diff --git a/src/Core/Cache/MemcacheCacheDriver.php b/src/Core/Cache/MemcacheCacheDriver.php
index bff543b54..5fe9225e7 100644
--- a/src/Core/Cache/MemcacheCacheDriver.php
+++ b/src/Core/Cache/MemcacheCacheDriver.php
@@ -4,6 +4,9 @@ namespace Friendica\Core\Cache;
 
 use Friendica\Core\Cache;
 
+use Exception;
+use Memcache;
+
 /**
  * Memcache Cache Driver
  *
@@ -15,20 +18,20 @@ class MemcacheCacheDriver extends AbstractCacheDriver implements IMemoryCacheDri
 	use TraitCompareDelete;
 
 	/**
-	 * @var \Memcache
+	 * @var Memcache
 	 */
 	private $memcache;
 
 	public function __construct($memcache_host, $memcache_port)
 	{
 		if (!class_exists('Memcache', false)) {
-			throw new \Exception('Memcache class isn\'t available');
+			throw new Exception('Memcache class isn\'t available');
 		}
 
-		$this->memcache = new \Memcache();
+		$this->memcache = new Memcache();
 
 		if (!$this->memcache->connect($memcache_host, $memcache_port)) {
-			throw new \Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
+			throw new Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
 		}
 	}
 
diff --git a/src/Core/Cache/MemcachedCacheDriver.php b/src/Core/Cache/MemcachedCacheDriver.php
index d4aab15c9..870219854 100644
--- a/src/Core/Cache/MemcachedCacheDriver.php
+++ b/src/Core/Cache/MemcachedCacheDriver.php
@@ -4,6 +4,9 @@ namespace Friendica\Core\Cache;
 
 use Friendica\Core\Cache;
 
+use Exception;
+use Memcached;
+
 /**
  * Memcached Cache Driver
  *
@@ -22,15 +25,15 @@ class MemcachedCacheDriver extends AbstractCacheDriver implements IMemoryCacheDr
 	public function __construct(array $memcached_hosts)
 	{
 		if (!class_exists('Memcached', false)) {
-			throw new \Exception('Memcached class isn\'t available');
+			throw new Exception('Memcached class isn\'t available');
 		}
 
-		$this->memcached = new \Memcached();
+		$this->memcached = new Memcached();
 
 		$this->memcached->addServers($memcached_hosts);
 
 		if (count($this->memcached->getServerList()) == 0) {
-			throw new \Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
+			throw new Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
 		}
 	}
 
@@ -42,7 +45,7 @@ class MemcachedCacheDriver extends AbstractCacheDriver implements IMemoryCacheDr
 		// We fetch with the hostname as key to avoid problems with other applications
 		$value = $this->memcached->get($cachekey);
 
-		if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {
+		if ($this->memcached->getResultCode() === Memcached::RES_SUCCESS) {
 			$return = $value;
 		}
 
diff --git a/src/Core/Cache/RedisCacheDriver.php b/src/Core/Cache/RedisCacheDriver.php
index 20bdb75d2..fff079e78 100644
--- a/src/Core/Cache/RedisCacheDriver.php
+++ b/src/Core/Cache/RedisCacheDriver.php
@@ -4,6 +4,9 @@ namespace Friendica\Core\Cache;
 
 use Friendica\Core\Cache;
 
+use Exception;
+use Redis;
+
 /**
  * Redis Cache Driver. This driver is based on Memcache driver
  *
@@ -13,20 +16,20 @@ use Friendica\Core\Cache;
 class RedisCacheDriver extends AbstractCacheDriver implements IMemoryCacheDriver
 {
 	/**
-	 * @var \Redis
+	 * @var Redis
 	 */
 	private $redis;
 
 	public function __construct($redis_host, $redis_port)
 	{
 		if (!class_exists('Redis', false)) {
-			throw new \Exception('Redis class isn\'t available');
+			throw new Exception('Redis class isn\'t available');
 		}
 
-		$this->redis = new \Redis();
+		$this->redis = new Redis();
 
 		if (!$this->redis->connect($redis_host, $redis_port)) {
-			throw new \Exception('Expected Redis server at ' . $redis_host . ':' . $redis_port . ' isn\'t available');
+			throw new Exception('Expected Redis server at ' . $redis_host . ':' . $redis_port . ' isn\'t available');
 		}
 	}