diff --git a/examples/gno.land/r/demo/foo1155/foo1155_test.gno b/examples/gno.land/r/demo/foo1155/foo1155_test.gno
index edd17d708fb..64d4bc1256f 100644
--- a/examples/gno.land/r/demo/foo1155/foo1155_test.gno
+++ b/examples/gno.land/r/demo/foo1155/foo1155_test.gno
@@ -18,8 +18,8 @@ func TestFoo721(t *testing.T) {
 		expected interface{}
 		fn       func() interface{}
 	}{
-		{"BalanceOf(admin, tid1)", 100, func() interface{} { return BalanceOf(admin, tid1) }},
-		{"BalanceOf(bob, tid1)", 0, func() interface{} { return BalanceOf(bob, tid1) }},
+		{"BalanceOf(admin, tid1)", uint64(100), func() interface{} { return BalanceOf(admin, tid1) }},
+		{"BalanceOf(bob, tid1)", uint64(0), func() interface{} { return BalanceOf(bob, tid1) }},
 		{"IsApprovedForAll(admin, bob)", false, func() interface{} { return IsApprovedForAll(admin, bob) }},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
diff --git a/examples/gno.land/r/demo/foo721/foo721_test.gno b/examples/gno.land/r/demo/foo721/foo721_test.gno
index 93a7e33f71d..2477ca34fde 100644
--- a/examples/gno.land/r/demo/foo721/foo721_test.gno
+++ b/examples/gno.land/r/demo/foo721/foo721_test.gno
@@ -18,8 +18,8 @@ func TestFoo721(t *testing.T) {
 		expected interface{}
 		fn       func() interface{}
 	}{
-		{"BalanceOf(admin)", 10, func() interface{} { return BalanceOf(admin) }},
-		{"BalanceOf(hariom)", 5, func() interface{} { return BalanceOf(hariom) }},
+		{"BalanceOf(admin)", uint64(10), func() interface{} { return BalanceOf(admin) }},
+		{"BalanceOf(hariom)", uint64(5), func() interface{} { return BalanceOf(hariom) }},
 		{"OwnerOf(0)", users.Resolve(admin), func() interface{} { return OwnerOf(grc721.TokenID("0")) }},
 		{"IsApprovedForAll(admin, hariom)", false, func() interface{} { return IsApprovedForAll(admin, hariom) }},
 	} {