a command line for clang-tidy.
// RUN: %check_clang_tidy %s -std=c++14 cert-mem57-cpp %t
-// RUN: clang-tidy --extra-arg='-std=c++17' --extra-arg='-faligned-allocation' -checks='-*,cert-mem57-cpp' --warnings-as-errors='*' %s
-// RUN: clang-tidy --extra-arg='-std=c++2a' --extra-arg='-faligned-allocation' -checks='-*,cert-mem57-cpp' --warnings-as-errors='*' %s
+// RUN: clang-tidy --extra-arg='-std=c++17' --extra-arg='-faligned-allocation' -checks='-*,cert-mem57-cpp' --extra-arg=-Wno-unused-variable --warnings-as-errors='*' %s
+// RUN: clang-tidy --extra-arg='-std=c++2a' --extra-arg='-faligned-allocation' -checks='-*,cert-mem57-cpp' --extra-arg=-Wno-unused-variable --warnings-as-errors='*' %s
struct alignas(128) Vector {
char Elems[128];