diff --git a/spec/lib/overrides_spec.rb b/spec/lib/overrides_spec.rb
new file mode 100644
index 0000000..d5f95c8
--- /dev/null
+++ b/spec/lib/overrides_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+# We make sure that the checksum of the file overridden is the same
+# as the expected. If this test fails, it means that the overridden
+# file should be updated to match any change/bug fix introduced in the core
+checksums = [
+  {
+    package: "decidim-core",
+    files: {
+      # views
+      "/app/views/layouts/decidim/footer/_mini.html.erb" => "cf7e273390b5a94b7df7167e37038ec4"
+    }
+  }
+]
+
+describe "Overridden files", type: :view do
+  checksums.each do |item|
+    spec = Gem::Specification.find_by_name(item[:package])
+    item[:files].each do |file, signature|
+      next unless spec
+
+      it "#{spec.gem_dir}#{file} matches checksum" do
+        expect(md5("#{spec.gem_dir}#{file}")).to eq(signature)
+      end
+    end
+  end
+
+  private
+
+  def md5(file)
+    Digest::MD5.hexdigest(File.read(file))
+  end
+end
diff --git a/spec/shared/visiting_organization_homepage.rb b/spec/shared/visiting_organization_homepage.rb
new file mode 100644
index 0000000..7d980be
--- /dev/null
+++ b/spec/shared/visiting_organization_homepage.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+shared_context "when visiting organization homepage" do
+  let(:organization) { create(:organization) }
+
+  before do
+    switch_to_host(organization.host)
+    visit decidim.root_path
+  end
+end
diff --git a/spec/system/eu_footer_spec.rb b/spec/system/eu_footer_spec.rb
new file mode 100644
index 0000000..11b4c74
--- /dev/null
+++ b/spec/system/eu_footer_spec.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe "Has EU footer", perform_enqueued: true do
+  include_context "when visiting organization homepage"
+
+  it "renders the eu flag in the footer" do
+    expect(page).to have_xpath("//img[@alt='European Union flag: Funded by the European Union']")
+  end
+end
diff --git a/spec/system/homepage_spec.rb b/spec/system/homepage_spec.rb
index 80a86f7..3ec4c1b 100644
--- a/spec/system/homepage_spec.rb
+++ b/spec/system/homepage_spec.rb
@@ -3,12 +3,7 @@
 require "rails_helper"
 
 describe "Visit the home page", perform_enqueued: true do
-  let(:organization) { create(:organization) }
-
-  before do
-    switch_to_host(organization.host)
-    visit decidim.root_path
-  end
+  include_context "when visiting organization homepage"
 
   it "renders the home page" do
     expect(page).to have_content("Home")
diff --git a/spec/system/platoniq_footer_spec.rb b/spec/system/platoniq_footer_spec.rb
new file mode 100644
index 0000000..3ec4c1b
--- /dev/null
+++ b/spec/system/platoniq_footer_spec.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe "Visit the home page", perform_enqueued: true do
+  include_context "when visiting organization homepage"
+
+  it "renders the home page" do
+    expect(page).to have_content("Home")
+  end
+end