diff --git a/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp b/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
index 64abf99891d6f..7e049ba81a1b7 100644
--- a/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
+++ b/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
@@ -3,12 +3,6 @@
 // Check that fake stack does not discard frames on the main stack, when GC is
 // triggered from high alt stack.
 
-// FIXME: Investigate.
-// UNSUPPORTED: android
-
-// FIXME: Fails on Darwin
-// UNSUPPORTED: darwin
-
 #include <algorithm>
 #include <assert.h>
 #include <csignal>
@@ -36,7 +30,7 @@ static void Handler(int signo) {
   // Trigger GC and create a lot of frame to reuse "Thread" frame if it was
   // discarded.
   for (int i = 0; i < 1000; ++i)
-    Fn<1000>();
+    Fn<100>();
   // If we discarder and reused "Thread" frame, the next line will crash with
   // false report.
   *on_thread = 10;