diff --git a/.github/workflows/analysis.yaml b/.github/workflows/analysis.yaml
index 7bdac1c..89d1da7 100644
--- a/.github/workflows/analysis.yaml
+++ b/.github/workflows/analysis.yaml
@@ -20,7 +20,6 @@ jobs:
                     - 8.3
                 symfony:
                     - '6.4.*'
-                    - '7.2.*'
         env:
             APP_ENV: test
         steps:
@@ -59,7 +58,7 @@ jobs:
                 id: end-of-setup
             -
                 name: 'ECS - Run'
-                run: 'if [ -f ruleset/ecs.php ]; then vendor/bin/ecs check src/ tests/Behat/ --no-progress-bar -c ruleset/ecs.php ; else echo Ecs ruleset file does not exist, skipping step ; fi'
+                run: 'if [ -f ruleset/ecs.php ]; then vendor/bin/ecs check src/  --no-progress-bar -c ruleset/ecs.php ; else echo Ecs ruleset file does not exist, skipping step ; fi'
                 if: 'always() && steps.end-of-setup.outcome == ''success'''
             -
                 name: 'PHPStan - Run'
@@ -77,7 +76,3 @@ jobs:
                 name: 'GrumPHP - Run'
                 run: 'if [ -f grumphp.yml ]; then vendor/bin/grumphp run ; else echo Grumphp ruleset file does not exist, skipping step ; fi'
                 if: 'always() && steps.end-of-setup.outcome == ''success'''
-            -
-                uses: symfonycorp/security-checker-action@v5
-                if: 'always() && steps.end-of-setup.outcome == ''success'''
-                continue-on-error: true
diff --git a/.github/workflows/sylius.yaml b/.github/workflows/sylius.yaml
index 4ba909e..319cbd3 100644
--- a/.github/workflows/sylius.yaml
+++ b/.github/workflows/sylius.yaml
@@ -18,11 +18,13 @@ jobs:
                 php:
                     - 8.2
                     - 8.3
+                    - 8.4
                 sylius:
-                    - 2.0.0
+                    - 2.1.0
+                    - 2.2.0
                 symfony:
                     - 6.4
-                    - 7.2
+                    - 7.4
                 node:
                     - 20.x
         env:
@@ -77,48 +79,16 @@ jobs:
                     restore-keys: "node-${{ matrix.node }}-yarn-\n"
             -
                 name: 'Install Sylius-Standard and Plugin'
-                run: 'make install -e SYLIUS_VERSION=${{ matrix.sylius }} SYMFONY_VERSION=${{ matrix.symfony }} PHP_VERSION=${{ matrix.php }}'
-            -
-                name: 'Output PHP version for Symfony CLI'
-                working-directory: ./tests/Application
-                run: 'php -v | head -n 1 | awk ''{ print $2 }'' > .php-version'
-            -
-                name: 'Install certificates'
-                working-directory: ./tests/Application
-                run: 'symfony server:ca:install'
-            -
-                name: 'Run Chrome headless'
-                working-directory: ./tests/Application
-                run: 'google-chrome-stable --enable-automation --disable-background-networking --no-default-browser-check --no-first-run --disable-popup-blocking --disable-default-apps --allow-insecure-localhost --disable-translate --disable-extensions --no-sandbox --enable-features=Metal --headless --remote-debugging-port=9222 --window-size=2880,1800 --proxy-server=''direct://'' --proxy-bypass-list=''*'' https://127.0.0.1 > /dev/null 2>&1 &'
-            -
-                name: 'Run webserver'
-                working-directory: ./tests/Application
-                run: 'symfony server:start --port=8080 --dir=public --daemon'
-                id: end-of-setup-sylius
+                run: 'make install -e SYLIUS_VERSION=${{ matrix.sylius }} SYMFONY_VERSION=${{ matrix.symfony }}'
             -
                 name: 'Doctrine Schema Validate - Run'
-                working-directory: ./tests/Application
-                run: 'php bin/console doctrine:schema:validate --skip-sync'
+                run: 'php vendor/bin/console doctrine:schema:validate --skip-sync'
                 if: 'always() && steps.end-of-setup-sylius.outcome == ''success'''
             -
                 name: 'Run PHPUnit'
                 run: 'make phpunit'
                 if: 'always() && steps.end-of-setup-sylius.outcome == ''success'''
-            -
-                name: 'Configure Behat'
-                run: 'make behat-configure'
-                if: 'always() && steps.end-of-setup-sylius.outcome == ''success'''
-            -
-                name: 'Run behat'
-                working-directory: ./tests/Application
-                run: 'vendor/bin/behat --strict --no-interaction -f progress || vendor/bin/behat --strict -vvv --no-interaction --rerun'
-                if: 'always() && steps.end-of-setup-sylius.outcome == ''success'''
-            -
-                uses: actions/upload-artifact@v4
-                if: failure()
-                with:
-                    name: logs
-                    path: ./tests/Application/etc/build
+
         services:
             mariadb:
                 image: 'mariadb:10.4.11'
diff --git a/.gitignore b/.gitignore
index 1df3974..547af6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,7 @@
 /.phpunit.result.cache
 
 /.idea/
+
+/tests/TestApplication/.env.local
+/tests/TestApplication/.env.*.local
+/var/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 30b6106..7c10afb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -3,12 +3,12 @@
 From the plugin root directory, run the following commands:
 
 ```bash
-$ make install -e SYLIUS_VERSION=XX SYMFONY_VERSION=YY PHP_VERSION=ZZ
+$ make install -e SYLIUS_VERSION=XX SYMFONY_VERSION=YY
 ```
 
-Default values : XX=2.0 and YY=7.1 and ZZ=8.3
+Default values : XX=2.1 and YY=6.4
 
-To be able to set up the plugin database, remember to configure you database credentials
+To be able to set up the plugin database, remember to configure your database credentials
 in `install/Application/.env.local` and `install/Application/.env.test.local`.
 
