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-rw-r--r--test/unit/helpers.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/unit/helpers.lua b/test/unit/helpers.lua
index e56f8d5058..86d02e8c31 100644
--- a/test/unit/helpers.lua
+++ b/test/unit/helpers.lua
@@ -19,7 +19,7 @@ for _, p in ipairs(Paths.include_paths) do
Preprocess.add_to_include_path(p)
end
-local child_pid = nil --- @type integer
+local child_pid = nil --- @type integer?
--- @generic F: function
--- @param func F
--- @return F