diff --git a/test/integration/repp/v1/certificates/p12_test.rb b/test/integration/repp/v1/certificates/p12_test.rb
new file mode 100644
index 000000000..e04d37e40
--- /dev/null
+++ b/test/integration/repp/v1/certificates/p12_test.rb
@@ -0,0 +1,55 @@
+require 'test_helper'
+
+class ReppV1CertificatesP12Test < ActionDispatch::IntegrationTest
+  include ActiveJob::TestHelper
+
+  def setup
+    @user = users(:api_bestnames)
+    token = Base64.encode64("#{@user.username}:#{@user.plain_text_password}")
+    @auth_headers = { 'Authorization' => "Basic #{token}" }
+
+    adapter = ENV['shunter_default_adapter'].constantize.new
+    adapter&.clear!
+  end
+
+  def test_enqueues_p12_generation_job_and_returns_success
+    assert_enqueued_with(job: P12GeneratorJob, args: [@user.id.to_s]) do
+      post p12_repp_v1_certificates_path, headers: @auth_headers,
+                                          params: { p12: { api_user_id: @user.id } }
+    end
+
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :ok
+    assert_equal 1000, json[:code]
+    assert_equal 'P12 certificate generation started. Please refresh the page in a few seconds.',
+                 json[:message]
+  end
+
+  def test_returns_parameter_missing_when_p12_param_absent
+    post p12_repp_v1_certificates_path, headers: @auth_headers, params: {}
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal 2003, json[:code]
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV['shunter_default_threshold'] = '1'
+    ENV['shunter_enabled'] = 'true'
+
+    post p12_repp_v1_certificates_path, headers: @auth_headers,
+                                        params: { p12: { api_user_id: @user.id } }
+    post p12_repp_v1_certificates_path, headers: @auth_headers,
+                                        params: { p12: { api_user_id: @user.id } }
+
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal 2502, json[:code]
+    assert response.body.include?(Shunter.default_error_message)
+  ensure
+    ENV['shunter_default_threshold'] = '10000'
+    ENV['shunter_enabled'] = 'false'
+  end
+end