 To reset test environment:
@@ -39,11 +39,11 @@ $ make reset
 - Using `test` environment:
 
     ```bash
-    $ (cd tests/Application && bin/console server:run -d public -e test)
+    $ APP_ENV=test symfony server:start -d
     ```
 
 - Using `dev` environment:
 
     ```bash
-    $ (cd tests/Application && bin/console server:run -d public -e dev)
+    $ symfony server:start -d
     ```
diff --git a/Makefile b/Makefile
index 3ad5233..bf7f9eb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,87 +1,42 @@
 .DEFAULT_GOAL := help
 SHELL=/bin/bash
-COMPOSER_ROOT=composer
-TEST_DIRECTORY=tests/Application
-INSTALL_DIRECTORY=install/Application
-CONSOLE=cd ${TEST_DIRECTORY} && php bin/console -e test
-COMPOSER=cd ${TEST_DIRECTORY} && composer
-YARN=cd ${TEST_DIRECTORY} && yarn
-
-SYLIUS_VERSION=2.0
-SYMFONY_VERSION=7.1
-PHP_VERSION=8.3
+CONSOLE=vendor/bin/console
+COMPOSER=composer
+SYLIUS_VERSION=2.1.0
+SYMFONY_VERSION=6.4
 PLUGIN_NAME=synolia/sylius-mail-tester-plugin
 
 ###
 ### DEVELOPMENT
 ### ¯¯¯¯¯¯¯¯¯¯¯
 
-install: sylius ## Install Plugin on Sylius [SYLIUS_VERSION=1.12.0] [SYMFONY_VERSION=6.1] [PHP_VERSION=8.1]
+install: sylius ## Install all dependencies with [SYLIUS_VERSION=2.1.0] [SYMFONY_VERSION=6.4]
 .PHONY: install
 
 reset: ## Remove dependencies
-ifneq ("$(wildcard ${TEST_DIRECTORY}/bin/console)","")
 	${CONSOLE} doctrine:database:drop --force --if-exists || true
-endif
-	rm -rf ${TEST_DIRECTORY}
+	rm -rf vendor
+	rm composer.lock
 .PHONY: reset
 
-phpunit: phpunit-configure phpunit-run ## Run PHPUnit
+phpunit: ## Run PHPUnit tests
+	./vendor/bin/phpunit --testdox
 .PHONY: phpunit
 
 ###
 ### OTHER
 ### ¯¯¯¯¯¯
 
-sylius: sylius-standard update-dependencies install-plugin install-sylius
+sylius: install-sylius
 .PHONY: sylius
 
-sylius-standard:
-ifeq ($(shell [[ $(SYLIUS_VERSION) == *dev ]] && echo true ),true)
-	${COMPOSER_ROOT} create-project sylius/sylius-standard:${SYLIUS_VERSION} ${TEST_DIRECTORY} --no-install --no-scripts
-else
-	${COMPOSER_ROOT} create-project sylius/sylius-standard ${TEST_DIRECTORY} "~${SYLIUS_VERSION}" --no-install --no-scripts
-endif
-	${COMPOSER} config allow-plugins true
-ifeq ($(shell [[ $(SYLIUS_VERSION) == *dev ]] && echo true ),true)
-	${COMPOSER} require sylius/sylius:"${SYLIUS_VERSION}"
-else
-	${COMPOSER} require sylius/sylius:"~${SYLIUS_VERSION}"
-endif
-
-update-dependencies:
-	${COMPOSER} config extra.symfony.require "~${SYMFONY_VERSION}"
-	${COMPOSER} require --dev donatj/mock-webserver:^2.1 --no-scripts --no-update
-	${COMPOSER} require symfony/asset:~${SYMFONY_VERSION} --no-scripts --no-update
-	${COMPOSER} update --no-progress -n
-
-install-plugin:
-	${COMPOSER} config repositories.plugin '{"type": "path", "url": "../../"}'
-	${COMPOSER} config extra.symfony.allow-contrib true
-	${COMPOSER} config minimum-stability "dev"
-	${COMPOSER} config prefer-stable true
-	${COMPOSER} req ${PLUGIN_NAME}:* --prefer-source --no-scripts
-	cp -r ${INSTALL_DIRECTORY} tests
-	cp -r tests/data/* ${TEST_DIRECTORY}/
-
 install-sylius:
-	${CONSOLE} sylius:install -n -s default
-	${YARN} install
-	${YARN} build
-	${CONSOLE} cache:clear
-
-phpunit-configure:
-	cp phpunit.xml.dist ${TEST_DIRECTORY}/phpunit.xml
-
-phpunit-run:
-	cd ${TEST_DIRECTORY} && ./vendor/bin/phpunit
+	@echo "Installing Sylius ${SYLIUS_VERSION} using TestApplication"
+	${COMPOSER} config extra.symfony.require "^${SYMFONY_VERSION}"
+	${COMPOSER} install
+	${COMPOSER} require --dev sylius/test-application:"~${SYLIUS_VERSION}@alpha" -n -W
+	${COMPOSER} test-application:install
 
