diff --git a/features/steps/dashboard/todos.rb b/features/steps/dashboard/todos.rb
index d3b6c7f6a15..bd8a270202e 100644
--- a/features/steps/dashboard/todos.rb
+++ b/features/steps/dashboard/todos.rb
@@ -20,7 +20,7 @@ class Spinach::Features::DashboardTodos < Spinach::FeatureSteps
   step 'I have todos' do
     create(:todo, user: current_user, project: project, author: mary_jane, target: issue, action: Todo::MENTIONED)
     create(:todo, user: current_user, project: project, author: john_doe, target: issue, action: Todo::ASSIGNED)
-    note = create(:note, author: john_doe, noteable: issue, note: "#{current_user.to_reference} Wdyt?")
+    note = create(:note, author: john_doe, noteable: issue, note: "#{current_user.to_reference} Wdyt?", project: project)
     create(:todo, user: current_user, project: project, author: john_doe, target: issue, action: Todo::MENTIONED, note: note)
     create(:todo, user: current_user, project: project, author: john_doe, target: merge_request, action: Todo::ASSIGNED)
   end
diff --git a/features/steps/project/issues/issues.rb b/features/steps/project/issues/issues.rb
index f2c68f007ef..5cd431e05d5 100644
--- a/features/steps/project/issues/issues.rb
+++ b/features/steps/project/issues/issues.rb
@@ -348,7 +348,7 @@ class Spinach::Features::ProjectIssues < Spinach::FeatureSteps
 
   step 'another user adds a comment with text "Yay!" to issue "Release 0.4"' do
     issue = Issue.find_by!(title: 'Release 0.4')
-    create(:note_on_issue, noteable: issue,  note: 'Yay!')
+    create(:note_on_issue, noteable: issue, project: project, note: 'Yay!')
   end
 
   step 'I should see a new comment with text "Yay!"' do
diff --git a/spec/factories/notes.rb b/spec/factories/notes.rb
index cabab0c2207..2940ac342a2 100644
--- a/spec/factories/notes.rb
+++ b/spec/factories/notes.rb
@@ -9,7 +9,7 @@ FactoryGirl.define do
     author
     noteable { create(:issue, project: project) }
 
-    factory :note_on_issue,              aliases: [:votable_note]
+    factory :note_on_issue,              traits: [:on_issue], aliases: [:votable_note]
     factory :note_on_commit,             traits: [:on_commit]
     factory :note_on_commit_diff,        traits: [:on_commit, :on_diff], class: LegacyDiffNote
     factory :note_on_merge_request,      traits: [:on_merge_request]
@@ -19,24 +19,33 @@ FactoryGirl.define do
     factory :downvote_note,              traits: [:award, :downvote]
     factory :upvote_note,                traits: [:award, :upvote]
 
+    trait :on_issue do
+      noteable_type 'Issue'
+    end
+
     trait :on_commit do
       noteable nil
       commit_id RepoHelpers.sample_commit.id
       noteable_type "Commit"
     end
 
-    trait :on_diff do
-      line_code "0_184_184"
-    end
-
     trait :on_merge_request do
-      noteable { create(:merge_request, project: project) }
+      noteable_type 'MergeRequest'
+      noteable do
+        create(:merge_request, source_project: project,
+                               target_project: project)
+      end
     end
 
     trait :on_project_snippet do
+      noteable_type 'Snippet'
       noteable { create(:snippet, project: project) }
     end
 
