diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
index a61b7b3da5496285876b0e16b18a3060850b0803..59ec0b59f7b76ff75685bd96901d8237e0665b2b 100644
--- a/tools/testing/selftests/net/tcp_mmap.c
+++ b/tools/testing/selftests/net/tcp_mmap.c
@@ -179,6 +179,10 @@ void *child_thread(void *arg)
 				total_mmap += zc.length;
 				if (xflg)
 					hash_zone(addr, zc.length);
+				/* It is more efficient to unmap the pages right now,
+				 * instead of doing this in next TCP_ZEROCOPY_RECEIVE.
+				 */
+				madvise(addr, zc.length, MADV_DONTNEED);
 				total += zc.length;
 			}
 			if (zc.recv_skip_hint) {