diff --git a/test/functional/ui/output_spec.lua b/test/functional/ui/output_spec.lua
index 896e773897..c95c51b192 100644
--- a/test/functional/ui/output_spec.lua
+++ b/test/functional/ui/output_spec.lua
@@ -64,7 +64,7 @@ describe('shell command :!', function()
     ]])
   end)
 
-  it('throttles shell-command output greater than ~10KB', function()
+  it('throttles shell-command output greater than ~10KB', { retries = 2 }, function()
     skip(is_os('openbsd'), 'FIXME #10804')
     skip(is_os('win'))
     tt.feed_data((':!%s REP 150001 foo\n'):format(testprg('shell-test')))