diff --git a/src/cpp/ripple/ripple_ProofOfWorkFactory.cpp b/src/cpp/ripple/ripple_ProofOfWorkFactory.cpp
index 2896d23da..1df2d79d3 100644
--- a/src/cpp/ripple/ripple_ProofOfWorkFactory.cpp
+++ b/src/cpp/ripple/ripple_ProofOfWorkFactory.cpp
@@ -236,7 +236,7 @@ IProofOfWorkFactory* IProofOfWorkFactory::New ()
 class ProofOfWorkTests : public UnitTest
 {
 public:
-    ProofOfWorkTests () : UnitTest ("ProofOfWork", "ripple")
+    ProofOfWorkTests () : UnitTest ("ProofOfWork", "ripple", UnitTest::runManual)
     {
     }