diff --git a/tests/caps.py b/tests/caps.py
index 7a0b83f..7fceeaf 100644
--- a/tests/caps.py
+++ b/tests/caps.py
@@ -36,7 +36,7 @@
         break;
     match.in_port = port
     match.ipv4_src = 1
-    request = ofp.message.flow_mod()
+    request = ofp.message.flow_add()
     count_check = 101  # fixme:  better way to determine this.
     if is_exact:
         match.wildcards = 0