diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 6c14c0126271..45d0407d39d6 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -83,7 +83,6 @@ static bool test_uffdio_wp = false;
 static bool test_uffdio_minor = false;
 
 static bool map_shared;
-static int shm_fd;
 static int huge_fd;
 static char *huge_fd_off0;
 static unsigned long long *count_verify;
@@ -277,11 +276,8 @@ static void shmem_release_pages(char *rel_area)
 
 static void shmem_allocate_area(void **alloc_area)
 {
-	unsigned long offset =
-		alloc_area == (void **)&area_src ? 0 : nr_pages * page_size;
-
 	*alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE,
-			   MAP_SHARED, shm_fd, offset);
+			   MAP_ANONYMOUS | MAP_SHARED, -1, 0);
 	if (*alloc_area == MAP_FAILED)
 		err("mmap of memfd failed");
 }
@@ -1441,16 +1437,6 @@ int main(int argc, char **argv)
 			err("Open of %s failed", argv[4]);
 		if (ftruncate(huge_fd, 0))
 			err("ftruncate %s to size 0 failed", argv[4]);
-	} else if (test_type == TEST_SHMEM) {
-		shm_fd = memfd_create(argv[0], 0);
-		if (shm_fd < 0)
-			err("memfd_create");
-		if (ftruncate(shm_fd, nr_pages * page_size * 2))
-			err("ftruncate");
-		if (fallocate(shm_fd,
-			      FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0,
-			      nr_pages * page_size * 2))
-			err("fallocate");
 	}
 	printf("nr_pages: %lu, nr_pages_per_cpu: %lu\n",
 	       nr_pages, nr_pages_per_cpu);