-behat-configure: ## Configure Behat
-	(cd ${TEST_DIRECTORY} && cp behat.yml.dist behat.yml)
-	(cd ${TEST_DIRECTORY} && sed -i "s#vendor/sylius/sylius/src/Sylius/Behat/Resources/config/suites.yml#vendor/${PLUGIN_NAME}/tests/Behat/Resources/suites.yml#g" behat.yml)
-	(cd ${TEST_DIRECTORY} && sed -i "s#vendor/sylius/sylius/features#vendor/${PLUGIN_NAME}/features#g" behat.yml)
-	(cd ${TEST_DIRECTORY} && sed -i '2i \ \ \ \ - { resource: "../vendor/${PLUGIN_NAME}/tests/Behat/Resources/services.yaml" }' config/services_test.yaml)
-	${CONSOLE} cache:clear
 
 grumphp: ## Run GrumPHP
 	vendor/bin/grumphp run
diff --git a/assets/admin/entrypoint.js b/assets/admin/entrypoint.js
new file mode 100644
index 0000000..bbefcaa
--- /dev/null
+++ b/assets/admin/entrypoint.js
@@ -0,0 +1 @@
+// Mandatory by test application but useless
diff --git a/assets/controllers.json b/assets/controllers.json
new file mode 100644
index 0000000..2c63c08
--- /dev/null
+++ b/assets/controllers.json
@@ -0,0 +1,2 @@
+{
+}
diff --git a/assets/shop/entrypoint.js b/assets/shop/entrypoint.js
new file mode 100644
index 0000000..bbefcaa
--- /dev/null
+++ b/assets/shop/entrypoint.js
@@ -0,0 +1 @@
+// Mandatory by test application but useless
diff --git a/behat.yml.dist b/behat.yml.dist
deleted file mode 100644
index e95062e..0000000
--- a/behat.yml.dist
+++ /dev/null
@@ -1,61 +0,0 @@
-imports:
-    - vendor/sylius/sylius/src/Sylius/Behat/Resources/config/suites.yml
-    - tests/Behat/Resources/suites.yml
-
-default:
-    formatters:
-        pretty:
-            verbose: true
-            paths: false
-            snippets: false
-
-    extensions:
-        DMore\ChromeExtension\Behat\ServiceContainer\ChromeExtension: ~
-
-        FriendsOfBehat\MinkDebugExtension:
-            directory: etc/build
-            clean_start: false
-            screenshot: true
-
-        Behat\MinkExtension:
-            files_path: "%paths.base%/vendor/sylius/sylius/src/Sylius/Behat/Resources/fixtures/"
-            base_url: "http://localhost:8080/"
-            default_session: symfony
-            javascript_session: chrome
-            sessions:
-                symfony:
-                    symfony: ~
-                chrome:
-                    selenium2:
-                        browser: chrome
-                        capabilities:
-                            browserName: chrome
-                            browser: chrome
-                            version: ""
-                            marionette: null # https://github.com/Behat/MinkExtension/pull/311
-                            chrome:
-                                switches:
-                                    - "start-fullscreen"
-                                    - "start-maximized"
-                                    - "no-sandbox"
-                            extra_capabilities:
-                                acceptSslCerts: true
-                                acceptInsecureCerts: true
-                                unexpectedAlertBehaviour: accept
-                                goog:chromeOptions:
-                                    w3c: false # https://github.com/Sylius/Sylius/issues/10561
-                firefox:
-                    selenium2:
-                        browser: firefox
-            show_auto: false
-
-        FriendsOfBehat\SymfonyExtension:
-            bootstrap: tests/Application/config/bootstrap.php
-            kernel:
-                class: Tests\Synolia\SyliusMailTesterPlugin\Application\Kernel
-
-        FriendsOfBehat\VariadicExtension: ~
-
-    gherkin:
-        filters:
-            tags: "~@todo&&~@cli" # CLI is excluded as it registers an error handler that mutes fatal errors
diff --git a/composer.json b/composer.json
index 8a6d585..3e2d3e8 100644
--- a/composer.json
+++ b/composer.json
@@ -17,23 +17,10 @@
         "webmozart/assert": "^1.11"
     },
     "require-dev": {
-        "behat/behat": "3.19.0",
-        "behat/mink-selenium2-driver": "1.7.0",
-        "dmore/behat-chrome-extension": "1.4.0",
-        "dmore/chrome-mink-driver": "2.9.3",
-        "friends-of-behat/mink": "1.11.0",
-        "friends-of-behat/mink-browserkit-driver": "1.6.2",
-        "friends-of-behat/mink-debug-extension": "2.1.0",
-        "friends-of-behat/mink-extension": "2.7.5",
-        "friends-of-behat/page-object-extension": "0.3.2",
-        "friends-of-behat/symfony-extension": "2.6.0",
-        "friends-of-behat/variadic-extension": "1.6.0",
-        "friendsoftwig/twigcs": "6.4.0",
-        "j13k/yaml-lint": "1.1.6",
+        "friendsoftwig/twigcs": "6.6.0",
         "php-parallel-lint/php-parallel-lint": "1.4.0",
         "phpmd/phpmd": "2.15.0",
         "phpro/grumphp": "2.11.0",
-        "phpspec/phpspec": "7.5.0",
         "phpstan/extension-installer": "1.4.3",
         "phpstan/phpstan": "2.1.8",
         "phpstan/phpstan-doctrine": "2.0.2",
@@ -46,17 +33,22 @@
         "seld/jsonlint": "1.11.0",
         "squizlabs/php_codesniffer": "3.11.3",
         "sylius-labs/coding-standard": "4.4.0",
-        "symfony/browser-kit": "7.2.4",
-        "symfony/debug-bundle": "^7.2.0",
-        "symfony/dotenv": "7.2.0",
-        "symfony/lock": "7.2.4",
-        "symfony/web-profiler-bundle": "7.2.4"
+        "sylius/test-application": "~2.1.0@alpha",
+        "symfony/browser-kit": "^6.4 | ^7.4 | ^8.0",
+        "symfony/debug-bundle": "^6.4 | ^7.4 | ^8.0",
+        "symfony/dotenv": "^6.4 | ^7.4 | ^8.0",
+        "symfony/lock": "^6.4 | ^7.4 | ^8.0",
+        "symfony/web-profiler-bundle": "^6.4 | ^7.4 | ^8.0"
     },
     "prefer-stable": true,
     "autoload": {
         "psr-4": {
-            "Synolia\\SyliusMailTesterPlugin\\": "src/",
-            "Tests\\Synolia\\SyliusMailTesterPlugin\\": "tests/"
+            "Synolia\\SyliusMailTesterPlugin\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\Synolia\\SyliusMailTesterPlugin\\": ["tests/", "tests/TestApplication/src/"]
         }
     },
     "config": {
@@ -66,10 +58,46 @@
             "php-http/discovery": true,
             "phpro/grumphp": true,
             "phpstan/extension-installer": true,
+            "symfony/flex": true,
+            "symfony/runtime": true,
             "symfony/thanks": true
         }
     },
     "scripts": {
-        "fix-ecs": "ecs check -c ruleset/ecs.php --fix --ansi --clear-cache  ."
+        "ecs": "ecs check -c ruleset/ecs.php --ansi --clear-cache",
+        "fix-ecs": "@ecs --fix",
+        "phpmd": "phpmd src ansi ruleset/.php_md.xml",
+        "phpstan": "phpstan analyse src -c ruleset/phpstan.neon",
+        "phpunit": "phpunit tests/PHPUnit --colors=always",
+        "tests": [
+            "@ecs",
+            "@phpmd",
+            "@phpstan",
+            "@phpunit"
+        ],
+        "test-application:install": [
+            "vendor/bin/console doctrine:database:drop --force --if-exists -n",
+            "vendor/bin/console doctrine:database:create -n",
+            "vendor/bin/console doctrine:migration:migrate -n",
