diff --git a/tests/DataStorage/Cache/Connection/MemCachedTest.php b/tests/DataStorage/Cache/Connection/MemCachedTest.php
index 91d26b550..b32910f19 100644
--- a/tests/DataStorage/Cache/Connection/MemCachedTest.php
+++ b/tests/DataStorage/Cache/Connection/MemCachedTest.php
@@ -39,6 +39,11 @@ class MemCachedTest extends \PHPUnit\Framework\TestCase
         $this->cache = new MemCached($GLOBALS['CONFIG']['cache']['memcached']);
     }
 
+    protected function tearDown(): void
+    {
+        $this->cache->flushAll();
+    }
+
     /**
      * @testdox The memcached connection has the expected default values after initialization
      * @covers phpOMS\DataStorage\Cache\Connection\MemCached<extended>
diff --git a/tests/DataStorage/Cache/Connection/RedisCacheTest.php b/tests/DataStorage/Cache/Connection/RedisCacheTest.php
index 7dc393cde..9d11dcca2 100644
--- a/tests/DataStorage/Cache/Connection/RedisCacheTest.php
+++ b/tests/DataStorage/Cache/Connection/RedisCacheTest.php
@@ -39,6 +39,11 @@ class RedisCacheTest extends \PHPUnit\Framework\TestCase
         $this->cache = new RedisCache($GLOBALS['CONFIG']['cache']['redis']);
     }
 
+    protected function tearDown(): void
+    {
+        $this->cache->flushAll();
+    }
+
     /**
      * @testdox The redis cache connection has the expected default values after initialization
      * @covers phpOMS\DataStorage\Cache\Connection\RedisCache<extended>