diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 56bb3d3..89c1e3a 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -281,6 +281,7 @@
       \ 'Test_close_callback()',
       \ 'Test_close_handle()',
       \ 'Test_close_lambda()',
+      \ 'Test_close_output_buffer()',
       \ 'Test_close_partial()',
       \ 'Test_collapse_buffers()',
       \ 'Test_communicate()',
diff --git a/src/version.c b/src/version.c
index 0231cc8..a485b28 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    600,
+/**/
     599,
 /**/
     598,