diff --git a/.zshrc2 b/.zshrc2
index e89558a..5ad32e4 100644
--- a/.zshrc2
+++ b/.zshrc2
@@ -107,6 +107,8 @@ piv-agent()
             break
         fi
     done
+    echo "opensc-pkcs11.so not found"
+    return 1
 }
 
 # key bindings
diff --git a/tools/test.zsh b/tools/test.zsh
index f3e861d..19024b8 100644
--- a/tools/test.zsh
+++ b/tools/test.zsh
@@ -27,7 +27,8 @@ tools/common.sh get_linux_dist
 
 # check alias
 alias p114
-which sibd
+sibd || which sibd
+piv-agent || which piv-agent
 
 # check update
 DFS_VERSION=`dfs version`