+            "vendor/bin/console sylius:payment:generate-key -n",
+            "vendor/bin/console sylius:fixtures:load -n",
+            "yarn --cwd vendor/sylius/test-application install --force",
+            "yarn --cwd vendor/sylius/test-application build",
+            "vendor/bin/console assets:install --symlink -n vendor/sylius/test-application/public",
+            "cp tests/TestApplication/public/.htaccess vendor/sylius/test-application/public"
+        ],
+        "test-application:front": [
+            "yarn --cwd vendor/sylius/test-application install --force",
+            "yarn --cwd vendor/sylius/test-application build"
+        ]
+    },
+    "extra": {
+        "public-dir": "vendor/sylius/test-application/public",
+        "symfony": {
+            "require": "^6.4"
+        }
+    },
+    "conflict": {
+        "sylius/test-application": "v2.0.0-ALPHA.1"
     }
 }
diff --git a/etc/build/.gitignore b/etc/build/.gitignore
deleted file mode 100644
index e69de29..0000000
diff --git a/features/ui/admin/change_form_by_subjects.feature b/features/ui/admin/change_form_by_subjects.feature
deleted file mode 100644
index 96d3775..0000000
--- a/features/ui/admin/change_form_by_subjects.feature
+++ /dev/null
@@ -1,16 +0,0 @@
-@managing_mail_tester
-Feature: Change form by subjects
-    In order to get the proper form for the subject
-    As an Administrator
-    I want to get the proper form for the subject
-
-    Background:
-        Given I am logged in as an administrator
-
-    @ui
-    Scenario: Change subjects to get their form
-        When I go to the mail tester page
-        Then I choose the subject contact_request
-        And I submit the subject
-        And the subject chosen in the form should be contact_request
-        Then the mail tester field "mail_tester[form_subject_chosen][data][email]" should be empty
\ No newline at end of file
diff --git a/features/ui/admin/check_mail_tester_fields.feature b/features/ui/admin/check_mail_tester_fields.feature
deleted file mode 100644
index 38be23b..0000000
--- a/features/ui/admin/check_mail_tester_fields.feature
+++ /dev/null
@@ -1,16 +0,0 @@
-@managing_mail_tester
-Feature: Check mail tester fields
-    In order to have every mail tester field
-    As an Administrator
-    I want to have every mail tester field
-
-    Background:
-        Given I am logged in as an administrator
-
-    @ui
-    Scenario: Check the recipient field
-        When I go to the mail tester page
-        Then the mail tester field "mail_tester[recipient]" should be empty
-        Then I write test in the field "mail_tester[recipient]"
-        Then the mail tester field "mail_tester[recipient]" should have test as value
-        Then the subjects should have every subjects
\ No newline at end of file
diff --git a/features/ui/admin/send_email.feature b/features/ui/admin/send_email.feature
deleted file mode 100644
index 8d56eba..0000000
--- a/features/ui/admin/send_email.feature
+++ /dev/null
@@ -1,28 +0,0 @@
-@managing_mail_tester
-Feature: Send an email
-    In order to send an email
-    As an Administrator
-    I want to send an email
-
-    Background:
-        Given I am logged in as an administrator
-
-    @ui
-    Scenario: Send contact_request mail
-        When I go to the mail tester page
-        Then I choose the subject contact_request
-        And I submit the subject
-        Then I write "test@test.com" in the field "mail_tester[recipient]"
-        And I write "test" in the field "mail_tester[form_subject_chosen][data][message]"
-        And I write "test@test.com" in the field "mail_tester[form_subject_chosen][data][email]"
-        Then I submit the email
-        And the email has been successfully send
-
-    @ui
-    Scenario: Send order_confirmation mail
-        When I go to the mail tester page
-        Then I choose the subject order_confirmation
-        And I submit the subject
-        Then I write "test@test.com" in the field "mail_tester[recipient]"
-        Then I submit the email
-        And the email has been successfully send
\ No newline at end of file
diff --git a/features/ui/admin/send_every_mails_in_one.feature b/features/ui/admin/send_every_mails_in_one.feature
deleted file mode 100644
index 3a5d75a..0000000
--- a/features/ui/admin/send_every_mails_in_one.feature
+++ /dev/null
@@ -1,24 +0,0 @@
-@managing_mail_tester
-Feature: Send every mails in one form
-    In order to every mails
-    As an Administrator
-    I want to every mails in one form
-
-    Background:
-        Given I am logged in as an administrator
-
-    @ui
-    Scenario: Send every mails in one form
-        When I go to the mail tester page
-        Then I choose the subject every_subjects
-        And I submit the subject
-        Then I write "test@test.com" in the field "mail_tester[recipient]"
-        And I write "test@test.com" in the field "mail_tester[contact_request][data][email]"
-        And I write "test" in the field "mail_tester[contact_request][data][message]"
-        And I write "test@test.com" in the field "mail_tester[my_dummy_form_type][data][email]"
-        And I write "test" in the field "mail_tester[my_dummy_form_type][data][message]"
-        And change value for "shop@example.com" in select "mail_tester[password_reset][user]"
-        And change value for "shop@example.com" in select "mail_tester[user_registration][user]"
-        And change value for "shop@example.com" in select "mail_tester[verification_token][user]"
-        Then I submit the email
-        And the email has been successfully send
diff --git a/install/Application/config/packages/mailtester.yaml b/install/Application/config/packages/mailtester.yaml
deleted file mode 100644
index 90562f5..0000000
--- a/install/Application/config/packages/mailtester.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-imports:
-    - { resource: "@SynoliaSyliusMailTesterPlugin/config/config.yaml" }
\ No newline at end of file
diff --git a/node_modules b/node_modules
deleted file mode 120000
index 9270531..0000000
--- a/node_modules
+++ /dev/null
@@ -1 +0,0 @@
-tests/Application/node_modules
\ No newline at end of file
diff --git a/phpspec.yml.dist b/phpspec.yml.dist
deleted file mode 100644
index 9142a14..0000000
--- a/phpspec.yml.dist
+++ /dev/null
@@ -1,4 +0,0 @@
-suites:
-    main:
-        namespace: Synolia\SyliusMailTesterPlugin
-        psr4_prefix: Synolia\SyliusMailTesterPlugin
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 289c057..3c68779 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,19 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/8.5/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          colors="true"
-         bootstrap="config/bootstrap.php">
+         bootstrap="vendor/sylius/test-application/config/bootstrap.php">
     <testsuites>
         <testsuite name="Test Suite">
-            <directory>vendor/synolia/sylius-mail-tester-plugin/tests/PHPUnit</directory>
+            <directory>tests/PHPUnit</directory>
         </testsuite>
     </testsuites>
 
