diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index c7028d2..c2260c7 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -153,12 +153,13 @@
 
 " Names of flaky tests.
 let s:flaky = [
-      \ 'Test_reltime()',
-      \ 'Test_nb_basic()',
-      \ 'Test_communicate()',
       \ 'Test_close_and_exit_cb()',
+      \ 'Test_collapse_buffers()',
+      \ 'Test_communicate()',
+      \ 'Test_nb_basic()',
       \ 'Test_pipe_through_sort_all()',
       \ 'Test_pipe_through_sort_some()'
+      \ 'Test_reltime()',
       \ ]
 
 " Locate Test_ functions and execute them.
diff --git a/src/version.c b/src/version.c
index ef5ddae..6b0953f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    284,
+/**/
     283,
 /**/
     282,