diff --git a/src/Service/ParticipantService.php b/src/Service/ParticipantService.php
index c0218fe..89a4342 100644
--- a/src/Service/ParticipantService.php
+++ b/src/Service/ParticipantService.php
@@ -160,6 +160,11 @@ class ParticipantService
      */
     public function getParticipant($surveyId, $email)
     {
+        /*
+         * I have to get all participants of survey to avoid problem when participants exist but are not loaded
+         */
+        $this->getSurveyParticipants($surveyId);
+
         return $this
             ->allParticipants
             ->getParticipantOfSurvey($surveyId, $email);
diff --git a/tests/Service/ParticipantServiceTest.php b/tests/Service/ParticipantServiceTest.php
index 4a41c39..eb73ecc 100644
--- a/tests/Service/ParticipantServiceTest.php
+++ b/tests/Service/ParticipantServiceTest.php
@@ -125,7 +125,7 @@ class ParticipantServiceTest extends BaseTestCase
 
     public function testGetParticipant()
     {
-        $rpcClientManager = $this->getJsonRpcClientManager(0);
+        $rpcClientManager = $this->getJsonRpcClientManager(1);
         $sessionManager = $this->getSessionManager();
 
         $this->createServiceWithoutParticipants($rpcClientManager, $sessionManager);