diff --git a/spec/controllers/assets_controller_spec.rb b/spec/controllers/assets_controller_spec.rb
index 11fef9a54..453d56a37 100644
--- a/spec/controllers/assets_controller_spec.rb
+++ b/spec/controllers/assets_controller_spec.rb
@@ -5,26 +5,13 @@ require 'rails_helper'
 describe AssetsController, type: :controller do
   login_user
 
-  let(:user) { subject.current_user }
-  let!(:team) { create :team, created_by: user }
-  let(:user_team) { create :user_team, :admin, user: user, team: team }
-  let!(:user_project) { create :user_project, user: user }
-  let(:project) do
-    create :project, team: team, user_projects: [user_project]
-  end
-  let(:owner_role) { create :owner_role }
-  let(:experiment) { create :experiment, project: project }
-  let(:my_module) { create :my_module, name: 'test task', experiment: experiment }
-  let(:protocol) do
-    create :protocol, my_module: my_module, team: team, added_by: user
-  end
-  let(:step) { create :step, protocol: protocol, user: user }
-  let(:step_asset_task) { create :step_asset, step: step }
-
-  let(:result) do
-    create :result, name: 'test result', my_module: my_module, user: user
-  end
-  let(:result_asset) { create :result_asset, result: result }
+  include_context 'reference_project_structure', {
+    role: :owner_role,
+    result_asset: true,
+    step: true,
+    step_asset: true,
+    result_comment: true
+  }
 
   let(:protocol_in_repository) { create :protocol, :in_public_repository, team: team }
   let(:step_in_repository) { create :step, protocol: protocol_in_repository, user: user }
@@ -36,7 +23,6 @@ describe AssetsController, type: :controller do
 
   describe 'POST start_edit' do
     before do
-      create_user_assignment(my_module, owner_role, user)
       allow(controller).to receive(:check_edit_permission).and_return(true)
     end
     let(:action) { post :create_start_edit_image_activity, params: params, format: :json }
@@ -44,11 +30,10 @@ describe AssetsController, type: :controller do
       { id: nil }
     end
     it 'calls create activity service (start edit image on step)' do
-      params[:id] = step_asset_task.asset.id
+      params[:id] = step_asset.asset.id
       expect(Activities::CreateActivityService).to receive(:call)
         .with(hash_including(activity_type: :edit_image_on_step))
       action
-      p response.code
     end
 
     it 'calls create activity service (start edit image on result)' do
@@ -67,7 +52,7 @@ describe AssetsController, type: :controller do
     end
 
     it 'adds activity in DB' do
-      params[:id] = step_asset_task.asset.id
+      params[:id] = step_asset.asset.id
       expect { action }
         .to(change { Activity.count })
     end
diff --git a/spec/controllers/canvas_controller_spec.rb b/spec/controllers/canvas_controller_spec.rb
index cb57e6273..57881e9b0 100644
--- a/spec/controllers/canvas_controller_spec.rb
+++ b/spec/controllers/canvas_controller_spec.rb
@@ -4,19 +4,10 @@ require 'rails_helper'
 
 describe CanvasController do
   login_user
+  include_context 'reference_project_structure', {
+    skip_my_module: true
+  }
 
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let!(:user_team) { create :user_team, :admin, user: user, team: team }
-  let!(:user_project) do
-    create :user_project, user: user, project: project
-  end
-  let(:project) do
-    create :project, team: team
-  end
-  let(:owner_role) { create :owner_role }
-
-  let(:experiment) { create :experiment, project: project }
   let(:experiment2) { create :experiment, project: project }
 
   # Idea of this "end to end" test is to put a lot "work" on method `@experiment.udpate_canvas` and controller actipn
@@ -94,9 +85,9 @@ describe CanvasController do
 
     before do
       8.times do |i|
-        create_user_assignment(public_send("task#{i+1}"), owner_role, user)
+        create_user_assignment(public_send("task#{i+1}"), role, user)
       end
-      create_user_assignment(experiment2, owner_role, user)
+      create_user_assignment(experiment2, role, user)
     end
 
     context 'when have a lot changes on canvas' do
diff --git a/spec/controllers/experiments_controller_spec.rb b/spec/controllers/experiments_controller_spec.rb
index f07198da2..cadd73cf0 100644
--- a/spec/controllers/experiments_controller_spec.rb
+++ b/spec/controllers/experiments_controller_spec.rb
@@ -4,16 +4,8 @@ require 'rails_helper'
 
 describe ExperimentsController, type: :controller do
   login_user
+  include_context 'reference_project_structure'
 
