diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index ed90ab4..aca476f 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -1403,7 +1403,7 @@
   // We can't actually generate a backtrace, just make sure that the process terminates.
 }
 
-__attribute__((noinline)) extern "C" bool raise_debugger_signal(DebuggerdDumpType dump_type) {
+__attribute__((__noinline__)) extern "C" bool raise_debugger_signal(DebuggerdDumpType dump_type) {
   siginfo_t siginfo;
   siginfo.si_code = SI_QUEUE;
   siginfo.si_pid = getpid();
diff --git a/libutils/CallStack_test.cpp b/libutils/CallStack_test.cpp
index 2ea1911..2cfaf61 100644
--- a/libutils/CallStack_test.cpp
+++ b/libutils/CallStack_test.cpp
@@ -22,7 +22,7 @@
 #include <gtest/gtest.h>
 #include <utils/CallStack.h>
 
-[[clang::noinline]] extern "C" void CurrentCaller(android::String8& backtrace) {
+__attribute__((__noinline__)) extern "C" void CurrentCaller(android::String8& backtrace) {
     android::CallStack cs;
     cs.update();
     backtrace = cs.toString();
@@ -35,7 +35,8 @@
     ASSERT_NE(-1, backtrace.find("(CurrentCaller")) << "Full backtrace:\n" << backtrace;
 }
 
-[[clang::noinline]] extern "C" void ThreadBusyWait(std::atomic<pid_t>* tid, volatile bool* done) {
+__attribute__((__noinline__)) extern "C" void ThreadBusyWait(std::atomic<pid_t>* tid,
+                                                             volatile bool* done) {
     *tid = android::base::GetThreadId();
     while (!*done) {
     }