diff --git a/lib/Migration/FixCollectedAddresses.php b/lib/Migration/FixCollectedAddresses.php
index 4360e363cb..86174d783f 100644
--- a/lib/Migration/FixCollectedAddresses.php
+++ b/lib/Migration/FixCollectedAddresses.php
@@ -37,7 +37,6 @@ public function run(IOutput $output) {
 
 		$chunk = $this->mapper->getChunk();
 		while (count($chunk) > 0) {
-			$maxId = null;
 			foreach ($chunk as $address) {
 				/* @var $address CollectedAddress */
 				$maxId = $address->getId();
diff --git a/lib/Migration/Version0110Date20180825201241.php b/lib/Migration/Version0110Date20180825201241.php
index f2d7c05346..34b7c0705c 100644
--- a/lib/Migration/Version0110Date20180825201241.php
+++ b/lib/Migration/Version0110Date20180825201241.php
@@ -65,7 +65,6 @@ public function setEntityClass(string $entityClass): void {
 
 		$chunk = $collectedAdressesMapper->getChunk();
 		while (\count($chunk) > 0) {
-			$maxId = null;
 			foreach ($chunk as $address) {
 				/* @var $address CollectedAddress */
 				$maxId = $address->getId();
diff --git a/lib/SetupChecks/MailConnectionPerformance.php b/lib/SetupChecks/MailConnectionPerformance.php
index cb7caaf46d..4c560e681e 100644
--- a/lib/SetupChecks/MailConnectionPerformance.php
+++ b/lib/SetupChecks/MailConnectionPerformance.php
@@ -73,7 +73,7 @@ public function run(): SetupResult {
 					$tLogin = $this->microtime->getNumeric();
 					// time operation
 					$list = $client->listMailboxes('*');
-					$status = $client->status(key($list));
+					$client->status(key($list));
 					$tOperation = $this->microtime->getNumeric();
 					
 					$tests[$host][$accountId] = ['start' => $tStart, 'login' => $tLogin, 'operation' => $tOperation];