diff --git a/README.md b/README.md
index 868d52d..7d2932f 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,8 @@
 npm install
 ```
 
+🚧 **Note importante** : la variable d'environnement `$CORPUSES_ROOT` doit être définie. Elle correspond au chemin du répertoire dans lequel seront stockés les fichiers moissonnés.
+
 ### Vérification du fonctionnement ###
 
 Commande d'exécution des tests unitaires :
@@ -105,7 +107,7 @@
 ```
 {
     "halApi":"",        // L'adresse url de l'api Hal
-    "max_retry":2       // Nombre des retries en cas d'échec lors de l'interrogation de l'api HAL
+    "maxRetry":2       // Nombre des retries en cas d'échec lors de l'interrogation de l'api HAL
 }
 ```
 
@@ -116,3 +118,4 @@
 | FolderExistError  | Harvest folder already exist.                         |
 | FetchError        | API-HAL request error.                                |
 | NoResultFound     | No result found to harvest.                           |
+| MissingEnvironmentVariable | A required environment variable must be set  |
\ No newline at end of file
diff --git a/config/config.js b/config/config.js
index 0ff8737..6716709 100644
--- a/config/config.js
+++ b/config/config.js
@@ -1,4 +1,4 @@
 module.exports = {
   halApi: 'https://api.archives-ouvertes.fr/search?',
-  max_retry: 2
+  maxRetry: 2
 };
diff --git a/index.js b/index.js
index a3313e8..d3643d5 100644
--- a/index.js
+++ b/index.js
@@ -2,6 +2,7 @@
 
 const fetch = require('node-fetch');
 const fs = require('graceful-fs');
+const path= require('path');
 const xmlFormatter = require('xml-formatter');
 
 const utils = require('./lib/utils');
@@ -23,12 +24,23 @@
   const dateBegin = docObject.halHarvestModifiedDateFrom;
   const dateEnd = docObject.halHarvestModifiedDateTo;
 
-  harvestPath = utils.getHarvestPath([
+  if (!process.env.CORPUSES_ROOT) {
+    const err = {
+      code: 'MissingEnvironmentVariable',
+      _errMsg: 'Environment variable $CORPUSES_ROOT must be set'
+    };
+    docObject.error = err;
+    return cb(err);
+  }
+
+  const folderName = [
     docObject.corpusName,
     utils.getDateYYYYMMDD(new Date(dateBegin)),
     'to',
-    utils.getDateYYYYMMDD(new Date(dateEnd))].filter(Boolean).join('-')
-  );
+    utils.getDateYYYYMMDD(new Date(dateEnd))
+  ].filter(Boolean).join('-');
+  
+  harvestPath = path.join(process.env.CORPUSES_ROOT, 'hal', folderName);
 
   if (fs.existsSync(harvestPath)) {
     const err = {
diff --git a/lib/utils.js b/lib/utils.js
index 6f7e6de..eed2bd4 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -72,10 +72,6 @@
   return `${urlBase}/?${sp.toString()}`;
 };
 
-utils.getHarvestPath = function (path) {
-  return (process.env.CORPUSES_ROOT ? process.env.CORPUSES_ROOT + '/hal/' + path : 'hal/' + path);
-};
-
 utils.getProxyAgent = function () {
   // Get proxy env vars
   const httpProxy = process.env.HTTP_PROXY ? process.env.HTTP_PROXY : process.env.http_proxy;
diff --git a/test/data/.gitkeep b/test/data/.gitkeep
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/data/.gitkeep
diff --git a/test/run.js b/test/run.js
index 57d5896..39db83e 100644
--- a/test/run.js
+++ b/test/run.js
@@ -3,7 +3,7 @@
 const pkg = require('../package.json');
 const fs = require('graceful-fs');
 const business = require('../index.js');
-const utils = require('../lib/utils.js');
+const path = require('path');
 const chai = require('chai');
 const expect = chai.expect;
 
@@ -18,10 +18,12 @@
   };
 }
 
+process.env.CORPUSES_ROOT = path.join(__dirname, 'data');
+
 let harvestPath;
 describe(pkg.name + '/index.js', function () {
   before(function () {
-    harvestPath = utils.getHarvestPath('hal-20211121-to-20211121');
+    harvestPath = path.join(process.env.CORPUSES_ROOT, 'hal', 'hal-20211121-to-20211121');
     if (fs.existsSync(harvestPath)) {
       fs.rmdirSync(harvestPath, { recursive: true });
     }
@@ -46,7 +48,7 @@
       const docObject = initDocObject();
       docObject.halHarvestModifiedDateFrom = '2021-10-20T00:00:00.000Z';
       docObject.halHarvestModifiedDateTo = '2021-10-21T00:00:00.000Z';
-      const harvestPath = utils.getHarvestPath('hal-20211020-to-20211021');
+      const harvestPath = path.join(process.env.CORPUSES_ROOT, 'hal', 'hal-20211020-to-20211021');
       fs.mkdirSync(harvestPath, { recursive: true });
       business.doTheJob(docObject, function (err) {
         // harvest folder already exist