diff --git a/hysop/operator/tests/test_custom_symbolic.py b/hysop/operator/tests/test_custom_symbolic.py
index 6fab331b1aefcb9cfb9509b85b8c3fbeafa20117..305c9a5c33c7d4c29eb9031a0888a26665ec7348 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 = 6
+            cls.size_min0 = 8
             cls.size_max0 = 4096
-            cls.size_min = 3
+            cls.size_min = 8
             cls.size_max = 16
 
         cls.enable_extra_tests = enable_extra_tests