+    trait :on_diff do
+      line_code "0_184_184"
+    end
+
     trait :system do
       system true
     end
diff --git a/spec/features/issues/note_polling_spec.rb b/spec/features/issues/note_polling_spec.rb
index e4efdbe2421..9f521263e4c 100644
--- a/spec/features/issues/note_polling_spec.rb
+++ b/spec/features/issues/note_polling_spec.rb
@@ -9,8 +9,12 @@ feature 'Issue notes polling' do
   end
 
   scenario 'Another user adds a comment to an issue', js: true do
-    note = create(:note_on_issue, noteable: issue, note: 'Looks good!')
+    note = create(:note_on_issue, noteable: issue,
+                                  project: project,
+                                  note: 'Looks good!')
+
     page.execute_script('notes.refresh();')
+
     expect(page).to have_selector("#note_#{note.id}", text: 'Looks good!')
   end
 end
diff --git a/spec/features/issues_spec.rb b/spec/features/issues_spec.rb
index 749ee01890c..9271964166a 100644
--- a/spec/features/issues_spec.rb
+++ b/spec/features/issues_spec.rb
@@ -125,7 +125,7 @@ describe 'Issues', feature: true do
   describe 'Issue info' do
     it 'excludes award_emoji from comment count' do
       issue = create(:issue, author: @user, assignee: @user, project: project, title: 'foobar')
-      create(:upvote_note, noteable: issue)
+      create(:upvote_note, noteable: issue, project: project)
 
       visit namespace_project_issues_path(project.namespace, project, assignee_id: @user.id)
 
diff --git a/spec/features/notes_on_merge_requests_spec.rb b/spec/features/notes_on_merge_requests_spec.rb
index 9e9fec01943..2835cf44494 100644
--- a/spec/features/notes_on_merge_requests_spec.rb
+++ b/spec/features/notes_on_merge_requests_spec.rb
@@ -19,10 +19,14 @@ describe 'Comments', feature: true do
   end
 
   describe 'On a merge request', js: true, feature: true do
-    let!(:merge_request) { create(:merge_request) }
-    let!(:project) { merge_request.source_project }
+    let!(:project) { create(:project) }
+    let!(:merge_request) do
+      create(:merge_request, source_project: project, target_project: project)
+    end
+
     let!(:note) do
-      create(:note_on_merge_request, :with_attachment, project: project)
+      create(:note_on_merge_request, :with_attachment, noteable: merge_request,
+                                                       project: project)
     end
 
     before do
diff --git a/spec/features/participants_autocomplete_spec.rb b/spec/features/participants_autocomplete_spec.rb
index 1adab7e9c6c..c7c00a3266a 100644
--- a/spec/features/participants_autocomplete_spec.rb
+++ b/spec/features/participants_autocomplete_spec.rb
@@ -32,7 +32,8 @@ feature 'Member autocomplete', feature: true do
   context 'adding a new note on a Issue', js: true do
     before do
       issue = create(:issue, author: author, project: project)
-      create(:note, note: 'Ultralight Beam', noteable: issue, author: participant)
+      create(:note, note: 'Ultralight Beam', noteable: issue,
+                    project: project, author: participant)
       visit_issue(project, issue)
     end
 
@@ -47,7 +48,8 @@ feature 'Member autocomplete', feature: true do
   context 'adding a new note on a Merge Request ', js: true do
     before do
       merge = create(:merge_request, source_project: project, target_project: project, author: author)
-      create(:note, note: 'Ultralight Beam', noteable: merge, author: participant)
+      create(:note, note: 'Ultralight Beam', noteable: merge,
+                    project: project, author: participant)
       visit_merge_request(project, merge)
     end
 
diff --git a/spec/features/task_lists_spec.rb b/spec/features/task_lists_spec.rb
index b7368cca29d..6ed279ef9be 100644
--- a/spec/features/task_lists_spec.rb
+++ b/spec/features/task_lists_spec.rb
@@ -75,7 +75,10 @@ feature 'Task Lists', feature: true do
 
   describe 'for Notes' do
     let!(:issue) { create(:issue, author: user, project: project) }
-    let!(:note)  { create(:note, note: markdown, noteable: issue, author: user) }
+    let!(:note) do
+      create(:note, note: markdown, noteable: issue,
+                    project: project, author: user)
+    end
 