     <php>
         <ini name="error_reporting" value="-1" />
 
-        <server name="KERNEL_CLASS_PATH" value="src/Kernel.php" />
+        <server name="KERNEL_CLASS" value="\Sylius\TestApplication\Kernel" />
         <server name="IS_DOCTRINE_ORM_SUPPORTED" value="true" />
 
         <server name="APP_ENV" value="test" force="true" />
diff --git a/ruleset/.php_md.xml b/ruleset/.php_md.xml
index 3de7b13..266cdf5 100644
--- a/ruleset/.php_md.xml
+++ b/ruleset/.php_md.xml
@@ -48,6 +48,5 @@
     </rule>
 
     <exclude-pattern>src/Migrations/*</exclude-pattern>
-    <exclude-pattern>spec/*</exclude-pattern>
     <exclude-pattern>tests/*</exclude-pattern>
 </ruleset>
diff --git a/ruleset/ecs.php b/ruleset/ecs.php
index 7194a38..36eeea7 100644
--- a/ruleset/ecs.php
+++ b/ruleset/ecs.php
@@ -9,9 +9,7 @@
 
     $ecsConfig->paths([
         dirname(__DIR__, 1) . '/src',
-        dirname(__DIR__, 1) . '/tests/Behat',
         dirname(__DIR__, 1) . '/tests/PHPUnit',
-        dirname(__DIR__, 1) . '/spec',
     ]);
 
     /** @phpstan-ignore-next-line  */
diff --git a/ruleset/phpstan.neon b/ruleset/phpstan.neon
index c7dbe49..184d8a3 100644
--- a/ruleset/phpstan.neon
+++ b/ruleset/phpstan.neon
@@ -7,9 +7,6 @@ parameters:
         # Makes PHPStan crash
         - ../src/Form/Type/Plugin/InvoicingPlugin/InvoiceType.php
 