-  let!(:user) { controller.current_user }
-  let!(:team) { create :team, created_by: user, users: [user] }
-  let!(:project) { create :project, team: team }
-  let(:owner_role) { create :owner_role }
-  let(:experiment) { create :experiment, project: project }
-
-  before do
-    create_user_assignment(experiment, owner_role, user)
-  end
 
   describe 'POST create' do
     let(:action) { post :create, params: params, format: :json }
@@ -78,7 +70,7 @@ describe ExperimentsController, type: :controller do
       end
 
       before do
-        create_user_assignment(archived_experiment, owner_role, user)
+        create_user_assignment(archived_experiment, role, user)
       end
 
       it 'calls create activity for unarchiving experiment' do
diff --git a/spec/controllers/my_module_comments_controller_spec.rb b/spec/controllers/my_module_comments_controller_spec.rb
index 33153c1ed..ab0f3a038 100644
--- a/spec/controllers/my_module_comments_controller_spec.rb
+++ b/spec/controllers/my_module_comments_controller_spec.rb
@@ -4,20 +4,10 @@ require 'rails_helper'
 
 describe MyModuleCommentsController, type: :controller do
   login_user
-
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let!(:user_team) { create :user_team, :admin, user: user, team: team }
-  let(:project) { create :project, team: team, created_by: user }
-  let(:normal_user_role) { create :normal_user_role }
-
-  let(:experiment) { create :experiment, project: project }
-  let(:my_module) { create :my_module, experiment: experiment }
-  let(:task_comment) { create :task_comment, user: user, my_module: my_module }
-
-  before do
-    create_user_assignment(my_module, normal_user_role, user)
-  end
+  include_context 'reference_project_structure' , {
+    role: :normal_user_role,
+    my_module_comment: true
+  }
 
   describe 'POST create' do
     let(:action) { post :create, params: params, format: :json }
@@ -42,7 +32,7 @@ describe MyModuleCommentsController, type: :controller do
     let(:action) { put :update, params: params, format: :json }
     let(:params) do
       { my_module_id: my_module.id,
-        id: task_comment.id,
+        id: my_module_comment.id,
         comment: { message: 'comment updated' } }
     end
 
@@ -62,7 +52,7 @@ describe MyModuleCommentsController, type: :controller do
   describe 'DELETE destroy' do
     let(:action) { delete :destroy, params: params, format: :json }
     let(:params) do
-      { my_module_id: my_module.id, id: task_comment.id }
+      { my_module_id: my_module.id, id: my_module_comment.id }
     end
 
     it 'calls create activity for deleting comment on task' do
diff --git a/spec/controllers/my_module_repositories_controller_spec.rb b/spec/controllers/my_module_repositories_controller_spec.rb
index 1a9b47ae0..77ca0b71b 100644
--- a/spec/controllers/my_module_repositories_controller_spec.rb
+++ b/spec/controllers/my_module_repositories_controller_spec.rb
@@ -4,16 +4,9 @@ require 'rails_helper'
 
 describe MyModuleRepositoriesController, type: :controller do
   login_user
-
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let!(:user_team) { create :user_team, :admin, user: user, team: team }
-  let(:project) { create :project, team: team, created_by: user }
-  let!(:user_project) do
-    create :user_project, user: user, project: project
-  end
-  let(:normal_user_role) { create :normal_user_role }
-
+  include_context 'reference_project_structure' , {
+    role: :normal_user_role
+  }
   let!(:repository) { create :repository, created_by: user, team: team }
   let!(:repository_row) do
     create :repository_row, created_by: user, repository: repository
@@ -21,12 +14,6 @@ describe MyModuleRepositoriesController, type: :controller do
   let!(:repository_row_2) do
     create :repository_row, created_by: user, repository: repository
   end
-  let(:experiment) { create :experiment, project: project }
-  let(:my_module) { create :my_module, experiment: experiment }
-
-  before do
-    create_user_assignment(my_module, normal_user_role, user)
-  end
 