     it 'renders for note body' do
       visit_issue(project, issue)
diff --git a/spec/lib/gitlab/note_data_builder_spec.rb b/spec/lib/gitlab/note_data_builder_spec.rb
index f093d0a0d8b..82823e7f790 100644
--- a/spec/lib/gitlab/note_data_builder_spec.rb
+++ b/spec/lib/gitlab/note_data_builder_spec.rb
@@ -9,7 +9,8 @@ describe 'Gitlab::NoteDataBuilder', lib: true do
   before(:each) do
     expect(data).to have_key(:object_attributes)
     expect(data[:object_attributes]).to have_key(:url)
-    expect(data[:object_attributes][:url]).to eq(Gitlab::UrlBuilder.build(note))
+    expect(data[:object_attributes][:url])
+      .to eq(Gitlab::UrlBuilder.build(note))
     expect(data[:object_kind]).to eq('note')
     expect(data[:user]).to eq(user.hook_attrs)
   end
@@ -37,13 +38,21 @@ describe 'Gitlab::NoteDataBuilder', lib: true do
   end
 
   describe 'When asking for a note on issue' do
-    let(:issue) { create(:issue, created_at: fixed_time, updated_at: fixed_time) }
-    let(:note) { create(:note_on_issue, noteable_id: issue.id, project: project) }
+    let(:issue) do
+      create(:issue, created_at: fixed_time, updated_at: fixed_time,
+                     project: project)
+    end
+
+    let(:note) do
+      create(:note_on_issue, noteable_id: issue.id, project: project)
+    end
 
     it 'returns the note and issue-specific data' do
       expect(data).to have_key(:issue)
-      expect(data[:issue].except('updated_at')).to eq(issue.hook_attrs.except('updated_at'))
-      expect(data[:issue]['updated_at']).to be > issue.hook_attrs['updated_at']
+      expect(data[:issue].except('updated_at'))
+        .to eq(issue.hook_attrs.except('updated_at'))
+      expect(data[:issue]['updated_at'])
+        .to be > issue.hook_attrs['updated_at']
     end
 
     include_examples 'project hook data'
@@ -51,13 +60,23 @@ describe 'Gitlab::NoteDataBuilder', lib: true do
   end
 
   describe 'When asking for a note on merge request' do
-    let(:merge_request) { create(:merge_request, created_at: fixed_time, updated_at: fixed_time) }
-    let(:note) { create(:note_on_merge_request, noteable_id: merge_request.id, project: project) }
+    let(:merge_request) do
+      create(:merge_request, created_at: fixed_time,
+                             updated_at: fixed_time,
+                             source_project: project)
+    end
+
+    let(:note) do
+      create(:note_on_merge_request, noteable_id: merge_request.id,
+                                     project: project)
+    end
 
     it 'returns the note and merge request data' do
       expect(data).to have_key(:merge_request)
-      expect(data[:merge_request].except('updated_at')).to eq(merge_request.hook_attrs.except('updated_at'))
-      expect(data[:merge_request]['updated_at']).to be > merge_request.hook_attrs['updated_at']
+      expect(data[:merge_request].except('updated_at'))
+        .to eq(merge_request.hook_attrs.except('updated_at'))
+      expect(data[:merge_request]['updated_at'])
+        .to be > merge_request.hook_attrs['updated_at']
     end
 
     include_examples 'project hook data'
@@ -65,13 +84,22 @@ describe 'Gitlab::NoteDataBuilder', lib: true do
   end
 
   describe 'When asking for a note on merge request diff' do
-    let(:merge_request) { create(:merge_request, created_at: fixed_time, updated_at: fixed_time) }
-    let(:note) { create(:note_on_merge_request_diff, noteable_id: merge_request.id, project: project) }
+    let(:merge_request) do
+      create(:merge_request, created_at: fixed_time, updated_at: fixed_time,
+                             source_project: project)
+    end
+
+    let(:note) do
+      create(:note_on_merge_request_diff, noteable_id: merge_request.id,
+                                          project: project)
+    end
 
