diff --git a/src/Symfony/Component/Lock/Tests/Store/ExpiringStoreTestTrait.php b/src/Symfony/Component/Lock/Tests/Store/ExpiringStoreTestTrait.php
index 9a0c5bd260..f523780ce1 100644
--- a/src/Symfony/Component/Lock/Tests/Store/ExpiringStoreTestTrait.php
+++ b/src/Symfony/Component/Lock/Tests/Store/ExpiringStoreTestTrait.php
@@ -47,10 +47,10 @@ trait ExpiringStoreTestTrait
         $store = $this->getStore();
 
         $store->save($key);
-        $store->putOffExpiration($key, $clockDelay / 1000000);
+        $store->putOffExpiration($key, 2 * $clockDelay / 1000000);
         $this->assertTrue($store->exists($key));
 
-        usleep(2 * $clockDelay);
+        usleep(3 * $clockDelay);
         $this->assertFalse($store->exists($key));
     }
 
@@ -86,10 +86,10 @@ trait ExpiringStoreTestTrait
         $store = $this->getStore();
 
         $store->save($key);
-        $store->putOffExpiration($key, $clockDelay / 1000000);
+        $store->putOffExpiration($key, 2 * $clockDelay / 1000000);
         $this->assertTrue($store->exists($key));
 
-        usleep(2 * $clockDelay);
+        usleep(3 * $clockDelay);
         $this->assertFalse($store->exists($key));
     }