diff --git a/src/Core/Cache/Factory/Cache.php b/src/Core/Cache/Factory/Cache.php
index 02cdb1a79e..000233df7f 100644
--- a/src/Core/Cache/Factory/Cache.php
+++ b/src/Core/Cache/Factory/Cache.php
@@ -69,7 +69,7 @@ class Cache
 	 */
 	public function createDistributed(string $type = null): ICanCache
 	{
-		if ($type === Type\APCuCache::$NAME) {
+		if ($type === Type\APCuCache::NAME) {
 			throw new InvalidCacheDriverException('apcu doesn\'t support distributed caching.');
 		}
 
diff --git a/src/Core/Cache/Type/APCuCache.php b/src/Core/Cache/Type/APCuCache.php
index 02b2d0fbdb..f35815c15a 100644
--- a/src/Core/Cache/Type/APCuCache.php
+++ b/src/Core/Cache/Type/APCuCache.php
@@ -30,7 +30,7 @@ use Friendica\Core\Cache\Exception\InvalidCacheDriverException;
  */
 class APCuCache extends AbstractCache implements ICanCacheInMemory
 {
-	public static $NAME = 'apcu';
+	const NAME = 'apcu';
 
 	use CompareSetTrait;
 	use CompareDeleteTrait;
diff --git a/src/Core/Cache/Type/AbstractCache.php b/src/Core/Cache/Type/AbstractCache.php
index 36e301ad20..211f28b9a6 100644
--- a/src/Core/Cache/Type/AbstractCache.php
+++ b/src/Core/Cache/Type/AbstractCache.php
@@ -28,7 +28,7 @@ use Friendica\Core\Cache\Capability\ICanCache;
  */
 abstract class AbstractCache implements ICanCache
 {
-	public static $NAME = '';
+	const NAME = '';
 
 	/**
 	 * @var string The hostname
@@ -111,6 +111,6 @@ abstract class AbstractCache implements ICanCache
 	/** {@inheritDoc} */
 	public function getName(): string
 	{
-		return static::$NAME;
+		return static::NAME;
 	}
 }
diff --git a/src/Core/Cache/Type/ArrayCache.php b/src/Core/Cache/Type/ArrayCache.php
index ad87eaf23a..34246afffa 100644
--- a/src/Core/Cache/Type/ArrayCache.php
+++ b/src/Core/Cache/Type/ArrayCache.php
@@ -29,7 +29,7 @@ use Friendica\Core\Cache\Enum;
  */
 class ArrayCache extends AbstractCache implements ICanCacheInMemory
 {
-	public static $NAME = 'array';
+	const NAME = 'array';
 
 	use CompareDeleteTrait;
 
diff --git a/src/Core/Cache/Type/DatabaseCache.php b/src/Core/Cache/Type/DatabaseCache.php
index 18541e0d2b..4959d6a751 100644
--- a/src/Core/Cache/Type/DatabaseCache.php
+++ b/src/Core/Cache/Type/DatabaseCache.php
@@ -32,7 +32,7 @@ use Friendica\Util\DateTimeFormat;
  */
 class DatabaseCache extends AbstractCache implements ICanCache
 {
-	public static $NAME = 'database';
+	const NAME = 'database';
 
 	/**
 	 * @var Database
diff --git a/src/Core/Cache/Type/MemcacheCache.php b/src/Core/Cache/Type/MemcacheCache.php
index 09394a1dd3..fccaff6c00 100644
--- a/src/Core/Cache/Type/MemcacheCache.php
+++ b/src/Core/Cache/Type/MemcacheCache.php
@@ -33,7 +33,7 @@ use Memcache;
  */
 class MemcacheCache extends AbstractCache implements ICanCacheInMemory
 {
-	static $NAME = 'memcached';
+	const NAME = 'memcached';
 
 	use CompareSetTrait;
 	use CompareDeleteTrait;
diff --git a/src/Core/Cache/Type/MemcachedCache.php b/src/Core/Cache/Type/MemcachedCache.php
index 45a7a0f1c1..160c5a16f4 100644
--- a/src/Core/Cache/Type/MemcachedCache.php
+++ b/src/Core/Cache/Type/MemcachedCache.php
@@ -34,7 +34,7 @@ use Psr\Log\LoggerInterface;
  */
 class MemcachedCache extends AbstractCache implements ICanCacheInMemory
 {
-	static $NAME = 'memcached';
+	const NAME = 'memcached';
 
 	use CompareSetTrait;
 	use CompareDeleteTrait;
diff --git a/src/Core/Cache/Type/RedisCache.php b/src/Core/Cache/Type/RedisCache.php
index 36c60a12c1..be2a7ff080 100644
--- a/src/Core/Cache/Type/RedisCache.php
+++ b/src/Core/Cache/Type/RedisCache.php
@@ -33,7 +33,7 @@ use Redis;
  */
 class RedisCache extends AbstractCache implements ICanCacheInMemory
 {
-	public static $NAME = 'redis';
+	const NAME = 'redis';
 
 	/**
 	 * @var Redis
diff --git a/tests/src/Core/Cache/CacheTest.php b/tests/src/Core/Cache/CacheTest.php
index dbcc56e228..775a29374c 100644
--- a/tests/src/Core/Cache/CacheTest.php
+++ b/tests/src/Core/Cache/CacheTest.php
@@ -250,8 +250,8 @@ abstract class CacheTest extends MockedTest
 
 	public function testGetName()
 	{
-		if (property_exists($this->instance, '$NAME')) {
-			self::assertEquals($this->instance::$NAME, $this->instance->getName());
+		if (defined(get_class($this->instance) . '::NAME')) {
+			self::assertEquals($this->instance::NAME, $this->instance->getName());
 		} else {
 			self::expectNotToPerformAssertions();
 		}