# The pdo_mysql extension tests You must set the following environment variables to run the tests: ```bash # DSN; For example: mysql:dbname=test;host=localhost;port=3306 PDO_MYSQL_TEST_DSN # Database host PDO_MYSQL_TEST_HOST # Database (schema) name PDO_MYSQL_TEST_DB # Database server socket PDO_MYSQL_TEST_SOCKET # Storage engine to use PDO_MYSQL_TEST_ENGINE # Database user PDO_MYSQL_TEST_USER # Database user password PDO_MYSQL_TEST_PASS # Database charset PDO_MYSQL_TEST_CHARSET ``` NOTE: if any of `PDO_MYSQL_TEST_[HOST|DB|SOCKET|ENGINE|CHARSET]` is part of `PDO_MYSQL_TEST_DSN`, the values must match. That is, for example, for `PDO_MYSQL_TEST_DSN = mysql:dbname=test` you MUST set `PDO_MYSQL_TEST_DB=test`.