diff --git a/test/command/test_cat.rb b/test/command/test_cat.rb
index f1e1067823..b2e9cce5cd 100644
--- a/test/command/test_cat.rb
+++ b/test/command/test_cat.rb
@@ -18,7 +18,7 @@ def setup
     @primary = create_primary
     metadata = @primary.buffer.new_metadata
     @chunk = create_chunk(@primary, metadata, @es)
-    @port = unused_port(protocol: :tcp)
+    @port = unused_port(protocol: :udp)
   end
 
   def teardown