cc833ef 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -38,5 +38,32 @@ describe Project, :type => :model do
         expect(subject.attributes).to eq(project_attributes)
       end
     end
+
+    describe 'destroy' do
+      context 'when attributes exist' do
+        let!(:project) { FactoryGirl.build(:project) }
+        let!(:project_attributes) { FactoryGirl.build(:project_attributes, project_id: project.id) }
+
+        it 'should be destroyed' do
+          project.expects(:attributes).twice.returns(project_attributes)
+          project_attributes.expects(:destroy)
+          KalibroClient::Entities::Processor::Project.any_instance.expects(:destroy).returns(project)
+          project.destroy
+        end
+
+        it 'is expected to clean the attributes memoization' do
+          # Call attributes once so it memoizes
+          ProjectAttributes.expects(:find_by).with(project_id: project.id).returns(project_attributes)
+          expect(project.attributes).to eq(project_attributes)
+
+          # Destroying
+          project.destroy
+
+          # The expectation call will try to find the attributes on the database which should be nil since it was destroyed
+          ProjectAttributes.expects(:find_by).with(project_id: project.id).returns(nil)
+          expect(project.attributes).to_not eq(project_attributes)
+        end
+      end
+    end
   end
 end
--
libgit2 0.21.2