diff --git a/tests/unit-tests/config-files/config-client-2 b/tests/unit-tests/config-files/config-client-2
new file mode 100644
index 0000000..4eb3958
--- /dev/null
+++ b/tests/unit-tests/config-files/config-client-2
@@ -0,0 +1,13 @@
+{
+  "ca-list":
+  [
+    {
+        "ca-prefix": "/ndn/edu/ucla",
+        "ca-info": "missing certificate",
+        "probe-parameters":
+        [
+          { "probe-parameter-key": "email" }
+        ]
+    }
+  ]
+}
\ No newline at end of file