diff --git a/app/components/layout/common_html_attributes_component.rb b/app/components/layout/common_html_attributes_component.rb
index 41cb8323b..bface8c6c 100644
--- a/app/components/layout/common_html_attributes_component.rb
+++ b/app/components/layout/common_html_attributes_component.rb
@@ -4,7 +4,7 @@ class Layout::CommonHTMLAttributesComponent < ApplicationComponent
   private
 
     def attributes
-      sanitize([dir, lang].compact.join(" "))
+      sanitize([dir, lang, html_class].compact.join(" "))
     end
 
     def dir
@@ -14,4 +14,8 @@ class Layout::CommonHTMLAttributesComponent < ApplicationComponent
     def lang
       "lang=\"#{I18n.locale}\""
     end
+
+    def html_class
+      "class=\"tenant-#{Tenant.current_schema}\"" if Rails.application.config.multitenancy
+    end
 end
diff --git a/spec/components/layout/common_html_attributes_component_spec.rb b/spec/components/layout/common_html_attributes_component_spec.rb
index 2d6fc3238..ded22103c 100644
--- a/spec/components/layout/common_html_attributes_component_spec.rb
+++ b/spec/components/layout/common_html_attributes_component_spec.rb
@@ -3,16 +3,36 @@ require "rails_helper"
 describe Layout::CommonHTMLAttributesComponent do
   let(:component) { Layout::CommonHTMLAttributesComponent.new }
 
-  it "includes the default language by default" do
-    render_inline component
+  context "with multitenancy disabled" do
+    before { allow(Rails.application.config).to receive(:multitenancy).and_return(false) }
 
-    expect(page.text).to eq 'lang="en"'
+    it "includes the default language by default" do
+      render_inline component
+
+      expect(page.text).to eq 'lang="en"'
+    end
+
+    it "includes the current language" do
+      I18n.with_locale(:es) { render_inline component }
+
+      expect(page.text).to eq 'lang="es"'
+    end
   end
 
-  it "includes the current language" do
-    I18n.with_locale(:es) { render_inline component }
+  context "with multitenancy enabled" do
+    it "includes a class with the 'public' suffix for the default tenant" do
+      render_inline component
 
-    expect(page.text).to eq 'lang="es"'
+      expect(page.text).to eq 'lang="en" class="tenant-public"'
+    end
+
+    it "includes a class with the schema name as suffix for other tenants" do
+      allow(Tenant).to receive(:current_schema).and_return "private"
+
+      render_inline component
+
+      expect(page.text).to eq 'lang="en" class="tenant-private"'
+    end
   end
 
   context "RTL languages" do
@@ -25,10 +45,22 @@ describe Layout::CommonHTMLAttributesComponent do
 
     after { I18n.enforce_available_locales = default_enforce }
 
-    it "includes the dir attribute" do
-      I18n.with_locale(:ar) { render_inline component }
+    context "with multitenancy disabled" do
+      before { allow(Rails.application.config).to receive(:multitenancy).and_return(false) }
 
-      expect(page.text).to eq 'dir="rtl" lang="ar"'
+      it "includes the dir attribute" do
+        I18n.with_locale(:ar) { render_inline component }
+
+        expect(page.text).to eq 'dir="rtl" lang="ar"'
+      end
+    end
+
+    context "with multitenancy enabled" do
+      it "includes the dir and the class attributes" do
+        I18n.with_locale(:ar) { render_inline component }
+
+        expect(page.text).to eq 'dir="rtl" lang="ar" class="tenant-public"'
+      end
     end
   end
 end
diff --git a/spec/system/multitenancy_spec.rb b/spec/system/multitenancy_spec.rb
index ef1a90564..ef161fb9c 100644
--- a/spec/system/multitenancy_spec.rb
+++ b/spec/system/multitenancy_spec.rb
@@ -28,12 +28,16 @@ describe "Multitenancy" do
       visit polls_path
 
       expect(page).to have_content "Human rights for Martians?"
+      expect(page).to have_css "html.tenant-mars"
+      expect(page).not_to have_css "html.tenant-venus"
     end
 
     with_subdomain("venus") do
       visit polls_path
 
       expect(page).to have_content "There are no open votings"
+      expect(page).to have_css "html.tenant-venus"
+      expect(page).not_to have_css "html.tenant-mars"
     end
   end