diff --git a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
--- a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
+++ b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
@@ -84,6 +84,8 @@
 #    endif
 #  elif defined(__sparc64__)
   half_size();
+#  elif defined(__riscv)
+  full_size();
 #  elif defined(_WIN32)
   full_size();
 #  else