diff --git a/Gemfile b/Gemfile
index 60638ebb4..ef32fe193 100644
--- a/Gemfile
+++ b/Gemfile
@@ -74,6 +74,8 @@ gem 'hashie'
 
 gem 'mailjet'
 
+gem "premailer-rails"
+
 gem 'smart_listing'
 
 gem 'bootstrap-wysihtml5-rails', '~> 0.3.3.8'
@@ -163,5 +165,3 @@ group :development, :test do
   gem 'dotenv-rails'
   gem 'rspec_junit_formatter'
 end
-
-gem "premailer-rails"
diff --git a/spec/features/new_gestionnaire/gestionnaire_spec.rb b/spec/features/new_gestionnaire/gestionnaire_spec.rb
index 5c7617d17..34654a7e1 100644
--- a/spec/features/new_gestionnaire/gestionnaire_spec.rb
+++ b/spec/features/new_gestionnaire/gestionnaire_spec.rb
@@ -159,7 +159,7 @@ feature 'The gestionnaire part' do
   def test_mail(to, content)
     mail = ActionMailer::Base.deliveries.first
     expect(mail.to).to match([to])
-    expect(mail.body.raw_source).to include(content)
+    expect(mail.body.parts.map(&:to_s)).to all(include(content))
   end
 
   def test_statut_bar(a_suivre: 0, suivi: 0, traite: 0, tous_les_dossiers: 0, archive: 0)