diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index ff32abc..cacfa75 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -279,6 +279,7 @@
       \ 'Test_collapse_buffers()',
       \ 'Test_communicate()',
       \ 'Test_cwd()',
+      \ 'Test_diff_screen()',
       \ 'Test_exit_callback_interval()',
       \ 'Test_nb_basic()',
       \ 'Test_oneshot()',
diff --git a/src/version.c b/src/version.c
index ad815fb..e3491a0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    520,
+/**/
     519,
 /**/
     518,