diff --git a/src/api/filters.py b/src/api/filters.py
index 573dde8..9ca30d1 100644
--- a/src/api/filters.py
+++ b/src/api/filters.py
@@ -17,7 +17,7 @@ OPERATORS = {
     "sort",
 }
 
-RESERVED_PARAMS = {"page", "page_size", "columns", "count"}
+RESERVED_PARAMS = {"page", "page_size", "columns", "count_results"}
 
 
 class FilterError(ValueError):
diff --git a/src/api/routes.py b/src/api/routes.py
index 418492d..077d394 100644
--- a/src/api/routes.py
+++ b/src/api/routes.py
@@ -114,10 +114,10 @@ def schema():
             "description": "Liste de colonnes à retourner, séparées par des virgules (ex: `id,acheteur_id,montant`). Par défaut : toutes.",
         },
         {
-            "name": "count",
+            "name": "count_results",
             "in": "query",
             "schema": {"type": "string", "enum": ["true", "false"], "default": "true"},
-            "description": "Inclure le total (`COUNT(*)`) dans la réponse. Mettre `false` pour accélérer la requête.",
+            "description": "Inclure le total (`COUNT(*)`) dans `meta`. Mettre `false` pour accélérer la requête. Ignoré en mode agrégation.",
         },
         {
             "name": "<colonne>__<opérateur>",
@@ -142,14 +142,14 @@ def data():
     strictly_less, strictly_greater, in, notin, isnull, isnotnull, sort.
 
     Paramètres réservés : page (défaut 1), page_size (défaut 50, max 1000),
-    columns (csv), count (true|false ; mettre false pour économiser le COUNT(*)).
+    columns (csv), count_results (true|false ; mettre false pour économiser le COUNT(*)).
     """
     import polars as pl
     import polars.selectors as cs
 
     page, page_size = _parse_pagination()
     columns = _parse_columns()
-    count = request.args.get("count", "true").lower() != "false"
+    count_results = request.args.get("count_results", "true").lower() != "false"
 
     try:
         where_sql, params, order_sql = build_where(
@@ -170,7 +170,7 @@ def data():
     # JSON ne sérialise pas date/datetime nativement → cast en string ISO
     df_ready = df.with_columns(cs.temporal().cast(pl.String))
 
-    total = count_marches(where_sql, params) if count else None
+    total = count_marches(where_sql, params) if count_results else None
     meta = {"page": page, "page_size": page_size}
     if total is not None:
         meta["total"] = total
diff --git a/tests/api/test_endpoints_data.py b/tests/api/test_endpoints_data.py
index 8911062..991c1c3 100644
--- a/tests/api/test_endpoints_data.py
+++ b/tests/api/test_endpoints_data.py
@@ -17,9 +17,9 @@ def test_data_default_pagination(api_client, valid_token_header):
     assert "total" in body["meta"]
 
 
-def test_data_count_false_omits_total(api_client, valid_token_header):
+def test_data_count_results_false_omits_total(api_client, valid_token_header):
     client, _ = api_client
-    resp = client.get("/api/v1/data?count=false", headers=valid_token_header)
+    resp = client.get("/api/v1/data?count_results=false", headers=valid_token_header)
     assert resp.status_code == 200
     body = resp.get_json()
     assert "total" not in body["meta"]
diff --git a/tests/api/test_filters.py b/tests/api/test_filters.py
index b7706fe..8d3ecd5 100644
--- a/tests/api/test_filters.py
+++ b/tests/api/test_filters.py
@@ -114,7 +114,7 @@ def test_reserved_params_are_ignored():
             ("page", "2"),
             ("page_size", "100"),
             ("columns", "uid"),
-            ("count", "false"),
+            ("count_results", "false"),
             ("uid__exact", "z"),
         ],
         SCHEMA,
diff --git a/tests/conftest.py b/tests/conftest.py
index 9ef9b6a..3ff37f7 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -74,7 +74,8 @@ def test_data():
     _cleanup_db_artifacts()
 
 
-def pytest_setup_options():
+@pytest.fixture(scope="session")
+def chrome_options():
     options = Options()
     options.add_argument("--window-size=1200,1200 ")
     options.add_experimental_option(