-        # PHPSpec
-        - ../spec
-
     ignoreErrors:
         - identifier: missingType.iterableValue
         - identifier: missingType.generics
diff --git a/spec/SynoliaSyliusMailTesterPluginSpec.php b/spec/SynoliaSyliusMailTesterPluginSpec.php
deleted file mode 100644
index 5941236..0000000
--- a/spec/SynoliaSyliusMailTesterPluginSpec.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace spec\Synolia\SyliusMailTesterPlugin;
-
-use PhpSpec\ObjectBehavior;
-use Synolia\SyliusMailTesterPlugin\SynoliaSyliusMailTesterPlugin;
-
-final class SynoliaSyliusMailTesterPluginSpec extends ObjectBehavior
-{
-    function it_is_initializable()
-    {
-        $this->shouldHaveType(SynoliaSyliusMailTesterPlugin::class);
-    }
-}
diff --git a/tests/Behat/Context/Ui/Admin/MailTesterContext.php b/tests/Behat/Context/Ui/Admin/MailTesterContext.php
deleted file mode 100644
index ac057d6..0000000
--- a/tests/Behat/Context/Ui/Admin/MailTesterContext.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Tests\Synolia\SyliusMailTesterPlugin\Behat\Context\Ui\Admin;
-
-use Behat\Behat\Context\Context;
-use Behat\Mink\Element\NodeElement;
-use FriendsOfBehat\PageObjectExtension\Page\SymfonyPageInterface;
-use Sylius\Behat\NotificationType;
-use Sylius\Behat\Service\NotificationCheckerInterface;
-use Sylius\Behat\Service\Resolver\CurrentPageResolverInterface;
-use Symfony\Component\DependencyInjection\Attribute\Autowire;
-use Symfony\Contracts\Translation\TranslatorInterface;
-use Synolia\SyliusMailTesterPlugin\DataRetriever\EmailKeysDataRetriever;
-use Tests\Synolia\SyliusMailTesterPlugin\Behat\Page\Admin\MailTester\IndexPageInterface;
-use Webmozart\Assert\Assert;
-
-final class MailTesterContext implements Context
-{
-    public function __construct(
-        private IndexPageInterface $indexPage,
-        #[Autowire('@sylius.behat.current_page_resolver')]
-        private CurrentPageResolverInterface $currentPageResolver,
-        private EmailKeysDataRetriever $emailKeysDataRetriever,
-        #[Autowire('@sylius.behat.notification_checker.admin')]
-        private NotificationCheckerInterface $notificationChecker,
-        private TranslatorInterface $translator,
-    ) {
-    }
-
-    /**
-     * @return IndexPageInterface|SymfonyPageInterface
-     */
-    private function resolveCurrentPage(): SymfonyPageInterface
-    {
-        return $this->currentPageResolver->getCurrentPageWithForm([
-            $this->indexPage,
-        ]);
-    }
-
-    /**
-     * @When I go to the mail tester page
-     */
-    public function iGoToTheMailTesterPage(): void
-    {
-        $this->indexPage->open();
-    }
-
-    /**
-     * @Then the mail tester field :field should be empty
-     */
-    public function theMailTesterFieldShouldBeEmpty(string $field): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        Assert::isEmpty($currentPage->getFieldValue($field));
-    }
-
-    /**
-     * @Then I choose the subject :subject
-     */
-    public function iChooseTheSubject(string $subject): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        /** @var NodeElement|null $mailTesterSubject */
-        $mailTesterSubject = $currentPage->writeInField($subject, 'mail_tester[subjects]');
-        $mailTesterSubjectValue = '';
-        if ($mailTesterSubject !== null) {
-            /** @var string $mailTesterSubjectValue */
-            $mailTesterSubjectValue = $mailTesterSubject->getValue();
-        }
-        Assert::contains($subject, $mailTesterSubjectValue);
-    }
-
-    /**
-     * @Then the subject chosen in the form should be :subject
-     */
-    public function theSubjectChooseInTheFormShouldBe(string $subject): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $mailTesterSubjectValue = $currentPage->getFieldValue('mail_tester[subjects]');
-        Assert::eq($subject, $mailTesterSubjectValue);
-    }
-
-    /**
-     * @Then I submit the subject
-     */
-    public function iSubmitTheSubject(): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $currentPage->pressButton('mail_tester[change_form_subject]');
-    }
-
-    /**
-     * @Then I submit the email
-     */
-    public function iSubmitTheEmail(): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $currentPage->pressButton('mail_tester[submit]');
-    }
-
-    /**
-     * @Then the mail tester field :field should not be empty
-     */
-    public function theMailTesterFieldShouldNotBeEmpty(string $field): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        Assert::notEmpty($currentPage->getFieldValue($field));
-    }
-
-    /**
-     * @Then I write :text in the field :field
-     */
-    public function iWriteInTheField(string $text, string $field): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $currentPage->writeInField($text, $field);
-    }
-
-    /**
-     * @Then change value for :value in select :select
-     */
-    public function changeValueForInSelect(string $value, string $select): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $currentPage->changeSelectValue($value, $select);
-    }
-
-    /**
-     * @Then the mail tester field :field should have :text as value
-     */
-    public function theMailTesterFiledShouldHaveAsValue(string $field, string $text): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        $fieldValue = $currentPage->getFieldValue($field);
-        Assert::string($fieldValue);
-        Assert::contains($fieldValue, $text);
-    }
-
-    /**
-     * @Then the subjects should have every subjects
-     */
-    public function theSubjectsShouldHaveEverySubjects(): void
-    {
-        /** @var IndexPageInterface $currentPage */
-        $currentPage = $this->resolveCurrentPage();
-        foreach ($this->emailKeysDataRetriever->getEmailKeys() as $emailKey) {
-            Assert::contains($currentPage->getSelectorHtml('mail_tester[subjects]'), $emailKey);
-        }
-    }
-
-    /**
-     * @Then the email has been successfully send
-     */
