diff --git a/.gitignore b/.gitignore
index c65f5612d12e1e54466b6173c01d30abba6e380b..abc52eaa38d029223acedaf0b2c9720ecb564bcc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 # editors configurations
 travo.code-workspace
 .idea
+code/artifacts.zip
+forkedRepositories/froidevaux.pierre_thomas/activity.json
 .vscode/settings.json
 *~
 
@@ -14,6 +16,9 @@ forkedRepositories/*
 .gitlab-ci-local*
 code/artifacts.zip
 
+# local git tests
+.gitlab-ci-local*
+
 # local rendered documentation
 docs/build
 .spyproject
diff --git a/travo/jupyter_course.py b/travo/jupyter_course.py
index 81575cdf76d4068292b6f8e629579b9e7a2a9e0e..89aafc49b95e9fe4aa94f16d3fe1f5753d39db80 100644
--- a/travo/jupyter_course.py
+++ b/travo/jupyter_course.py
@@ -26,9 +26,9 @@ from .utils import run
 from .nbgrader_utils import (
     remove_submission_gradebook,
     Gradebook,
+    merge_assignment_gradebook,
 )
 
-
 if TYPE_CHECKING:
     from . import dashboards
 
@@ -267,13 +267,26 @@ class JupyterCourse(Course):
         ipynbs = self.convert_from_md_to_ipynb(path=source_path)
         release_path = assignment.release_path()
         with tempfile.TemporaryDirectory() as tmpdirname:
-            gitdir = os.path.join(release_path, ".git")
-            tmpgitdir = os.path.join(tmpdirname, ".git")
             db = os.path.join(release_path, ".gradebook.db")
-            self.log.info("Sauvegarde de l'historique git")
-            shutil.move(gitdir, tmpgitdir)
+            gitdir = os.path.join(release_path, ".git")
+            is_git = os.path.exists(gitdir)
+            if is_git:
+                tmpgitdir = os.path.join(tmpdirname, ".git")
+                self.log.info("Sauvegarde de l'historique git")
+                shutil.move(gitdir, tmpgitdir)
             assignment_basename = os.path.basename(assignment_name)
             try:
+                run(
+                    [
+                        "nbgrader",
+                        "generate_assignment",
+                        "--force",
+                        f"--CourseDirectory.source_directory={self.source_directory}",
+                        f"--CourseDirectory.release_directory={self.release_directory}",
+                        assignment_basename,
+                        "--db='sqlite:///.gradebook.db'",
+                    ]
+                )
                 run(
                     [
                         "nbgrader",
@@ -391,7 +404,6 @@ class JupyterCourse(Course):
 
             course.autograde("Assignment1", tag="firstname.lastname")
         """
-        run(["nbgrader", "--version"])
         assignment = os.path.basename(assignment_name)
         nbgrader_config = self.get_nbgrader_config()
         self.nbgrader_update_student_list(tag=tag)
@@ -960,7 +972,6 @@ class JupyterCourse(Course):
         from nbgrader.api import Gradebook, MissingEntry
         from .nbgrader_utils import (
             merge_submission_gradebook,
-            merge_assignment_gradebook,
         )
 
         target = Gradebook("sqlite:///.gradebook.db")