diff --git a/hysop/operator/tests/test_custom_symbolic.py b/hysop/operator/tests/test_custom_symbolic.py
index ff5930c3ac1d5a542d62068a17cfad512969ccab..49d8e4287bd376c5a28363e8c134651d73039821 100644
--- a/hysop/operator/tests/test_custom_symbolic.py
+++ b/hysop/operator/tests/test_custom_symbolic.py
@@ -34,9 +34,9 @@ class TestCustomSymbolic(object):
             cls.size_min = 4
             cls.size_max = 6
         else:
-            cls.size_min0 = 8
-            cls.size_max0 = 4096
-            cls.size_min = 8
+            cls.size_min0 = 16
+            cls.size_max0 = 16
+            cls.size_min = 16
             cls.size_max = 16
 
         cls.enable_extra_tests = enable_extra_tests