     it 'returns the note and merge request diff data' do
       expect(data).to have_key(:merge_request)
-      expect(data[:merge_request].except('updated_at')).to eq(merge_request.hook_attrs.except('updated_at'))
-      expect(data[:merge_request]['updated_at']).to be > merge_request.hook_attrs['updated_at']
+      expect(data[:merge_request].except('updated_at'))
+        .to eq(merge_request.hook_attrs.except('updated_at'))
+      expect(data[:merge_request]['updated_at'])
+        .to be > merge_request.hook_attrs['updated_at']
     end
 
     include_examples 'project hook data'
@@ -79,13 +107,22 @@ describe 'Gitlab::NoteDataBuilder', lib: true do
   end
 
   describe 'When asking for a note on project snippet' do
-    let!(:snippet) { create(:project_snippet, created_at: fixed_time, updated_at: fixed_time) }
-    let!(:note) { create(:note_on_project_snippet, noteable_id: snippet.id, project: project) }
+    let!(:snippet) do
+      create(:project_snippet, created_at: fixed_time, updated_at: fixed_time,
+                               project: project)
+    end
+
+    let!(:note) do
+      create(:note_on_project_snippet, noteable_id: snippet.id,
+                                       project: project)
+    end
 
     it 'returns the note and project snippet data' do
       expect(data).to have_key(:snippet)
-      expect(data[:snippet].except('updated_at')).to eq(snippet.hook_attrs.except('updated_at'))
-      expect(data[:snippet]['updated_at']).to be > snippet.hook_attrs['updated_at']
+      expect(data[:snippet].except('updated_at'))
+        .to eq(snippet.hook_attrs.except('updated_at'))
+      expect(data[:snippet]['updated_at'])
+        .to be > snippet.hook_attrs['updated_at']
     end
 
     include_examples 'project hook data'
diff --git a/spec/models/concerns/issuable_spec.rb b/spec/models/concerns/issuable_spec.rb
index 583827cdf42..331ebaf4ac4 100644
--- a/spec/models/concerns/issuable_spec.rb
+++ b/spec/models/concerns/issuable_spec.rb
@@ -189,7 +189,6 @@ describe Issue, "Issuable" do
     let(:data) { issue.to_hook_data(user) }
     let(:project) { issue.project }
 
-
     it "returns correct hook data" do
       expect(data[:object_kind]).to eq("issue")
       expect(data[:user]).to eq(user.hook_attrs)
@@ -230,10 +229,8 @@ describe Issue, "Issuable" do
 
   describe "votes" do
     before do
-      author = create :user
-      project = create :empty_project
-      issue.notes.awards.create!(note: "thumbsup", author: author, project: project)
-      issue.notes.awards.create!(note: "thumbsdown", author: author, project: project)
+      issue.notes.awards.create!(note: "thumbsup", author: user, project: issue.project)
+      issue.notes.awards.create!(note: "thumbsdown", author: user, project: issue.project)
     end
 
     it "returns correct values" do
diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index e269ff26a04..20e383e03b4 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -119,7 +119,9 @@ describe MergeRequest, models: true do
 
     before do
       allow(merge_request).to receive(:commits) { [merge_request.source_project.repository.commit] }
-      create(:note, commit_id: merge_request.commits.first.id, noteable_type: 'Commit', project: merge_request.project)
+      create(:note_on_commit, commit_id: merge_request.commits.first.id,
+                              noteable_type: 'Commit',
+                              project: merge_request.project)
       create(:note, noteable: merge_request, project: merge_request.project)
     end
 
@@ -129,7 +131,10 @@ describe MergeRequest, models: true do
     end
 
     it "should include notes for commits from target project as well" do
-      create(:note, commit_id: merge_request.commits.first.id, noteable_type: 'Commit', project: merge_request.target_project)
+      create(:note_on_commit, commit_id: merge_request.commits.first.id,
+                              noteable_type: 'Commit',
+                              project: merge_request.target_project)
+
       expect(merge_request.commits).not_to be_empty
       expect(merge_request.mr_and_commit_notes.count).to eq(3)
     end
diff --git a/spec/models/note_spec.rb b/spec/models/note_spec.rb
index d90b54464cd..20d40c47aa6 100644
--- a/spec/models/note_spec.rb
+++ b/spec/models/note_spec.rb
@@ -202,12 +202,18 @@ describe Note, models: true do
     let(:merge_request) { create :merge_request }
 
