diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
index 6bc90a478fd56..cb9df10dcfdb3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
@@ -87,7 +87,7 @@ public function testArgsAreReplaced()
 
         $this->assertInstanceOf(Reference::class, $cachePool->getArgument(0));
         $this->assertSame('foobar', (string) $cachePool->getArgument(0));
-        $this->assertSame('tQNhcV-8xa', $cachePool->getArgument(1));
+        $this->assertSame('croSeNd5bG', $cachePool->getArgument(1));
         $this->assertSame(3, $cachePool->getArgument(2));
     }
 
@@ -108,7 +108,7 @@ public function testWithNameAttribute()
 
         $this->cachePoolPass->process($container);
 
-        $this->assertSame('+naTpPa4Sm', $cachePool->getArgument(1));
+        $this->assertSame('-Tv17ISg7e', $cachePool->getArgument(1));
     }
 
     public function testThrowsExceptionWhenCachePoolTagHasUnknownAttributes()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
index b65ab9e011f28..efcecb3cf95a5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
@@ -1457,11 +1457,11 @@ public function testCachePoolServices()
                 (new ChildDefinition('cache.adapter.array'))
                     ->replaceArgument(0, 12),
                 (new ChildDefinition('cache.adapter.filesystem'))
-                    ->replaceArgument(0, 'xctxZ1lyiH')
+                    ->replaceArgument(0, 'kByObfHfz6')
                     ->replaceArgument(1, 12),
                 (new ChildDefinition('cache.adapter.redis'))
                     ->replaceArgument(0, new Reference('.cache_connection.kYdiLgf'))
-                    ->replaceArgument(1, 'xctxZ1lyiH')
+                    ->replaceArgument(1, 'kByObfHfz6')
                     ->replaceArgument(2, 12),
             ],
             12,
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
index f52d0271e4117..9e14a93a12d6e 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
@@ -52,8 +52,8 @@ public function process(ContainerBuilder $container)
             $seed = '.'.$container->getParameterBag()->resolveValue($container->getParameter('cache.prefix.seed'));
         } else {
             $seed = '_'.$container->getParameter('kernel.project_dir');
+            $seed .= '.'.$container->getParameter('kernel.container_class');
         }
-        $seed .= '.'.$container->getParameter('kernel.container_class');
 
         $allPools = [];
         $clearers = [];
diff --git a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
index 20701adcb4507..94b8b43c42027 100644
--- a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
+++ b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
@@ -135,7 +135,7 @@ public function testArgsAreReplaced()
 
         $this->assertInstanceOf(Reference::class, $cachePool->getArgument(0));
         $this->assertSame('foobar', (string) $cachePool->getArgument(0));
-        $this->assertSame('tQNhcV-8xa', $cachePool->getArgument(1));
+        $this->assertSame('croSeNd5bG', $cachePool->getArgument(1));
         $this->assertSame(3, $cachePool->getArgument(2));
     }
 
@@ -156,7 +156,7 @@ public function testWithNameAttribute()
 
         $this->cachePoolPass->process($container);
 
-        $this->assertSame('+naTpPa4Sm', $cachePool->getArgument(1));
+        $this->assertSame('-Tv17ISg7e', $cachePool->getArgument(1));
     }
 
     public function testThrowsExceptionWhenCachePoolTagHasUnknownAttributes()