   describe 'PUT update (assign repository records)' do
     let(:params) do
diff --git a/spec/controllers/my_module_tags_controller_spec.rb b/spec/controllers/my_module_tags_controller_spec.rb
index 63427bf74..3a2d5c1b6 100644
--- a/spec/controllers/my_module_tags_controller_spec.rb
+++ b/spec/controllers/my_module_tags_controller_spec.rb
@@ -4,21 +4,11 @@ require 'rails_helper'
 
 describe MyModuleTagsController, type: :controller do
   login_user
-
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let!(:user_team) { create :user_team, :admin, user: user, team: team }
-  let(:project) { create :project, created_by: user }
-
-  let(:experiment) { create :experiment, project: project }
-  let(:my_module) { create :my_module, experiment: experiment }
-
-  before do
-    create_user_assignment(my_module, create(:owner_role), user)
-  end
+  include_context 'reference_project_structure', {
+    tag: true
+  }
 
   describe 'POST create' do
-    let(:tag) { create :tag, project: project }
     let(:action) { post :create, params: params, format: :json }
     let(:params) do
       { my_module_id: my_module.id, my_module_tag: { tag_id: tag.id } }
diff --git a/spec/controllers/my_modules_controller_spec.rb b/spec/controllers/my_modules_controller_spec.rb
index 93f711393..6dcf8ba3d 100644
--- a/spec/controllers/my_modules_controller_spec.rb
+++ b/spec/controllers/my_modules_controller_spec.rb
@@ -4,23 +4,12 @@ require 'rails_helper'
 
 describe MyModulesController, type: :controller do
   login_user
-
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let!(:user_team) { create :user_team, :admin, user: user, team: team }
-  let(:project) { create :project, team: team, created_by: user }
-  let(:owner_role) { create :owner_role }
+  include_context 'reference_project_structure'
 
   let!(:repository) { create :repository, created_by: user, team: team }
   let!(:repository_row) do
     create :repository_row, created_by: user, repository: repository
   end
-  let(:experiment) { create :experiment, project: project }
-  let(:my_module) { create :my_module, experiment: experiment }
-
-  before do
-    create_user_assignment(my_module, owner_role, user)
-  end
 
   describe 'PUT update' do
     let(:action) { put :update, params: params, format: :json }
@@ -192,7 +181,7 @@ describe MyModulesController, type: :controller do
 
     before do
       3.times do |i|
-        create_user_assignment(public_send("task#{i+1}"), owner_role, user)
+        create_user_assignment(public_send("task#{i+1}"), role, user)
       end
     end
 
diff --git a/spec/controllers/project_comments_controller_spec.rb b/spec/controllers/project_comments_controller_spec.rb
index 47d002649..ef074bac0 100644
--- a/spec/controllers/project_comments_controller_spec.rb
+++ b/spec/controllers/project_comments_controller_spec.rb
@@ -4,23 +4,9 @@ require 'rails_helper'
 
 describe ProjectCommentsController, type: :controller do
   login_user
-
-  let(:user) { subject.current_user }
-  let(:team) { create :team, created_by: user }
-  let(:user_team) { create :user_team, team: team, user: user }
-  let(:project) do
-    create :project, team: team
-  end
-  let(:owner_role) { create :owner_role }
-  let(:project_comment) do
-    create :project_comment, project: project, user: user
-  end
-
-  before do
-    create_user_assignment(project, owner_role, user)
-  end
-
-
+  include_context 'reference_project_structure', {
+    project_comment: true
+  }
   describe 'POST create' do
     context 'in JSON format' do
       let(:action) { post :create, params: params, format: :json }
diff --git a/spec/support/permission_helpers.rb b/spec/support/permission_helpers.rb
index 3b42070c4..2aec98489 100644
--- a/spec/support/permission_helpers.rb
+++ b/spec/support/permission_helpers.rb
@@ -1,10 +1,13 @@
 module PermissionHelpers
   def create_user_assignment(object, role, user, assigned_by = nil)
-    create :user_assignment,
-           assignable: object,
-           user: user,
-           user_role: role,
-           assigned_by: assigned_by || user
+
+    unless UserAssignment.where(assignable: object, user: user, user_role: role).any?
+      create :user_assignment,
+             assignable: object,
+             user: user,
+             user_role: role,
+             assigned_by: assigned_by || user
+    end
 
