diff --git a/malloc/Makefile b/malloc/Makefile
index c1a03f3cb0..cc14cf66c9 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -34,6 +34,7 @@ tests := \
   tst-interpose-nothread \
   tst-interpose-thread \
   tst-malloc \
+  tst-malloc-alternate-path \
   tst-malloc-backtrace \
   tst-malloc-check \
   tst-malloc-fork-deadlock \
diff --git a/malloc/tst-malloc-alternate-path.c b/malloc/tst-malloc-alternate-path.c
new file mode 100644
index 0000000000..43ae916815
--- /dev/null
+++ b/malloc/tst-malloc-alternate-path.c
@@ -0,0 +1,72 @@
+/* Test that malloc uses mmap when sbrk or brk fails.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* This test sets up an obstruction to ensure that brk/sbrk fails to
+   grow the heap, then verifies that malloc uses mmap for allocations
+   instead.  */
+
+#include <unistd.h>
+#include <sys/mman.h>
+#include <stdlib.h>
+#include <libc-pointer-arith.h>
+#include <support/check.h>
+#include <stddef.h>
+#include <stdalign.h>
+
+#define LARGE_SIZE (10 * (1 << 20)) // 10 MB
+static long page_size;
+
+static int
+do_test (void)
+{
+  /* Get current program break.  */
+  void *current_brk = sbrk (0);
+
+  page_size = sysconf (_SC_PAGESIZE);
+
+  /* Round up to the next page boundary.  */
+  void *next_page_boundary = PTR_ALIGN_UP (current_brk, page_size);
+
+  /* Place a mapping using mmap at the next page boundary.  */
+  void *obstruction_addr
+  = mmap (next_page_boundary, page_size, PROT_READ,
+    MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+
+  /* Check if memory obstruction is set up correctly.  */
+  TEST_VERIFY_EXIT (obstruction_addr == next_page_boundary);
+
+  /* Try to extend the heap beyond the obstruction using sbrk */
+  int *ptr = sbrk (page_size);
+  TEST_VERIFY_EXIT (ptr == (void *) -1);
+
+  /* Attempt multiple small allocations using malloc.  */
+  for (size_t i = 0; i < page_size / alignof (max_align_t); i++)
+    {
+      TEST_VERIFY (malloc (alignof (max_align_t)));
+    }
+
+  /* Attempt to allocate a large block of memory using malloc.  */
+  TEST_VERIFY_EXIT (malloc (LARGE_SIZE) != NULL);
+
+  /* Check if malloc changed current program break.  */
+  TEST_VERIFY_EXIT (current_brk == sbrk (0));
+
+  return 0;
+}
+
+#include <support/test-driver.c>