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-rw-r--r--test/functional/ui/screen.lua7
1 files changed, 7 insertions, 0 deletions
diff --git a/test/functional/ui/screen.lua b/test/functional/ui/screen.lua
index 9635f6119c..60198bb008 100644
--- a/test/functional/ui/screen.lua
+++ b/test/functional/ui/screen.lua
@@ -259,6 +259,13 @@ This is probably due to an indeterminism in the test. Try adding
`wait()` (or even a separate `screen:expect(...)`) at a point of possible
indeterminism, typically in between a `feed()` or `execute()` which is non-
synchronous, and a synchronous api call.
+
+Note that sometimes a `wait` can trigger redraws and consequently generate more
+indeterminism. If adding `wait` calls seems to increase the frequency of these
+messages, try removing every `wait` call in the test.
+
+If everything else fails, use Screen:redraw_debug to help investigate what is
+ causing the problem.
]])
local tb = debug.traceback()
local index = string.find(tb, '\n%s*%[C]')