diff --git a/lib/Data.php b/lib/Data.php
index face8b540..11ecf8ed2 100755
--- a/lib/Data.php
+++ b/lib/Data.php
@@ -24,7 +24,7 @@
 
 namespace OCA\Activity;
 
-use Doctrine\DBAL\Platforms\MySqlPlatform;
+use Doctrine\DBAL\Platforms\MySQLPlatform;
 use OCA\Activity\Filter\AllFilter;
 use OCP\Activity\IEvent;
 use OCP\Activity\IExtension;
@@ -32,7 +32,6 @@
 use OCP\Activity\IManager;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
-use OCP\IL10N;
 
 /**
  * @brief Class for managing the data in the activities
@@ -371,7 +370,7 @@ public function deleteActivities($conditions) {
 
 		// Add galera safe delete chunking if using mysql
 		// Stops us hitting wsrep_max_ws_rows when large row counts are deleted
-		if ($this->connection->getDatabasePlatform() instanceof MySqlPlatform) {
+		if ($this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
 			// Then use chunked delete
 			$max = 100000;
 			$query = $this->connection->prepare(
diff --git a/tests/DataDeleteActivitiesTest.php b/tests/DataDeleteActivitiesTest.php
index 06bcfd36a..851700758 100644
--- a/tests/DataDeleteActivitiesTest.php
+++ b/tests/DataDeleteActivitiesTest.php
@@ -23,12 +23,12 @@
 
 namespace OCA\Activity\Tests;
 
-use Doctrine\DBAL\Driver\Statement;
-use Doctrine\DBAL\Platforms\MySqlPlatform;
+use Doctrine\DBAL\Platforms\MySQLPlatform;
 use Doctrine\DBAL\Platforms\SqlitePlatform;
 use OCA\Activity\BackgroundJob\ExpireActivities;
 use OCA\Activity\Data;
 use OCP\Activity\IExtension;
+use OCP\DB\IPreparedStatement;
 use OCP\IConfig;
 use OCP\IUserSession;
 use OCP\Activity\IManager;
@@ -121,7 +121,7 @@ protected function assertUserActivities(array $expected) {
 		$this->assertTableKeys($expected, $query, 'affecteduser');
 	}
 
-	protected function assertTableKeys(array $expected, Statement $query, string $keyName): void {
+	protected function assertTableKeys(array $expected, IPreparedStatement $query, string $keyName): void {
 		$query->execute();
 
 		$users = [];
@@ -144,7 +144,7 @@ public function testChunkingDeleteNotUsedWhenNotOnMysql(): void {
 		$platform = $this->createMock(SqlitePlatform::class);
 		$connection->expects($this->once())->method('getDatabasePlatform')->willReturn($platform);
 
-		$statement = $this->createMock(Statement::class);
+		$statement = $this->createMock(IPreparedStatement::class);
 		// Wont chunk
 		$statement->expects($this->exactly(0))->method('rowCount')->willReturnOnConsecutiveCalls(100000, 50);
 		$connection->expects($this->once())->method('prepare')->willReturn($statement);
@@ -161,10 +161,10 @@ public function testDeleteActivitiesIsChunkedOnMysql(): void {
 		$timelimit = time() - $ttl;
 		$activityManager = $this->createMock(\OCP\Activity\IManager::class);
 		$connection = $this->createMock(\OCP\IDBConnection::class);
-		$platform = $this->createMock(MySqlPlatform::class);
+		$platform = $this->createMock(MySQLPlatform::class);
 		$connection->expects($this->once())->method('getDatabasePlatform')->willReturn($platform);
 
-		$statement = $this->createMock(Statement::class);
+		$statement = $this->createMock(IPreparedStatement::class);
 		// Will chunk
 		$statement->expects($this->exactly(2))->method('rowCount')->willReturnOnConsecutiveCalls(100000, 50);
 		$connection->expects($this->once())->method('prepare')->willReturn($statement);
diff --git a/tests/HooksDeleteUserTest.php b/tests/HooksDeleteUserTest.php
index 001c35937..29ea294c6 100644
--- a/tests/HooksDeleteUserTest.php
+++ b/tests/HooksDeleteUserTest.php
@@ -23,11 +23,10 @@
 
 namespace OCA\Activity\Tests;
 
-use Doctrine\DBAL\Driver\Statement;
 use OCA\Activity\Data;
 use OCA\Activity\Hooks;
 use OCP\Activity\IExtension;
-use OCP\IUserSession;
+use OCP\DB\IPreparedStatement;
 use OCP\Activity\IManager;
 
 /**
@@ -79,8 +78,7 @@ protected function setUp(): void {
 	protected function tearDown(): void {
 		$data = new Data(
 			$this->createMock(IManager::class),
-			\OC::$server->getDatabaseConnection(),
-			$this->createMock(IUserSession::class)
+			\OC::$server->getDatabaseConnection()
 		);
 		$data->deleteActivities(array(
 			'type' => 'test',
@@ -109,7 +107,7 @@ protected function assertUserMailQueue(array $expected): void {
 		$this->assertTableKeys($expected, $query, 'amq_affecteduser');
 	}
 
-	protected function assertTableKeys(array $expected, Statement $query, string $keyName): void {
+	protected function assertTableKeys(array $expected, IPreparedStatement $query, string $keyName): void {
 		$query->execute();
 
 		$users = array();