diff --git a/tests/test-mbptree.c b/tests/test-mbptree.c
index 2bddaead..057210f4 100644
--- a/tests/test-mbptree.c
+++ b/tests/test-mbptree.c
@@ -23,11 +23,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "m-bptree.h"
+#include "mympz.h"
 #include "coverage.h"
 
 START_COVERAGE
 BPTREE_DEF2(btree, 3, int, M_DEFAULT_OPLIST, int, M_DEFAULT_OPLIST)
 END_COVERAGE
+BPTREE_DEF2(btree_my, 3, my_mpz_t, MYMPZ2_OPLIST, my_mpz_t, MYMPZ2_OPLIST)
   
 static void test1(void)
 {