diff --git a/compiler-rt/lib/asan/lit_tests/free_hook_realloc.cc b/compiler-rt/lib/asan/lit_tests/free_hook_realloc.cc
index 5f678e6dc01f..92f5acd6dc8c 100644
--- a/compiler-rt/lib/asan/lit_tests/free_hook_realloc.cc
+++ b/compiler-rt/lib/asan/lit_tests/free_hook_realloc.cc
@@ -1,18 +1,31 @@
 // Check that free hook doesn't conflict with Realloc.
-// RUN: %clangxx_asan -O2 %s -o %t && %t
-#include <assert.h>
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: %t 2>&1 | FileCheck %s
 #include <stdlib.h>
+#include <unistd.h>
+
+static void *glob_ptr;
 
 extern "C" {
 void __asan_free_hook(void *ptr) {
-  *(int*)ptr = 0;
+  if (ptr == glob_ptr) {
+    *(int*)ptr = 0;
+    write(1, "FreeHook\n", sizeof("FreeHook\n"));
+  }
 }
 }
 
 int main() {
   int *x = (int*)malloc(100);
   x[0] = 42;
+  glob_ptr = x;
   int *y = (int*)realloc(x, 200);
-  assert(y[0] == 42);
+  // Verify that free hook was called and didn't spoil the memory.
+  if (y[0] != 42) {
+    _exit(1);
+  }
+  write(1, "Passed\n", sizeof("Passed\n"));
+  // CHECK: FreeHook
+  // CHECK: Passed
   return 0;
 }