diff --git a/t/oo/vtableoverride.t b/t/oo/vtableoverride.t
index de2625d..a6b3724 100644
--- a/t/oo/vtableoverride.t
+++ b/t/oo/vtableoverride.t
@@ -17,11 +17,12 @@ Tests the behavior of VTABLE interfaces that have been overriden from PIR.
 
 .sub main :main
     .include 'test_more.pir'
-    plan(15)
+    plan(18)
 
     newclass_tests()
     subclass_tests()
     vtable_implies_self_tests()
+     mmd_override_not_proxied()
     anon_vtable_tests()
     invalid_vtable()
     get_pmc_keyed_int_Null()
@@ -122,6 +123,43 @@ CODE
     ok($I0, "Override get_pmc_keyed_int without .return - TT #1593")
 .end
 
+.sub 'mmd_override_not_proxied'
+    .local pmc integer_cl, three_cl, three_obj
+
+    get_class integer_cl, 'Integer'
+    subclass three_cl, integer_cl, 'Three'
+    three_cl.'add_attribute'('marker')
+    three_cl.'add_attribute'('zero_marker')
+    three_cl.'add_attribute'('one_marker')
+    three_obj = new 'Three'
+
+    # zero_marker/one_marker initialization should go in init vtable method
+    # -- todo because seems to seg fault now
+    $P0 = new ['Integer']
+    $P0 = 0
+    setattribute three_obj, 'zero_marker', $P0
+    $P0 = new ['Integer']
+    $P0 = 1
+    setattribute three_obj, 'one_marker', $P0
+   
+    # not mmd but basic test
+    three_obj.'clear_marker'()
+    $I0 = three_obj
+    three_obj.'verify_marker'('assign to int register calls vtable get_integer override')
+
+    .local pmc i
+    i = new 'Integer'
+    i = 2
+
+    three_obj.'clear_marker'()
+    $P0 = sub three_obj, i
+    three_obj.'verify_marker'('subtract calls vtable get_integer override')
+    
+    three_obj.'clear_marker'()
+    $I0 = cmp_num three_obj, i
+    three_obj.'verify_marker'('cmp_num with calls vtable get_integer override')
+.end
+
 .namespace [ 'MyObject' ]
 
 .sub '__onload' :anon :init
@@ -220,6 +258,27 @@ yes:
     # No .return
 .end
 
+.namespace ['Three']
+
+.sub '' :vtable('get_integer') :method
+    $P0 = getattribute self, 'one_marker'
+    setattribute self, 'marker', $P0
+    .return (3)
+.end
+
+.sub clear_marker :method
+    $P0 = getattribute self, 'zero_marker'
+    setattribute self, 'marker', $P0
+.end
+
+.sub verify_marker :method
+    .param string test_description
+    .local pmc get_integer_marker
+
+    get_integer_marker = getattribute self, 'marker'
+    is(get_integer_marker, 1, test_description)
+.end
+
 # Local Variables:
 #   mode: pir
 #   fill-column: 100