     it "converts aliases to actual name" do
-      note = create(:note, note: ":+1:", noteable: merge_request)
+      note = create(:note, note: ":+1:",
+                           noteable: merge_request,
+                           project: merge_request.project)
+
       expect(note.reload.note).to eq("thumbsup")
     end
 
     it "is not an award emoji when comment is on a diff" do
-      note = create(:note_on_merge_request_diff, note: ":blowfish:", noteable: merge_request, line_code: "11d5d2e667e9da4f7f610f81d86c974b146b13bd_0_2")
+      note = create(:note_on_merge_request_diff, note: ":blowfish:",
+                                                 noteable: merge_request,
+                                                 project: merge_request.project,
+                                                 line_code: "11d5d2e667e9da4f7f610f81d86c974b146b13bd_0_2")
       note = note.reload
 
       expect(note.note).to eq(":blowfish:")
diff --git a/spec/models/project_services/hipchat_service_spec.rb b/spec/models/project_services/hipchat_service_spec.rb
index f887ed4bafc..7013ffbf3e1 100644
--- a/spec/models/project_services/hipchat_service_spec.rb
+++ b/spec/models/project_services/hipchat_service_spec.rb
@@ -176,86 +176,117 @@ describe HipchatService, models: true do
     context "Note events" do
       let(:user) { create(:user) }
       let(:project) { create(:project, creator_id: user.id) }
-      let(:issue)         { create(:issue, project: project) }
-      let(:merge_request) { create(:merge_request, source_project: project, target_project: project) }
-      let(:snippet)       { create(:project_snippet, project: project) }
-      let(:commit_note) { create(:note_on_commit, author: user, project: project, commit_id: project.repository.commit.id, note: 'a comment on a commit') }
-      let(:merge_request_note) { create(:note_on_merge_request, noteable_id: merge_request.id, note: "merge request note") }
-      let(:issue_note) { create(:note_on_issue, noteable_id: issue.id, note: "issue note")}
-      let(:snippet_note) { create(:note_on_project_snippet, noteable_id: snippet.id, note: "snippet note") }
 
-      it "should call Hipchat API for commit comment events" do
-        data = Gitlab::NoteDataBuilder.build(commit_note, user)
-        hipchat.execute(data)
+      context 'when commit comment event triggered' do
+        let(:commit_note) do
+          create(:note_on_commit, author: user, project: project,
+                                  commit_id: project.repository.commit.id,
+                                  note: 'a comment on a commit')
+        end
 
-        expect(WebMock).to have_requested(:post, api_url).once
+        it "should call Hipchat API for commit comment events" do
+          data = Gitlab::NoteDataBuilder.build(commit_note, user)
+          hipchat.execute(data)
 
-        message = hipchat.send(:create_message, data)
+          expect(WebMock).to have_requested(:post, api_url).once
 
-        obj_attr = data[:object_attributes]
-        commit_id = Commit.truncate_sha(data[:commit][:id])
-        title = hipchat.send(:format_title, data[:commit][:message])
+          message = hipchat.send(:create_message, data)
 
-        expect(message).to eq("#{user.name} commented on " \
-            "<a href=\"#{obj_attr[:url]}\">commit #{commit_id}</a> in " \
-            "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
-            "#{title}" \
-            "<pre>a comment on a commit</pre>")
+          obj_attr = data[:object_attributes]
+          commit_id = Commit.truncate_sha(data[:commit][:id])
+          title = hipchat.send(:format_title, data[:commit][:message])
+
+          expect(message).to eq("#{user.name} commented on " \
+              "<a href=\"#{obj_attr[:url]}\">commit #{commit_id}</a> in " \
+              "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
+              "#{title}" \
+              "<pre>a comment on a commit</pre>")
+        end
       end
 
