diff --git a/tests/Functional/PrimaryReadReplicaConnectionTest.php b/tests/Functional/PrimaryReadReplicaConnectionTest.php
index 18b0ccd0967..7c3915b2ea9 100644
--- a/tests/Functional/PrimaryReadReplicaConnectionTest.php
+++ b/tests/Functional/PrimaryReadReplicaConnectionTest.php
@@ -71,7 +71,7 @@ private function createPrimaryReadReplicaConnectionParams(bool $keepReplica = fa
     public function testInheritCharsetFromPrimary(): void
     {
         $charsets = [
-            'utf8',
+            'utf8mb4',
             'latin1',
         ];