diff --git a/src/ripple/app/main/Main.cpp b/src/ripple/app/main/Main.cpp
index 326117eab7..4f5d60c28b 100644
--- a/src/ripple/app/main/Main.cpp
+++ b/src/ripple/app/main/Main.cpp
@@ -136,7 +136,7 @@ setupConfigForUnitTests (Config* config)
 
 static
 int
-runUnitTests (std::string pattern, std::string format)
+runUnitTests(std::string const& pattern, std::string const& argument)
 {
     // Config needs to be set up before creating Application
     setupConfigForUnitTests (&getConfig ());
@@ -145,6 +145,7 @@ runUnitTests (std::string pattern, std::string format)
     using namespace beast::unit_test;
     beast::debug_ostream stream;
     reporter r (stream);
+    r.arg(argument);
     bool const failed (r.run_each_if (
         global_suites(), match_auto (pattern)));
     if (failed)
@@ -190,7 +191,7 @@ int run (int argc, char** argv)
     ("rpc_port", po::value <int> (), "Specify the port number for RPC command.")
     ("standalone,a", "Run with no peers.")
     ("unittest,u", po::value <std::string> ()->implicit_value (""), "Perform unit tests.")
-    ("unittest-format", po::value <std::string> ()->implicit_value ("text"), "Format unit test output. Choices are 'text', 'junit'")
+    ("unittest-arg", po::value <std::string> ()->implicit_value (""), "Supplies argument to unit tests.")
     ("parameters", po::value< vector<string> > (), "Specify comma separated parameters.")
     ("quiet,q", "Reduce diagnotics.")
     ("quorum", po::value <int> (), "Set the validation quorum.")
@@ -279,12 +280,12 @@ int run (int argc, char** argv)
     //
     if (vm.count ("unittest"))
     {
-        std::string format;
+        std::string argument;
 
-        if (vm.count ("unittest-format"))
-            format = vm ["unittest-format"].as <std::string> ();
+        if (vm.count("unittest-arg"))
+            argument = vm["unittest-arg"].as<std::string>();
 
-        return runUnitTests (vm ["unittest"].as <std::string> (), format);
+        return runUnitTests(vm["unittest"].as<std::string>(), argument);
     }
 
     if (!iResult)