diff --git a/unittest/core/t_trace.expected b/unittest/core/t_trace.expected
index e69de29b..26fd7a2d 100644
--- a/unittest/core/t_trace.expected
+++ b/unittest/core/t_trace.expected
@@ -0,0 +1,9 @@
+buf containing pa: li0e2:Tyi0ee
+li13e2:Tcd3:tag1:B2:tyi0e1:v4:Boolee
+li50e2:Tcd3:tag5:c.str2:tyi13e1:v1:aee
+li89e2:Tpl0:i13ei13eee
+li112e2:Tcd3:tag5:c.str2:tyi89e1:v1:pee
+li152e2:T@li112ei50eee
+
+(len 175)
+read pa: (p a)