diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/config/framework.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/config/framework.yml
index 1e18e44547..78bdaea026 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/config/framework.yml
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/config/framework.yml
@@ -8,7 +8,6 @@ framework:
     test: ~
     default_locale: en
     session:
-        auto_start:     true
         storage_id:     session.storage.mock_file
 
 services:
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/config/framework.yml b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/config/framework.yml
index d2b7c87b00..c14055c072 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/config/framework.yml
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/config/framework.yml
@@ -8,7 +8,6 @@ framework:
     test: ~
     default_locale: en
     session:
-        auto_start:     true
         storage_id:     session.storage.mock_file
     profiler: { only_exceptions: false }