diff --git a/lib/private/AppFramework/Bootstrap/ServiceFactoryRegistration.php b/lib/private/AppFramework/Bootstrap/ServiceFactoryRegistration.php
index a3195bb1b32f5..1b1c986b66733 100644
--- a/lib/private/AppFramework/Bootstrap/ServiceFactoryRegistration.php
+++ b/lib/private/AppFramework/Bootstrap/ServiceFactoryRegistration.php
@@ -8,13 +8,15 @@
  */
 namespace OC\AppFramework\Bootstrap;
 
+use OC\AppFramework\Utility\SimpleContainer;
+
 /**
  * @psalm-immutable
  */
 class ServiceFactoryRegistration extends ARegistration {
 	/**
 	 * @var callable
-	 * @psalm-var callable(\Psr\Container\ContainerInterface): mixed
+	 * @psalm-var callable(SimpleContainer): mixed
 	 */
 	private $factory;
 
@@ -36,7 +38,7 @@ public function getName(): string {
 	}
 
 	/**
-	 * @psalm-return callable(\Psr\Container\ContainerInterface): mixed
+	 * @psalm-return callable(SimpleContainer): mixed
 	 */
 	public function getFactory(): callable {
 		return $this->factory;
diff --git a/lib/private/AppFramework/Utility/SimpleContainer.php b/lib/private/AppFramework/Utility/SimpleContainer.php
index f5a2b6f84b7a9..7aade20c65891 100644
--- a/lib/private/AppFramework/Utility/SimpleContainer.php
+++ b/lib/private/AppFramework/Utility/SimpleContainer.php
@@ -37,10 +37,7 @@ public function __construct() {
 	/**
 	 * @template T
 	 * @param class-string<T>|string $id
-	 * @return T|mixed
-	 * @psalm-template S as class-string<T>|string
-	 * @psalm-param S $id
-	 * @psalm-return (S is class-string<T> ? T : mixed)
+	 * @return ($id is class-string<T> ? T : mixed)
 	 */
 	public function get(string $id): mixed {
 		return $this->query($id);
@@ -172,15 +169,6 @@ public function registerParameter($name, $value) {
 		$this[$name] = $value;
 	}
 
-	/**
-	 * The given closure is call the first time the given service is queried.
-	 * The closure has to return the instance for the given service.
-	 * Created instance will be cached in case $shared is true.
-	 *
-	 * @param string $name name of the service to register another backend for
-	 * @param Closure $closure the closure to be called on service creation
-	 * @param bool $shared
-	 */
 	public function registerService($name, Closure $closure, $shared = true) {
 		$wrapped = function () use ($closure) {
 			return $closure($this);
diff --git a/lib/private/Server.php b/lib/private/Server.php
index a0c309e5f1248..f608d3ee26d28 100644
--- a/lib/private/Server.php
+++ b/lib/private/Server.php
@@ -958,7 +958,7 @@ public function __construct(
 		$this->registerService(ILockingProvider::class, function (ContainerInterface $c) {
 			$ini = $c->get(IniGetWrapper::class);
 			$config = $c->get(IConfig::class);
-			$ttl = $config->getSystemValueInt('filelocking.ttl', max(3600, $ini->getNumeric('max_execution_time')));
+			$ttl = $config->getSystemValueInt('filelocking.ttl', max(3600, (int)($ini->getNumeric('max_execution_time') ?? 0)));
 			if ($config->getSystemValueBool('filelocking.enabled', true) || (defined('PHPUNIT_RUN') && PHPUNIT_RUN)) {
 				/** @var Factory $memcacheFactory */
 				$memcacheFactory = $c->get(ICacheFactory::class);
@@ -1212,7 +1212,9 @@ public function __construct(
 		});
 
 		$this->registerService(ISession::class, function (ContainerInterface $c) {
-			return $c->get(IUserSession::class)->getSession();
+			/** @var Session $session */
+			$session = $c->get(IUserSession::class);
+			return $session->getSession();
 		}, false);
 
 		$this->registerService(IShareHelper::class, function (ContainerInterface $c) {
diff --git a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
index 70b35228c87b5..5a9785297c2a5 100644
--- a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
+++ b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
@@ -9,6 +9,7 @@
 
 namespace OCP\AppFramework\Bootstrap;
 
+use OC\AppFramework\Utility\SimpleContainer;
 use OCP\AppFramework\IAppContainer;
 use OCP\Authentication\TwoFactorAuth\IProvider;
 use OCP\Calendar\ICalendarProvider;
@@ -68,7 +69,7 @@ public function registerDashboardWidget(string $widgetClass): void;
 	 *
 	 * @param string $name
 	 * @param callable $factory
-	 * @psalm-param callable(\Psr\Container\ContainerInterface): mixed $factory
+	 * @psalm-param callable(SimpleContainer): mixed $factory
 	 * @param bool $shared If set to true the factory result will be cached otherwise every query will call the factory again
 	 *
 	 * @return void
diff --git a/lib/public/IContainer.php b/lib/public/IContainer.php
index f125fabafe19c..9db3069f87f1d 100644
--- a/lib/public/IContainer.php
+++ b/lib/public/IContainer.php
@@ -11,6 +11,7 @@
 namespace OCP;
 
 use Closure;
+use OC\AppFramework\Utility\SimpleContainer;
 use Psr\Container\ContainerExceptionInterface;
 use Psr\Container\ContainerInterface;
 use Psr\Container\NotFoundExceptionInterface;
@@ -75,7 +76,7 @@ public function registerParameter($name, $value);
 	 * In case the parameter is false the service will be recreated on every call.
 	 *
 	 * @param string $name
-	 * @param \Closure $closure
+	 * @param \Closure(SimpleContainer): mixed $closure
 	 * @param bool $shared
 	 * @return void
 	 * @since 6.0.0