diff --git a/samples/loop/client.lua b/samples/loop/client.lua
index 7e5430d..f2033c7 100644
--- a/samples/loop/client.lua
+++ b/samples/loop/client.lua
@@ -23,6 +23,8 @@ while true do
    assert( peer:dohandshake() )
    --]]
 
+   peer:getpeercertificate():extensions()
+
    print(peer:receive("*l"))
    peer:close()
 end