diff --git a/actionpack/test/dispatch/cookies_test.rb b/actionpack/test/dispatch/cookies_test.rb
index 23716c0aeb7b6..6f4b78c7208ea 100644
--- a/actionpack/test/dispatch/cookies_test.rb
+++ b/actionpack/test/dispatch/cookies_test.rb
@@ -247,6 +247,11 @@ def set_cookie_with_domain_and_tld
       head :ok
     end
 
+    def set_cookie_with_domain_and_longer_tld
+      cookies[:user_name] = { value: "rizwanreza", domain: :all, tld_length: 4 }
+      head :ok 
+    end
+
     def delete_cookie_with_domain_and_tld
       cookies.delete(:user_name, domain: :all, tld_length: 2)
       head :ok
@@ -1044,6 +1049,13 @@ def test_cookie_with_all_domain_option_using_australian_style_tld
     assert_cookie_header "user_name=rizwanreza; domain=.nextangle.com.au; path=/; SameSite=Lax"
   end
 
+  def test_cookie_with_all_domain_option_using_australian_style_tld_and_two_subdomains
+    @request.host = "x.nextangle.com.au"
+    get :set_cookie_with_domain
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; domain=.nextangle.com.au; path=/; SameSite=Lax"
+  end
+
   def test_cookie_with_all_domain_option_using_uk_style_tld
     @request.host = "nextangle.co.uk"
     get :set_cookie_with_domain
@@ -1051,6 +1063,13 @@ def test_cookie_with_all_domain_option_using_uk_style_tld
     assert_cookie_header "user_name=rizwanreza; domain=.nextangle.co.uk; path=/; SameSite=Lax"
   end
 
+  def test_cookie_with_all_domain_option_using_uk_style_tld_and_two_subdomains
+    @request.host = "x.nextangle.co.uk"
+    get :set_cookie_with_domain
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; domain=.nextangle.co.uk; path=/; SameSite=Lax"
+  end
+
   def test_cookie_with_all_domain_option_using_host_with_port
     @request.host = "nextangle.local:3000"
     get :set_cookie_with_domain
@@ -1113,6 +1132,13 @@ def test_cookie_with_all_domain_option_using_host_with_port_and_tld_length
     assert_cookie_header "user_name=rizwanreza; domain=.nextangle.local; path=/; SameSite=Lax"
   end
 
+  def test_cookie_with_all_domain_option_using_longer_tld_length
+    @request.host = "x.y.z.t.com"
+    get :set_cookie_with_domain_and_longer_tld
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; domain=.y.z.t.com; path=/; SameSite=Lax"
+  end
+
   def test_deleting_cookie_with_all_domain_option_and_tld_length
     request.cookies[:user_name] = "Joe"
     get :delete_cookie_with_domain_and_tld