diff --git a/src/HttpApiMockContext.php b/src/HttpApiMockContext.php
index de9b643..2f53723 100644
--- a/src/HttpApiMockContext.php
+++ b/src/HttpApiMockContext.php
@@ -107,6 +107,7 @@ public function queLeProxyEffectueUneRequeteSurEtRenvoieStatusHTTPAvecLImageCont
     public function queLeProxyEffectueUneRequeteSurAvecLeCorpsEtRenvoieLeStatusHTTP($proxy_name, $method, $url, $req_body, $status_code, $body = null)
     {
         $response = self::prepareMockResponse($status_code, $body);
+        $req_body = self::prepareReqBody($req_body);
 
         $method_name = strtolower($method) . 'Request';
 
@@ -121,6 +122,16 @@ public function queLeProxyEffectueUneRequeteSurAvecLeCorpsEtRenvoieLeStatusHTTP(
         self::$phiremock->createExpectation($expectation);
     }
 
+    private function prepareReqBody($req_body) {
+        $body = trim(file_get_contents($this->requests_path . $req_body));
+
+        if (!$body) {
+            throw new \Exception("File not found : {$this->requests_path}${body}");
+        }
+
+        return $body;
+    }
+
     private function prepareMockResponse($status_code, $body)
     {
         $response = \Mcustiel\Phiremock\Client\Utils\Respond::withStatusCode(intval($status_code))->andHeader('Content-Type', 'application/json');