diff --git a/README.md b/README.md
index 0a8db06..b2aef9a 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ CakePHP integration for Sentry.
 [![License](https://poser.pugx.org/connehito/cake-sentry/license)](https://packagist.org/packages/connehito/cake-sentry)
 
 ## Requirements
-- PHP 7.2+
+- PHP 7.2+ / PHP 8.0+
 - CakePHP 4.0+
 - and [Sentry](https://sentry.io) account
 
@@ -21,6 +21,23 @@ CakePHP integration for Sentry.
 composer require connehito/cake-sentry:^3.0
 ```
 
+If you do not have the ` php-http/async-client-implementation` package, you will need to install it together.  
+In that case, you will get a message like the following
+
+```
+Problem 1
+- sentry/sentry[3.2.0, ... , 3.3.0] require php-http/async-client-implementation ^1.0 -> could not be found in any version, but the following packages provide it:
+```
+
+Then, you can use the following command to provide a package such as `symfony/http-client`.
+
+```
+composer require connehito/cake-sentry symfony/http-client
+```
+
+You can find the available packages on [Packagist](https://packagist.org/providers/php-http/async-client-implementation).
+
+
 ## Usage
 
 ### Set config files.
diff --git a/tests/test_app/README.md b/tests/test_app/README.md
index d2088ee..7d22228 100644
--- a/tests/test_app/README.md
+++ b/tests/test_app/README.md
@@ -16,7 +16,7 @@ Before do it, you must create Sentry PJ and get your DSN.
 Please check Sentry's document about DSN  
 https://docs.sentry.io/error-reporting/quickstart/?platform=php#configure-the-sdk
 
-1. `cp tests/test_app/app/config/.env.example tests/test_app/app/config/.env`.
+1. `cp tests/test_app/app/config/.env.example tests/test_app/app/app.env`.
 2. Set your DSN to `.env`.
 3. `docker-compose run --rm  test-app bash` to go into container.
 4. `cd /app/tests/test_app & composer install` if vendor dir is not created.
@@ -24,6 +24,9 @@ https://docs.sentry.io/error-reporting/quickstart/?platform=php#configure-the-sd
 6. `docker-compose up` to run CakePHP built-in server.
 7. Access bellow urls.
 
+### On PHP7 container
+You can use `test-app-php7` instead of `test-app`.
+
 ### To check error
 `http://127.0.0.1:8080/error/:error_level`
 
@@ -49,3 +52,16 @@ Like:
 
 If you add `?message` query, then set error message.
 Like `http://127.0.0.1:8080/exception/method_not_allowed/400?message=you%20cant%20access%20here`
+
+### To check log
+`http://127.0.0.1:8080/log/:log_level_name`
+
+Replace `:log_level_name` to log level's name.
+
+Like:
+
+* http://127.0.0.1:8080/log/info // log message as LOG_INFO
+* http://127.0.0.1:8080/log/notice // log message as LOG_NOTICE
+
+If you add `?message` query, then set error message.
+Like `http://127.0.0.1:8080/log/warning?message=some-events-to-logging`