-      it "should call Hipchat API for merge request comment events" do
-        data = Gitlab::NoteDataBuilder.build(merge_request_note, user)
-        hipchat.execute(data)
+      context 'when merge request comment event triggered' do
+        let(:merge_request) do
+          create(:merge_request, source_project: project,
+                                 target_project: project)
+        end
 
-        expect(WebMock).to have_requested(:post, api_url).once
+        let(:merge_request_note) do
+          create(:note_on_merge_request, noteable_id: merge_request.id,
+                                         project: project,
+                                         note: "merge request note")
+        end
 
-        message = hipchat.send(:create_message, data)
+        it "should call Hipchat API for merge request comment events" do
+          data = Gitlab::NoteDataBuilder.build(merge_request_note, user)
+          hipchat.execute(data)
 
-        obj_attr = data[:object_attributes]
-        merge_id = data[:merge_request]['iid']
-        title = data[:merge_request]['title']
+          expect(WebMock).to have_requested(:post, api_url).once
 
-        expect(message).to eq("#{user.name} commented on " \
-            "<a href=\"#{obj_attr[:url]}\">merge request !#{merge_id}</a> in " \
-            "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
-            "<b>#{title}</b>" \
-            "<pre>merge request note</pre>")
+          message = hipchat.send(:create_message, data)
+
+          obj_attr = data[:object_attributes]
+          merge_id = data[:merge_request]['iid']
+          title = data[:merge_request]['title']
+
+          expect(message).to eq("#{user.name} commented on " \
+              "<a href=\"#{obj_attr[:url]}\">merge request !#{merge_id}</a> in " \
+              "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
+              "<b>#{title}</b>" \
+              "<pre>merge request note</pre>")
+        end
       end
 
-      it "should call Hipchat API for issue comment events" do
-        data = Gitlab::NoteDataBuilder.build(issue_note, user)
-        hipchat.execute(data)
+      context 'when issue comment event triggered' do
+        let(:issue) { create(:issue, project: project) }
+        let(:issue_note) do
+          create(:note_on_issue, noteable_id: issue.id, project: project,
+                                 note: "issue note")
+        end
 
-        message = hipchat.send(:create_message, data)
+        it "should call Hipchat API for issue comment events" do
+          data = Gitlab::NoteDataBuilder.build(issue_note, user)
+          hipchat.execute(data)
 
-        obj_attr = data[:object_attributes]
-        issue_id = data[:issue]['iid']
-        title = data[:issue]['title']
+          message = hipchat.send(:create_message, data)
 
-        expect(message).to eq("#{user.name} commented on " \
-            "<a href=\"#{obj_attr[:url]}\">issue ##{issue_id}</a> in " \
-            "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
-            "<b>#{title}</b>" \
-            "<pre>issue note</pre>")
+          obj_attr = data[:object_attributes]
+          issue_id = data[:issue]['iid']
+          title = data[:issue]['title']
+
+          expect(message).to eq("#{user.name} commented on " \
+              "<a href=\"#{obj_attr[:url]}\">issue ##{issue_id}</a> in " \
+              "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
+              "<b>#{title}</b>" \
+              "<pre>issue note</pre>")
+        end
       end
 
-      it "should call Hipchat API for snippet comment events" do
-        data = Gitlab::NoteDataBuilder.build(snippet_note, user)
-        hipchat.execute(data)
+      context 'when snippet comment event triggered' do
+        let(:snippet) { create(:project_snippet, project: project) }
+        let(:snippet_note) do
+          create(:note_on_project_snippet, noteable_id: snippet.id,
+                                           project: project,
+                                           note: "snippet note")
+        end
 
-        expect(WebMock).to have_requested(:post, api_url).once
+        it "should call Hipchat API for snippet comment events" do
+          data = Gitlab::NoteDataBuilder.build(snippet_note, user)
+          hipchat.execute(data)
 
-        message = hipchat.send(:create_message, data)
+          expect(WebMock).to have_requested(:post, api_url).once
 
