diff --git a/tests/backend_tests.py b/tests/backend_tests.py
index f41d8b8..cf6b6d7 100644
--- a/tests/backend_tests.py
+++ b/tests/backend_tests.py
@@ -6,20 +6,14 @@ from shutil import copyfile
 from pdc_config import TestConfig
 from app import create_app, db_mgr, db
 from app.auth.models import User
+from tests.common_db_feed import resources_to_instancedb
 
 
 class BaseTestCase(unittest.TestCase):
     def setUp(self):
         # initialise app
         self.app = create_app(TestConfig)
-
-        # copy resource  demo db to test file
-        appdir = os.path.join(os.path.dirname(os.path.abspath(__file__)), os.pardir)
-        sqlite_file_name = os.path.abspath(os.path.join(appdir, 'resources', 'lesia-btp.sqlite'))
-        if not os.path.isdir(self.app.instance_path):
-            os.mkdir(self.app.instance_path)
-        self.db_path = os.path.join(self.app.instance_path, 'test.db')
-        copyfile(sqlite_file_name, self.db_path)
+        self.db_path = resources_to_instancedb(self.app)
 
         # force db path to newly create file
         self.app.config.update(
@@ -59,4 +53,3 @@ class DbMgrTestCase(BaseTestCase):
         stacked_charges = db_mgr.charges_by_project_stacked(60)
         # Waiting for 17 periods + headers line
         self.assertEqual(18, len(stacked_charges))
-
diff --git a/tests/common_db_feed.py b/tests/common_db_feed.py
index dbe76db..09c658d 100644
--- a/tests/common_db_feed.py
+++ b/tests/common_db_feed.py
@@ -1,5 +1,20 @@
+import os
+from shutil import copyfile
+
 from app.models import Category, db, Label, Project, ProjectLabel
 
+
+def resources_to_instancedb(app):
+    # copy resource  demo db to test file
+    appdir = os.path.join(os.path.dirname(os.path.abspath(__file__)), os.pardir)
+    sqlite_file_name = os.path.abspath(os.path.join(appdir, 'resources', 'lesia-btp.sqlite'))
+    if not os.path.isdir(app.instance_path):
+        os.mkdir(app.instance_path)
+    db_path = os.path.join(app.instance_path, 'test.db')
+    copyfile(sqlite_file_name, db_path)
+    return db_path
+
+
 categorized_labels = {'pole': ['Spatial', 'Sol'], 'domaine': ['soleil-terre', 'atmosphere', 'r&t', 'géologie']}
 projects_categories = {'ChemCam': {'pole': 'Spatial', 'domaine': 'géologie'},
                        'Pilot': {'pole': 'Spatial', 'domaine': 'atmosphere'},
@@ -30,7 +45,7 @@ def feed_projects():
             n_l = db.session.query(Label).filter(Label.name == l_name).one()
             n_pc = ProjectLabel(project=n_p, category=n_c, label=n_l)
             db.session.add(n_pc)
-            
+
     db.session.commit()
 
 
--
libgit2 0.21.2