diff --git a/app/scodoc/sco_cache.py b/app/scodoc/sco_cache.py
index e51806b9..579aff12 100644
--- a/app/scodoc/sco_cache.py
+++ b/app/scodoc/sco_cache.py
@@ -104,7 +104,11 @@ class ScoDocCache:
 
 
 class EvaluationCache(ScoDocCache):
-    "Cache for evaluations"
+    """Cache for evaluations.
+    Clé: evaluation_id
+    Valeur: { 'etudid' : note }
+    """
+
     prefix = "EVAL"
 
     @classmethod
diff --git a/app/scodoc/sco_evaluations.py b/app/scodoc/sco_evaluations.py
index 4a30f8f1..eba208b8 100644
--- a/app/scodoc/sco_evaluations.py
+++ b/app/scodoc/sco_evaluations.py
@@ -568,7 +568,7 @@ def do_evaluation_etat(
     }
 
 
-def do_evaluation_list_in_sem(context, formsemestre_id):
+def do_evaluation_list_in_sem(context, formsemestre_id, with_etat=True):
     """Liste les evaluations de tous les modules de ce semestre.
        Donne pour chaque eval son état (voir do_evaluation_etat)
        { evaluation_id,nb_inscrits, nb_notes, nb_abs, nb_neutre, moy, median, last_modif ... }
@@ -624,7 +624,8 @@ def do_evaluation_list_in_sem(context, formsemestre_id):
     # etat de chaque evaluation:
     for r in res:
         r["jour"] = r["jour"] or datetime.date(1900, 1, 1)  # pour les comparaisons
-        r["etat"] = do_evaluation_etat(context, r["evaluation_id"])
+        if with_etat:
+            r["etat"] = do_evaluation_etat(context, r["evaluation_id"])
 
     return res
 
diff --git a/tests/unit/test_caches.py b/tests/unit/test_caches.py
index 2b06f148..43db1f1e 100644
--- a/tests/unit/test_caches.py
+++ b/tests/unit/test_caches.py
@@ -13,6 +13,7 @@ from flask import current_app
 
 from app import db
 from app.scodoc import sco_cache
+from app.scodoc import sco_evaluations
 from app.scodoc import sco_formsemestre
 
 DEPT = "RT"  # ce département (BD) doit exister
@@ -29,3 +30,27 @@ def test_notes_table(test_client):
     assert sco_cache.NotesTableCache.get(formsemestre_id, compute=False)
     sco_cache.invalidate_formsemestre(formsemestre_id)
     assert not sco_cache.NotesTableCache.get(formsemestre_id, compute=False)
+
+
+def test_cache_evaluations(test_client):
+    """"""
+    # cherche un semestre ayant des evaluations
+    sems = sco_formsemestre.do_formsemestre_list(None)
+    assert len(sems)
+    sem_evals = []
+    for sem in sems:
+        sem_evals = sco_evaluations.do_evaluation_list_in_sem(
+            None, sem["formsemestre_id"], with_etat=False
+        )
+        if sem_evals:
+            break
+    if not sem_evals:
+        raise Exception("no evaluations")
+    #
+    evaluation_id = sem_evals[0]["evaluation_id"]
+    sco_evaluations.do_evaluation_get_all_notes(None, evaluation_id)
+    # should have been be cached:
+    assert sco_cache.EvaluationCache.get(evaluation_id)
+    sco_cache.invalidate_formsemestre(sem["formsemestre_id"])
+    # should have been erased from cache:
+    assert not sco_cache.EvaluationCache.get(evaluation_id)