diff --git a/devops-service/spec/models/stack_template/stack_template_ec2_spec.rb b/devops-service/spec/models/stack_template/stack_template_ec2_spec.rb
index 1cb48af..eece64f 100644
--- a/devops-service/spec/models/stack_template/stack_template_ec2_spec.rb
+++ b/devops-service/spec/models/stack_template/stack_template_ec2_spec.rb
@@ -6,6 +6,7 @@ RSpec.describe Devops::Model::StackTemplateEc2, type: :model do
   before do
     allow(Provider::ProviderFactory).to receive(:providers).and_return(%w(ec2))
     allow_any_instance_of(Devops::Model::StackTemplateEc2).to receive_message_chain('provider_instance.validate_stack_template') { true }
+    allow_any_instance_of(Devops::Model::StackTemplateEc2).to receive_message_chain('provider_instance.store_file') { {'url' => nil} }
   end
 
   it_behaves_like 'stack template'