-        obj_attr = data[:object_attributes]
-        snippet_id = data[:snippet]['id']
-        title = data[:snippet]['title']
+          message = hipchat.send(:create_message, data)
 
-        expect(message).to eq("#{user.name} commented on " \
-            "<a href=\"#{obj_attr[:url]}\">snippet ##{snippet_id}</a> in " \
-            "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
-            "<b>#{title}</b>" \
-            "<pre>snippet note</pre>")
+          obj_attr = data[:object_attributes]
+          snippet_id = data[:snippet]['id']
+          title = data[:snippet]['title']
+
+          expect(message).to eq("#{user.name} commented on " \
+              "<a href=\"#{obj_attr[:url]}\">snippet ##{snippet_id}</a> in " \
+              "<a href=\"#{project.web_url}\">#{project_name}</a>: " \
+              "<b>#{title}</b>" \
+              "<pre>snippet note</pre>")
+        end
       end
     end
 
diff --git a/spec/models/project_services/slack_service_spec.rb b/spec/models/project_services/slack_service_spec.rb
index a97b7560137..155f3e74e0d 100644
--- a/spec/models/project_services/slack_service_spec.rb
+++ b/spec/models/project_services/slack_service_spec.rb
@@ -142,13 +142,6 @@ describe SlackService, models: true do
     let(:slack)   { SlackService.new }
     let(:user) { create(:user) }
     let(:project) { create(:project, creator_id: user.id) }
-    let(:issue)         { create(:issue, project: project) }
-    let(:merge_request) { create(:merge_request, source_project: project, target_project: project) }
-    let(:snippet)       { create(:project_snippet, project: project) }
-    let(:commit_note) { create(:note_on_commit, author: user, project: project, commit_id: project.repository.commit.id, note: 'a comment on a commit') }
-    let(:merge_request_note) { create(:note_on_merge_request, noteable_id: merge_request.id, note: "merge request note") }
-    let(:issue_note) { create(:note_on_issue, noteable_id: issue.id, note: "issue note")}
-    let(:snippet_note) { create(:note_on_project_snippet, noteable_id: snippet.id, note: "snippet note") }
     let(:webhook_url) { 'https://hooks.slack.com/services/SVRWFV0VVAR97N/B02R25XN3/ZBqu7xMupaEEICInN685' }
 
     before do
@@ -162,32 +155,61 @@ describe SlackService, models: true do
       WebMock.stub_request(:post, webhook_url)
     end
 
-    it "should call Slack API for commit comment events" do
-      data = Gitlab::NoteDataBuilder.build(commit_note, user)
-      slack.execute(data)
+    context 'when commit comment event executed' do
+      let(:commit_note) do
+        create(:note_on_commit, author: user,
+                                project: project,
+                                commit_id: project.repository.commit.id,
+                                note: 'a comment on a commit')
+      end
 
-      expect(WebMock).to have_requested(:post, webhook_url).once
+      it "should call Slack API for commit comment events" do
+        data = Gitlab::NoteDataBuilder.build(commit_note, user)
+        slack.execute(data)
+
+        expect(WebMock).to have_requested(:post, webhook_url).once
+      end
     end
 
-    it "should call Slack API for merge request comment events" do
-      data = Gitlab::NoteDataBuilder.build(merge_request_note, user)
-      slack.execute(data)
+    context 'when merge request comment event executed' do
+      let(:merge_request_note) do
+        create(:note_on_merge_request, project: project,
+                                       note: "merge request note")
+      end
 
-      expect(WebMock).to have_requested(:post, webhook_url).once
+      it "should call Slack API for merge request comment events" do
+        data = Gitlab::NoteDataBuilder.build(merge_request_note, user)
+        slack.execute(data)
+
+        expect(WebMock).to have_requested(:post, webhook_url).once
+      end
     end
 
-    it "should call Slack API for issue comment events" do
-      data = Gitlab::NoteDataBuilder.build(issue_note, user)
-      slack.execute(data)
+    context 'when issue comment event executed' do
+      let(:issue_note) do
+        create(:note_on_issue, project: project, note: "issue note")
+      end
 