-    public function theEmailHasBeenSuccessfullySend(): void
-    {
-        $this->notificationChecker->checkNotification(
-            $this->translator->trans('sylius.ui.admin.mail_tester.success'),
-            NotificationType::success(),
-        );
-    }
-}
diff --git a/tests/Behat/Page/Admin/MailTester/IndexPage.php b/tests/Behat/Page/Admin/MailTester/IndexPage.php
deleted file mode 100644
index f34a7c6..0000000
--- a/tests/Behat/Page/Admin/MailTester/IndexPage.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Tests\Synolia\SyliusMailTesterPlugin\Behat\Page\Admin\MailTester;
-
-use Behat\Mink\Element\NodeElement;
-use Sylius\Behat\Page\Admin\Crud\IndexPage as BaseIndexPage;
-
-final class IndexPage extends BaseIndexPage implements IndexPageInterface
-{
-    public function getField(string $field): ?NodeElement
-    {
-        return $this->getDocument()->findField($field);
-    }
-
-    /** @return string|bool|array */
-    public function getFieldValue(string $field)
-    {
-        $field = $this->getDocument()->findField($field);
-        if ($field === null) {
-            return '';
-        }
-
-        /** @var string|bool|array|null $value */
-        $value = $field->getValue();
-        if ($value === null) {
-            return '';
-        }
-
-        return $value;
-    }
-
-    public function getSelectorHtml(string $field): string
-    {
-        $field = $this->getDocument()->findField($field);
-        if ($field === null) {
-            return '';
-        }
-
-        return $field->getOuterHtml();
-    }
-
-    public function writeInField(string $text, string $field): ?NodeElement
-    {
-        $field = $this->getDocument()->findField($field);
-        if ($field === null) {
-            return null;
-        }
-
-        $field->setValue($text);
-
-        return $field;
-    }
-
-    public function changeSelectValue(string $value, string $select): void
-    {
-        $field = $this->getDocument()->findField($select);
-        if ($field === null) {
-            return;
-        }
-
-        $field->selectOption($value);
-    }
-
-    public function pressButton(string $field): void
-    {
-        $this->getDocument()->pressButton($field);
-    }
-}
diff --git a/tests/Behat/Page/Admin/MailTester/IndexPageInterface.php b/tests/Behat/Page/Admin/MailTester/IndexPageInterface.php
deleted file mode 100644
index 07253dd..0000000
--- a/tests/Behat/Page/Admin/MailTester/IndexPageInterface.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Tests\Synolia\SyliusMailTesterPlugin\Behat\Page\Admin\MailTester;
-
-use Behat\Mink\Element\NodeElement;
-use Sylius\Behat\Page\Admin\Crud\IndexPageInterface as BaseIndexPageInterface;
-
-interface IndexPageInterface extends BaseIndexPageInterface
-{
-    public function getField(string $field): ?NodeElement;
-
-    /** @return string|bool|array */
-    public function getFieldValue(string $field);
-
-    public function getSelectorHtml(string $field): string;
-
-    public function writeInField(string $text, string $field): ?NodeElement;
-
-    public function changeSelectValue(string $value, string $select): void;
-
-    public function pressButton(string $field): void;
-}
diff --git a/tests/Behat/Resources/services.yaml b/tests/Behat/Resources/services.yaml
deleted file mode 100644
index 6bca5a4..0000000
--- a/tests/Behat/Resources/services.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-services:
-    Sylius\Behat\Service\SharedStorageInterface: '@sylius.behat.shared_storage'
-
-    synolia_mail_tester_plugin.behat.page.admin.mail_tester.index:
-        class: Tests\Synolia\SyliusMailTesterPlugin\Behat\Page\Admin\MailTester\IndexPage
-        parent: sylius.behat.page.admin.crud.index
-        public: false
-        arguments:
-            - 'sylius_admin_mail_tester'
-
-    synolia_mail_tester_plugin.behat.admin.mail_tester:
-        class: Tests\Synolia\SyliusMailTesterPlugin\Behat\Context\Ui\Admin\MailTesterContext
-        public: true
-        autowire: true
-        arguments:
-            $indexPage: '@synolia_mail_tester_plugin.behat.page.admin.mail_tester.index'
diff --git a/tests/Behat/Resources/suites.yml b/tests/Behat/Resources/suites.yml
deleted file mode 100644
index 31000af..0000000
--- a/tests/Behat/Resources/suites.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-# Put your Behat suites definitions here
-
-default:
-    suites:
-        ui_managing_mail_tester:
-            contexts:
-                - sylius.behat.context.setup.admin_security
-                - synolia_mail_tester_plugin.behat.admin.mail_tester
-            filters:
-                tags: '@managing_mail_tester&&@ui'
diff --git a/tests/TestApplication/.env b/tests/TestApplication/.env
new file mode 100644
index 0000000..d112aea
--- /dev/null
+++ b/tests/TestApplication/.env
@@ -0,0 +1,7 @@
+DATABASE_URL=mysql://root@127.0.0.1/test_application_%kernel.environment%
+
+SYLIUS_TEST_APP_CONFIGS_TO_IMPORT="@SynoliaSyliusMailTesterPlugin/tests/TestApplication/config/config.yaml"
+SYLIUS_TEST_APP_ROUTES_TO_IMPORT="@SynoliaSyliusMailTesterPlugin/tests/TestApplication/config/routing.yaml"
+SYLIUS_TEST_APP_BUNDLES_TO_ENABLE="Synolia\SyliusMailTesterPlugin\SynoliaSyliusMailTesterPlugin"
+
+SYLIUS_MESSENGER_TRANSPORT_PAYMENT_REQUEST_DSN="sync://"
diff --git a/tests/TestApplication/config/config.yaml b/tests/TestApplication/config/config.yaml
new file mode 100644
index 0000000..10e7c60
--- /dev/null
+++ b/tests/TestApplication/config/config.yaml
@@ -0,0 +1,30 @@
+imports:
+    - { resource: "@SynoliaSyliusMailTesterPlugin/config/config.yaml" }
+
+# Uncomment if need to override entities with trait for example
+#doctrine:
+#    orm:
+#        entity_managers:
+#            default:
+#                mappings:
+#                    TestApplication:
+#                        is_bundle: false
+#                        type: attribute
+#                        dir: '%kernel.project_dir%/../../../tests/TestApplication/src/Entity'
