diff --git a/Rakefile b/Rakefile
index 6ec8da12..7fe305d4 100644
--- a/Rakefile
+++ b/Rakefile
@@ -11,4 +11,19 @@ RuboCop::RakeTask.new
 
 task default: %i[test]
 
-task lint: %i[rubocop]
\ No newline at end of file
+task lint: %i[rubocop]
+
+# Legacy tests task
+Minitest::TestTask.create(:legacy_test) do |t|
+  t.libs << "test"
+  t.test_globs = ["test/square_legacy/**/*_test.rb"]
+end
+
+# Integration tests
+task :integration_test do
+  integration_test_files = Dir.glob("test/square/integration/**/*.rb").sort
+  cmd = "ruby -Ilib:test:. -w -e 'require \"minitest/autorun\"; "
+  cmd += integration_test_files.map { |f| "require \"#{f}\"" }.join("; ")
+  cmd += "'"
+  sh cmd
+end
\ No newline at end of file
diff --git a/lib/square/customers/client.rb b/lib/square/customers/client.rb
index b5943675..7bea4a53 100644
--- a/lib/square/customers/client.rb
+++ b/lib/square/customers/client.rb
@@ -37,8 +37,13 @@ def list(request_options: {}, **params)
       #
       # @return [Square::Types::CreateCustomerResponse]
       def create(request_options: {}, **params)
-        _request = params
-        _response = @client.send(_request)
+        _response = @client.send(Internal::JSON::Request.new(
+          base_url: request_options[:base_url] || Square::Environment::SANDBOX,
+          path: "/v2/customers",
+          method: "POST",
+          body: Types::CreateCustomerRequest.new(params[:request]).to_h,
+          request_options: request_options
+        ))
         if _response.code >= "200" && _response.code < "300"
           return Square::Types::CreateCustomerResponse.load(_response.body)
         else
@@ -170,8 +175,20 @@ def update(request_options: {}, **params)
       #
       # @return [Square::Types::DeleteCustomerResponse]
       def delete(request_options: {}, **params)
-        _request = params
-        _response = @client.send(_request)
+        _request = Types::DeleteCustomersRequest.new(params[:request]).to_h
+        # Pull out path params explicitly
+        _customer_id = _request[:customer_id]
+        _request = _request.except(:customer_id)
+
+        
+        _query_params = _request
+        _response = @client.send(Internal::JSON::Request.new(
+          base_url: request_options[:base_url] || Square::Environment::SANDBOX,
+          path: "/v2/customers/#{_customer_id}",
+          method: "DELETE",
+          query: _query_params,
+          request_options: request_options
+        ))
         if _response.code >= "200" && _response.code < "300"
           return Square::Types::DeleteCustomerResponse.load(_response.body)
         else
diff --git a/test/square/integration/client_tests/test_customers.rb b/test/square/integration/client_tests/test_customers.rb
new file mode 100644
index 00000000..1eb37bf8
--- /dev/null
+++ b/test/square/integration/client_tests/test_customers.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+describe Square::Customers::Client do
+  describe "#create and delete customer" do
+    it "creates a customer" do
+
+      _create_request = Square::Customers::Types::CreateCustomerRequest.new(
+        given_name: "Amelia",
+        family_name: "Earhart",
+        email_address: "Amelia.Earhart@example.com",
+        address: {
+          address_line_1: "500 Electric Ave",
+          address_line_2: "Suite 600",
+          locality: "New York",
+          administrative_district_level_1: "NY",
+          postal_code: "10003",
+          country: "US"
+        },
+        phone_number: "+1-212-555-4240",
+        reference_id: "YOUR_REFERENCE_ID",
+        note: "a customer"
+      )
+
+      puts "create customer request #{_create_request.to_h}" if verbose?
+
+      response = client.customers.create(request: _create_request.to_h)
+      refute_nil response
+      assert_equal response.class, Square::Types::CreateCustomerResponse
+      refute_nil response.customer.id
+      refute_nil response.customer.version
+      puts "create customer response #{response.to_h}" if verbose?
+
+      _delete_request = Square::Customers::Types::DeleteCustomersRequest.new(
+        customer_id: response.customer.id,
+        version: response.customer.version
+      )
+
+      puts "delete customer request #{_delete_request.to_h}" if verbose?
+
+      response = client.customers.delete(request: _delete_request.to_h)
+      refute_nil response
+      assert_equal response.class, Square::Types::DeleteCustomerResponse
+      assert_nil response.errors
+      puts "delete customer response #{response.to_h}" if verbose?
+    end
+    it "validates hash behavior with optional fields" do
+      has_version = Square::Customers::Types::DeleteCustomersRequest.new(
+        customer_id: "123",
+        version: 1
+      ).to_h
+      missing_version = Square::Customers::Types::DeleteCustomersRequest.new(
+        customer_id: "123"
+      ).to_h
+
+      assert_equal has_version.keys.length, 2
+      assert_equal missing_version.keys.length, 1
+
+      has_version = has_version.except(:customer_id)
+      missing_version = missing_version.except(:customer_id)
+
+      assert_equal has_version.keys.length, 1
+      assert_equal missing_version.keys.length, 0
+    end
+  end
+end
\ No newline at end of file
diff --git a/test/square/integration/integration_test_base.rb b/test/square/integration/integration_test_base.rb
index 5abc6526..a34ca676 100644
--- a/test/square/integration/integration_test_base.rb
+++ b/test/square/integration/integration_test_base.rb
@@ -3,7 +3,7 @@
 require 'minitest/hell'
 require 'minitest/pride'
 require 'minitest/proveit'
-require_relative 'test_helper'
+require 'test_helper'
 
 class IntegrationTestBase < Minitest::Test
   parallelize_me!