diff --git a/test/test_lowlevel.py b/test/test_lowlevel.py
index 4822b502..bd2d111b 100644
--- a/test/test_lowlevel.py
+++ b/test/test_lowlevel.py
@@ -137,7 +137,7 @@ def test05_array_as_ref(self):
         f = array('f', [0]);     ctd.set_float_r(f);  assert f[0] ==  5.
         f = array('d', [0]);     ctd.set_double_r(f); assert f[0] == -5.
 
-    @mark.xfail(reason = "Valgrind detects memory leak with invalid delete[] operator") 
+    @mark.xfail(run=not IS_CLANG_REPL, reason="Valgrind detects memory leak with invalid delete[] operator, crashes on Cling") 
     def test06_ctypes_as_ref_and_ptr(self):
         """Use ctypes for pass-by-ref/ptr"""