diff --git a/src/ripple/test/AbstractClient.h b/src/ripple/test/AbstractClient.h
index d11c7a700..d15cea8ba 100644
--- a/src/ripple/test/AbstractClient.h
+++ b/src/ripple/test/AbstractClient.h
@@ -34,6 +34,9 @@ class AbstractClient
 {
 public:
     virtual ~AbstractClient() = default;
+    AbstractClient() = default;
+    AbstractClient(AbstractClient const&) = delete;
+    AbstractClient& operator=(AbstractClient const&) = delete;
 
     /** Submit a command synchronously.
 
diff --git a/src/ripple/test/impl/WSClient.cpp b/src/ripple/test/impl/WSClient.cpp
index 856d0f2cd..db1eda05c 100644
--- a/src/ripple/test/impl/WSClient.cpp
+++ b/src/ripple/test/impl/WSClient.cpp
@@ -297,7 +297,7 @@ private:
     void
     on_read_done()
     {
-        std::lock_guard<std::mutex> lock(m_);
+        std::lock_guard<std::mutex> lock(m0_);
         b0_ = true;
         cv0_.notify_all();
     }