+#                        prefix: Tests\Synolia\SyliusMailTesterPlugin
+
+sylius_mailer:
+    emails:
+        verification_token:
+            enabled: false
+        my_dummy_form_type:
+            subject: dummy.test
+            template: "@SyliusCore/Email/contactRequest.html.twig"
+
+services:
+    _defaults:
+        autowire: true
+        autoconfigure: true
+
+    Tests\Synolia\SyliusMailTesterPlugin\:
+        resource: '../src/*'
diff --git a/install/Application/config/routes/sylius_mail_tester.yaml b/tests/TestApplication/config/routing.yaml
similarity index 100%
rename from install/Application/config/routes/sylius_mail_tester.yaml
rename to tests/TestApplication/config/routing.yaml
diff --git a/tests/TestApplication/public/.htaccess b/tests/TestApplication/public/.htaccess
new file mode 100644
index 0000000..082060e
--- /dev/null
+++ b/tests/TestApplication/public/.htaccess
@@ -0,0 +1,70 @@
+# Use the front controller as index file. It serves as a fallback solution when
+# every other rewrite/redirect fails (e.g. in an aliased environment without
+# mod_rewrite). Additionally, this reduces the matching process for the
+# start page (path "/") because otherwise Apache will apply the rewriting rules
+# to each configured DirectoryIndex file (e.g. index.php, index.html, index.pl).
+DirectoryIndex index.php
+
+# By default, Apache does not evaluate symbolic links if you did not enable this
+# feature in your server configuration. Uncomment the following line if you
+# install assets as symlinks or if you experience problems related to symlinks
+# when compiling LESS/Sass/CoffeScript assets.
+# Options +SymLinksIfOwnerMatch
+
+# Disabling MultiViews prevents unwanted negotiation, e.g. "/index" should not resolve
+# to the front controller "/index.php" but be rewritten to "/index.php/index".
+<IfModule mod_negotiation.c>
+    Options -MultiViews
+</IfModule>
+
+<IfModule mod_rewrite.c>
+    # This Option needs to be enabled for RewriteRule, otherwise it will show an error like
+    # 'Options FollowSymLinks or SymLinksIfOwnerMatch is off which implies that RewriteRule directive is forbidden'
+    Options +SymLinksIfOwnerMatch
+
+    RewriteEngine On
+
+    # Determine the RewriteBase automatically and set it as environment variable.
+    # If you are using Apache aliases to do mass virtual hosting or installed the
+    # project in a subdirectory, the base path will be prepended to allow proper
+    # resolution of the index.php file and to redirect to the correct URI. It will
+    # work in environments without path prefix as well, providing a safe, one-size
+    # fits all solution. But as you do not need it in this case, you can comment
+    # the following 2 lines to eliminate the overhead.
+    RewriteCond %{REQUEST_URI}::$0 ^(/.+)/(.*)::\2$
+    RewriteRule .* - [E=BASE:%1]
+
+    # Sets the HTTP_AUTHORIZATION header removed by Apache
+    RewriteCond %{HTTP:Authorization} .+
+    RewriteRule ^ - [E=HTTP_AUTHORIZATION:%0]
+
+    # Redirect to URI without front controller to prevent duplicate content
+    # (with and without `/index.php`). Only do this redirect on the initial
+    # rewrite by Apache and not on subsequent cycles. Otherwise we would get an
+    # endless redirect loop (request -> rewrite to front controller ->
+    # redirect -> request -> ...).
+    # So in case you get a "too many redirects" error or you always get redirected
+    # to the start page because your Apache does not expose the REDIRECT_STATUS
+    # environment variable, you have 2 choices:
+    # - disable this feature by commenting the following 2 lines or
+    # - use Apache >= 2.3.9 and replace all L flags by END flags and remove the
+    #   following RewriteCond (best solution)
+    RewriteCond %{ENV:REDIRECT_STATUS} =""
+    RewriteRule ^index\.php(?:/(.*)|$) %{ENV:BASE}/$1 [R=308,L]
+
+    # If the requested filename exists, simply serve it.
+    # We only want to let Apache serve files and not directories.
+    # Rewrite all other queries to the front controller.
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteRule ^ %{ENV:BASE}/index.php [L]
+</IfModule>
+
+<IfModule !mod_rewrite.c>
+    <IfModule mod_alias.c>
+        # When mod_rewrite is not available, we instruct a temporary redirect of
+        # the start page to the front controller explicitly so that the website
+        # and the generated links can still be used.
+        RedirectMatch 307 ^/$ /index.php/
+        # RedirectTemp cannot be used instead
+    </IfModule>
+</IfModule>
diff --git a/tests/data/src/Form/Type/DummyFormType.php b/tests/TestApplication/src/Form/Type/DummyFormType.php
similarity index 93%
rename from tests/data/src/Form/Type/DummyFormType.php
rename to tests/TestApplication/src/Form/Type/DummyFormType.php
index 9e74b1d..055bae6 100644
--- a/tests/data/src/Form/Type/DummyFormType.php
+++ b/tests/TestApplication/src/Form/Type/DummyFormType.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace App\Form\Type;
+namespace Tests\Synolia\SyliusMailTesterPlugin\Form\Type;
 
 use Symfony\Component\Form\Extension\Core\Type\EmailType;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
diff --git a/tests/app/config/packages/mailtester.yaml b/tests/app/config/packages/mailtester.yaml
deleted file mode 100644
index 90562f5..0000000
--- a/tests/app/config/packages/mailtester.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-imports:
-    - { resource: "@SynoliaSyliusMailTesterPlugin/config/config.yaml" }
\ No newline at end of file
diff --git a/tests/data/config/packages/test/sylius_mailer.yaml b/tests/data/config/packages/test/sylius_mailer.yaml
deleted file mode 100644
index 105c8eb..0000000
--- a/tests/data/config/packages/test/sylius_mailer.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-sylius_mailer:
-    emails:
-        verification_token:
-            enabled: false
-        my_dummy_form_type:
-            subject: dummy.test
-            template: "@SyliusCore/Email/contactRequest.html.twig"