diff --git a/sources/lib/Tester/FoundationSessionAtoum.php b/sources/lib/Tester/FoundationSessionAtoum.php
index <HASH>..<HASH> 100644
--- a/sources/lib/Tester/FoundationSessionAtoum.php
+++ b/sources/lib/Tester/FoundationSessionAtoum.php
@@ -28,7 +28,7 @@ use PommProject\Foundation\SessionBuilder;
  */
 abstract class FoundationSessionAtoum extends VanillaSessionAtoum
 {
-    protected function createSessionBuilder($configuration)
+    protected function createSessionBuilder(array $configuration)
     {
         return new SessionBuilder($configuration);
     }
diff --git a/sources/lib/Tester/VanillaSessionAtoum.php b/sources/lib/Tester/VanillaSessionAtoum.php
index <HASH>..<HASH> 100644
--- a/sources/lib/Tester/VanillaSessionAtoum.php
+++ b/sources/lib/Tester/VanillaSessionAtoum.php
@@ -77,7 +77,7 @@ abstract class VanillaSessionAtoum extends Atoum
      * @param  array $configuration
      * @return SessionBuilder
      */
-    protected function createSessionBuilder($configuration)
+    protected function createSessionBuilder(array $configuration)
     {
         return new SessionBuilder($configuration);
     }
Session builder needs array in SessionAtoum classes.