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
@@ -92,7 +92,15 @@
 
 #else
 
+# if defined(__arm__) || defined(__aarch64__)
+#   ifdef __BIG_ENDIAN__
+  full_size();
+#   else
   half_size();
+#   endif
+# else
+  half_size();
+# endif
 
 #endif