THRIFT-5217 Deprecated boost header
Client: cpp
Patch: Zezeng Wang

This closes #2158
diff --git a/lib/cpp/test/ToStringTest.cpp b/lib/cpp/test/ToStringTest.cpp
index d204cb3..5a05ed7 100644
--- a/lib/cpp/test/ToStringTest.cpp
+++ b/lib/cpp/test/ToStringTest.cpp
@@ -20,7 +20,7 @@
 #include <vector>
 #include <map>
 
-#include <boost/test/auto_unit_test.hpp>
+#include <boost/test/unit_test.hpp>
 
 #include <thrift/TToString.h>