diff --git a/tests/malloc_test.cpp b/tests/malloc_test.cpp
index 3a09258..d73f243 100644
--- a/tests/malloc_test.cpp
+++ b/tests/malloc_test.cpp
@@ -46,6 +46,7 @@
 #if defined(__BIONIC__)
 
 #include "SignalUtils.h"
+#include "dlext_private.h"
 
 #include "platform/bionic/malloc.h"
 #include "platform/bionic/mte.h"
@@ -1351,3 +1352,22 @@
   GTEST_SKIP() << "bionic extension";
 #endif
 }
+
+TEST(malloc, allocation_slack) {
+#if defined(__BIONIC__)
+  bool allocator_scudo;
+  GetAllocatorVersion(&allocator_scudo);
+  if (!allocator_scudo) {
+    GTEST_SKIP() << "scudo allocator only test";
+  }
+
+  // Test that older target SDK levels let you access a few bytes off the end of
+  // a large allocation.
+  android_set_application_target_sdk_version(29);
+  auto p = std::make_unique<char[]>(131072);
+  volatile char *vp = p.get();
+  volatile char oob ATTRIBUTE_UNUSED = vp[131072];
+#else
+  GTEST_SKIP() << "bionic extension";
+#endif
+}