Include <cinttypes> for PRIuPTR. Not clear why this is needed.
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index fc96ea5..6c7eae5 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -31,6 +31,7 @@
  *
  */
 
+#include <cinttypes>
 #include <memory>
 #include <thread>