diff --git a/solution/src/test/java/com/merikan/testcontainers/todo/test/AbstractIntegrationTest.java b/solution/src/test/java/com/merikan/testcontainers/todo/test/AbstractIntegrationTest.java
index 3c2c272..d550ffa 100644
--- a/solution/src/test/java/com/merikan/testcontainers/todo/test/AbstractIntegrationTest.java
+++ b/solution/src/test/java/com/merikan/testcontainers/todo/test/AbstractIntegrationTest.java
@@ -20,10 +20,10 @@
 public abstract class AbstractIntegrationTest {
 
     static final MariaDBContainer mariadb;
-    private static GenericContainer redis;
 
     static {
-        mariadb = new MariaDBContainer("mariadb:10.5.5");
+        mariadb = (MariaDBContainer) new MariaDBContainer("mariadb:10.5.5")
+            .withCommand("--character-set-server=utf8mb4", "--collation-server=utf8mb4_unicode_ci");
         mariadb.start();
     }