diff --git a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
index 8fe807f880..c89aa5188a 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
@@ -71,7 +71,7 @@ class MemcachedAdapterTest extends AdapterTestCase
             $this->expectExceptionMessage('constant(): Couldn\'t find constant Memcached::');
         } else {
             $this->expectException('Error');
-            $this->expectExceptionMessage('Undefined class constant \'Memcached::');
+            $this->expectExceptionMessage('Undefined constant Memcached::');
         }
 
         MemcachedAdapter::createConnection([], [$name => $value]);
diff --git a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
index 92fc7d2a87..b24289f6a6 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
@@ -81,7 +81,7 @@ class MemcachedCacheTest extends CacheTestCase
             $this->expectExceptionMessage('constant(): Couldn\'t find constant Memcached::');
         } else {
             $this->expectException('Error');
-            $this->expectExceptionMessage('Undefined class constant \'Memcached::');
+            $this->expectExceptionMessage('Undefined constant Memcached::');
         }
 
         MemcachedCache::createConnection([], [$name => $value]);