diff --git a/src/test/java/io/asyncer/r2dbc/mysql/IntegrationTestSupport.java b/src/test/java/io/asyncer/r2dbc/mysql/IntegrationTestSupport.java
index 26d4e7728..5b8399f59 100644
--- a/src/test/java/io/asyncer/r2dbc/mysql/IntegrationTestSupport.java
+++ b/src/test/java/io/asyncer/r2dbc/mysql/IntegrationTestSupport.java
@@ -101,6 +101,7 @@ static MySqlConnectionConfiguration configuration(
             .connectTimeout(Duration.ofSeconds(3))
             .user("root")
             .password(password)
+            .port(container.getMappedPort(MySQLContainer.MYSQL_PORT))
             .database(database)
             .createDatabaseIfNotExist(createDatabaseIfNotExist)
             .autodetectExtensions(autodetectExtensions);