diff --git a/app/scodoc/sco_prepajury.py b/app/scodoc/sco_prepajury.py
index 369c11a8d..0c552d6fc 100644
--- a/app/scodoc/sco_prepajury.py
+++ b/app/scodoc/sco_prepajury.py
@@ -129,12 +129,7 @@ def feuille_preparation_jury(formsemestre_id):
         # parcours:
         parcours[etud.id] = Se.get_cursus_descr()
         # groupe principal (td)
-        groupestd[etud.id] = ""
-        for s in Se.etud["sems"]:
-            if s["formsemestre_id"] == formsemestre_id:
-                groupestd[etud.id] = etud_groups.get(etud.id, {}).get(
-                    main_partition_id, ""
-                )
+        groupestd[etud.id] = etud_groups.get(etud.id, {}).get(main_partition_id, "")
         # absences:
         _, nbabsjust[etud.id], nbabs[etud.id] = sco_assiduites.get_assiduites_count(
             etud.id, sem
diff --git a/tests/unit/test_but_jury.py b/tests/unit/test_but_jury.py
index ca61d2c60..3a4284b7a 100644
--- a/tests/unit/test_but_jury.py
+++ b/tests/unit/test_but_jury.py
@@ -25,18 +25,21 @@ from tests.unit import yaml_setup, yaml_setup_but
 import app
 from app.but.jury_but_validation_auto import formsemestre_validation_auto_but
 from app.models import Formation, FormSemestre, UniteEns
+from app.scodoc import sco_prepajury
 from config import TestConfig
 
 DEPT = TestConfig.DEPT_TEST
 
 
-def setup_and_test_jurys(yaml_filename: str):
-    "Charge YAML et lance test jury BUT"
+def setup_and_test_jurys(yaml_filename: str) -> FormSemestre | None:
+    """Charge YAML et lance test jury BUT.
+    Rennvoie le dernier formsemestre s'il y en a un.
+    """
     app.set_sco_dept(DEPT)
     # Construit la base de test GB une seule fois
     # puis lance les tests de jury
     doc, formation, formsemestre_titres = yaml_setup.setup_from_yaml(yaml_filename)
-
+    formsemestre = None
     for formsemestre_titre in formsemestre_titres:
         formsemestre = yaml_setup.create_formsemestre_with_etuds(
             doc, formation, formsemestre_titre
@@ -48,6 +51,7 @@ def setup_and_test_jurys(yaml_filename: str):
         # et vérification des résultats attendus:
         formsemestre_validation_auto_but(formsemestre, only_adm=False)
         yaml_setup_but.but_test_jury(formsemestre, doc)
+    return formsemestre
 
 
 @pytest.mark.slow
@@ -59,8 +63,14 @@ def test_but_jury_GB(test_client):
     - vérification jury de S2
     - vérification jury de S3
     - vérification jury de S1 avec redoublants et capitalisations
+    puis:
+    - teste feuille prepajury
     """
-    setup_and_test_jurys("tests/ressources/yaml/cursus_but_gb.yaml")
+    formsemestre: FormSemestre = setup_and_test_jurys(
+        "tests/ressources/yaml/cursus_but_gb.yaml"
+    )
+    # Test feuille préparation jury
+    sco_prepajury.feuille_preparation_jury(formsemestre.id)
 
 
 @pytest.mark.slow