diff --git a/docker-compose.yml b/docker-compose.yml
index 6dcc7ec2f6..62a322db81 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,7 +15,7 @@ services:
     ports:
       # Useful to connect a local MySQL client / GUI
       - 127.0.0.1:13306:3306
-    command: --max-connections=1000 --max-allowed-packet=512M
+    command: --max-connections=1000 --max-allowed-packet=512M --innodb_snapshot_isolation=OFF
     volumes:
       - /var/lib/mysql
   domjudge:
diff --git a/webapp/src/Controller/Jury/JuryMiscController.php b/webapp/src/Controller/Jury/JuryMiscController.php
index e664c4b9dd..13fbd55696 100644
--- a/webapp/src/Controller/Jury/JuryMiscController.php
+++ b/webapp/src/Controller/Jury/JuryMiscController.php
@@ -50,9 +50,9 @@ public function __construct(
     public function indexAction(ConfigurationService $config): Response
     {
         if ($this->isGranted('ROLE_ADMIN')) {
-            $innodbSnapshotIsolation = $this->em->getConnection()->query('SHOW VARIABLES LIKE "innodb_snapshot_isolation"')->fetchOne();
-            if ($innodbSnapshotIsolation) {
-                $this->addFlash('danger', 'InnoDB snapshot isolation is enabled. Set --innodb_snapshot_isolation=false in your MariaDB configuration. See https://github.com/DOMjudge/domjudge/issues/2848 for more information.');
+            $innodbSnapshotIsolation = $this->em->getConnection()->query('SHOW VARIABLES LIKE "innodb_snapshot_isolation"')->fetchAssociative();
+            if ($innodbSnapshotIsolation && $innodbSnapshotIsolation['Value'] === 'ON') {
+                $this->addFlash('danger', 'InnoDB snapshot isolation is enabled. Set --innodb_snapshot_isolation=OFF in your MariaDB configuration. See https://github.com/DOMjudge/domjudge/issues/2848 for more information.');
             }
         }
 
diff --git a/webapp/src/Service/CheckConfigService.php b/webapp/src/Service/CheckConfigService.php
index 6de3f32837..14c8f9b652 100644
--- a/webapp/src/Service/CheckConfigService.php
+++ b/webapp/src/Service/CheckConfigService.php
@@ -255,9 +255,9 @@ public function checkMysqlSettings(): ConfigCheckItem
             $desc .= sprintf("max_allowed_packet is set to %s.\n", Utils::printsize((int)$vars['max_allowed_packet']));
         }
 
-        if ($vars['innodb_snapshot_isolation'] === 'true') {
+        if ($vars['innodb_snapshot_isolation'] === 'ON') {
             $result = 'E';
-            $desc .= 'InnoDB snapshot isolation is enabled. Set --innodb_snapshot_isolation=false in your MariaDB configuration. See https://github.com/DOMjudge/domjudge/issues/2848 for more information.';
+            $desc .= 'InnoDB snapshot isolation is enabled. Set --innodb_snapshot_isolation=OFF in your MariaDB configuration. See https://github.com/DOMjudge/domjudge/issues/2848 for more information.';
         } else {
             $desc .= "InnoDB snapshot isolation is not enabled.\n";
         }