     case object
     when MyModule
diff --git a/spec/support/reference_project_structure_context.rb b/spec/support/reference_project_structure_context.rb
new file mode 100644
index 000000000..c575945ef
--- /dev/null
+++ b/spec/support/reference_project_structure_context.rb
@@ -0,0 +1,75 @@
+#  Example
+#
+#  include_context 'reference_project_structure', {
+#    role: :owner_role,
+#    result_asset: true,
+#    step: true,
+#    team: @team,
+#    step_asset: true,
+#    result_comment: true,
+#    project_comments: 4,
+#    tags: 2,
+#    skip_assignments: true
+#  }
+
+RSpec.shared_context 'reference_project_structure' do |config|
+
+  config ||= {}
+  let(:user) { subject.current_user }
+  let(:role) { create (config[:role] || :owner_role) } unless config[:skip_role]
+  let!(:team) { config[:team] || (create :team, created_by: user) }
+  let!(:user_team) { create :user_team, :admin, user: user, team: team }
+  let(:project) { create :project, team: team }
+  let(:experiment) { create :experiment, project: project }
+  let(:my_module) { create :my_module, experiment: experiment } unless config[:skip_my_module]
+
+  let(:tag) { create :tag, project: project} if config[:tag]
+  let(:tags) { create_list :tag, config[:tags], project: project} if config[:tags]
+
+  let(:project_comment) { create :project_comment, project: project, user: user } if config[:project_comment]
+  let(:project_comments) { create_list :project_comment, config[:project_comments], project: project, user: user } if config[:project_comments]
+
+  let(:my_module_comment) { create :task_comment, my_module: my_module, user: user } if config[:my_module_comment]
+  let(:my_module_comments) { create_list :task_comment, config[:my_module_comments], my_module: my_module, user: user } if config[:my_module_comments]
+
+  if config[:step]
+    let(:step) { create :step, protocol: my_module.protocol, user: user}
+    let(:step_comment) { create :step_comment, step: step, user: user} if config[:step_comment]
+    let(:step_comments) { create_list :step_comment, config[:step_comments], step: step, user: user} if config[:step_comments]
+
+    [:step_asset, :step_table, :step_checklist].each do |step_component|
+      let(step_component) { create step_component, step: step } if config[step_component]
+    end
+    [:step_assets, :step_tables, :step_checklists].each do |step_components|
+      let(step_components) { create_list step_components, config[step_components], step: step } if config[step_components]
+    end
+  end
+
+  if config[:steps]
+    let(:steps) { create_list :step, config[:steps], protocol: my_module.protocol, user: user}
+  end
+
+  [:result_asset, :result_text, :result_table].each do |result|
+    if config[result]
+      let(result) { create result, result: (create :result, my_module: my_module, user: user )}
+      let("#{result}_comment") { create :result_comment, result: public_send(result).result, user: user } if config[:result_comment]
+      let("#{result}_comments") { create_list :result_comment, config[:result_comments], result: public_send(result).result, user: user } if config[:result_comments]
+    end
+  end
+
+  [:result_assets, :result_texts, :result_tables].each do |result|
+    if config[result]
+      let(result) { create_list result, config[result], result: (create :result, my_module: my_module, user: user )}
+    end
+  end
+
+  before do
+    unless config[:skip_assignments]
+      if config[:skip_my_module]
+        create_user_assignment(experiment, role, user)
+      else
+        create_user_assignment(my_module, role, user)
+      end
+    end
+  end
+end