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
@@ -64,7 +64,7 @@
 
 #if _LIBCPP_ABI_VERSION == 1
 
-# if defined(__x86_64__)
+# if defined(__x86_64__) || defined(__i386__)
   full_size();
 # elif defined(__APPLE__) && defined(__aarch64__)
   half_size();
@@ -74,7 +74,7 @@
 #   else
   full_size();
 #   endif
-# elif defined(__powerpc__) || defined(__powerpc64__)
+# elif defined(__powerpc__) || defined(__powerpc64__) || defined(__sparc64__)
   half_size();
 # elif defined(_WIN32)
   full_size();