-      expect(WebMock).to have_requested(:post, webhook_url).once
+      it "should call Slack API for issue comment events" do
+        data = Gitlab::NoteDataBuilder.build(issue_note, user)
+        slack.execute(data)
+
+        expect(WebMock).to have_requested(:post, webhook_url).once
+      end
     end
 
-    it "should call Slack API for snippet comment events" do
-      data = Gitlab::NoteDataBuilder.build(snippet_note, user)
-      slack.execute(data)
+    context 'when snippet comment event executed' do
+      let(:snippet_note) do
+        create(:note_on_project_snippet, project: project,
+                                         note: "snippet note")
+      end
 
-      expect(WebMock).to have_requested(:post, webhook_url).once
+      it "should call Slack API for snippet comment events" do
+        data = Gitlab::NoteDataBuilder.build(snippet_note, user)
+        slack.execute(data)
+
+        expect(WebMock).to have_requested(:post, webhook_url).once
+      end
     end
   end
 end
diff --git a/spec/services/merge_requests/merge_when_build_succeeds_service_spec.rb b/spec/services/merge_requests/merge_when_build_succeeds_service_spec.rb
index 82247849814..0861d74aede 100644
--- a/spec/services/merge_requests/merge_when_build_succeeds_service_spec.rb
+++ b/spec/services/merge_requests/merge_when_build_succeeds_service_spec.rb
@@ -1,8 +1,8 @@
 require 'spec_helper'
 
 describe MergeRequests::MergeWhenBuildSucceedsService do
-  let(:user)          { create(:user) }
-  let(:merge_request) { create(:merge_request) }
+  let(:user) { create(:user) }
+  let(:project) { create(:project) }
 
   let(:mr_merge_if_green_enabled) do
     create(:merge_request, merge_when_build_succeeds: true, merge_user: user,
@@ -10,11 +10,15 @@ describe MergeRequests::MergeWhenBuildSucceedsService do
                            source_project: project, target_project: project, state: "opened")
   end
 
-  let(:project) { create(:project) }
   let(:ci_commit) { create(:ci_commit_with_one_job, ref: mr_merge_if_green_enabled.source_branch, project: project) }
   let(:service) { MergeRequests::MergeWhenBuildSucceedsService.new(project, user, commit_message: 'Awesome message') }
 
   describe "#execute" do
+    let(:merge_request) do
+      create(:merge_request, target_project: project, source_project: project,
+                             source_branch: "feature", target_branch: 'master')
+    end
+
     context 'first time enabling' do
       before do
         allow(merge_request).to receive(:ci_commit).and_return(ci_commit)
diff --git a/spec/services/system_note_service_spec.rb b/spec/services/system_note_service_spec.rb
index ee976eb2926..29e0a63d8ce 100644
--- a/spec/services/system_note_service_spec.rb
+++ b/spec/services/system_note_service_spec.rb
@@ -208,8 +208,10 @@ describe SystemNoteService, services: true do
   end
 
   describe '.merge_when_build_succeeds' do
-    let(:ci_commit) { build :ci_commit_without_jobs }
-    let(:noteable) { create :merge_request }
+    let(:ci_commit) { build(:ci_commit_without_jobs )}
+    let(:noteable) do
+      create(:merge_request, source_project: project, target_project: project)
+    end
 
     subject { described_class.merge_when_build_succeeds(noteable, project, author, noteable.last_commit) }
 
@@ -221,8 +223,10 @@ describe SystemNoteService, services: true do
   end
 
   describe '.cancel_merge_when_build_succeeds' do
-    let(:ci_commit) { build :ci_commit_without_jobs }
-    let(:noteable) { create :merge_request }
+    let(:ci_commit) { build(:ci_commit_without_jobs) }
+    let(:noteable) do
+      create(:merge_request, source_project: project, target_project: project)
+    end
 
     subject { described_class.cancel_merge_when_build_succeeds(noteable, project, author) }