diff --git a/src/DAMA/DoctrineTestBundle/DependencyInjection/DoctrineTestCompilerPass.php b/src/DAMA/DoctrineTestBundle/DependencyInjection/DoctrineTestCompilerPass.php
index e9c4260..cee7a00 100644
--- a/src/DAMA/DoctrineTestBundle/DependencyInjection/DoctrineTestCompilerPass.php
+++ b/src/DAMA/DoctrineTestBundle/DependencyInjection/DoctrineTestCompilerPass.php
@@ -110,6 +110,10 @@ private function registerStaticCache(
             $cache->setClass(Psr6StaticArrayCache::class);
             $cache->setArgument(0, $namespace); // make sure we have no key collisions
         } elseif (is_a($originalCacheServiceDefinition->getClass(), Cache::class, true)) {
+            @trigger_error(
+                sprintf('Configuring "%s" cache instances is deprecated since dama/doctrine-test-bundle v7.3.0 and will not be supported in 8.0. Upgrade to PSR-6 caches instead.', Cache::class),
+                E_USER_DEPRECATED
+            );
             $cache->setClass(StaticArrayCache::class);
             $cache->addMethodCall('setNamespace', [$namespace]); // make sure we have no key collisions
         } else {
diff --git a/src/DAMA/DoctrineTestBundle/Doctrine/Cache/StaticArrayCache.php b/src/DAMA/DoctrineTestBundle/Doctrine/Cache/StaticArrayCache.php
index d722384..fa8610a 100644
--- a/src/DAMA/DoctrineTestBundle/Doctrine/Cache/StaticArrayCache.php
+++ b/src/DAMA/DoctrineTestBundle/Doctrine/Cache/StaticArrayCache.php
@@ -4,6 +4,9 @@
 
 use Doctrine\Common\Cache\CacheProvider;
 
+/**
+ * @deprecated since dama/doctrine-test-bundle v7.3.0 and will be removed in v8.0.0. Use Psr6StaticArrayCache instead.
+ */
 class StaticArrayCache extends CacheProvider
 {
     /**