diff --git a/automation/tests/gen-absurd-t-line.lua b/automation/tests/gen-absurd-t-line.lua
new file mode 100644
index 000000000..8bf0fac1e
--- /dev/null
+++ b/automation/tests/gen-absurd-t-line.lua
@@ -0,0 +1,34 @@
+script_name = "Absurdness"
+script_description = "Benchmark renderers by testing how they react to an absurd number of \\t tags in one line, and an absurd amount of lines each with a single \\t."
+script_author = "jfs"
+
+absurd = 1000
+
+ttext = "\\1a&H00&\\2a&H00&\\3a&H00&\\4a&H00&"
+
+function gen_one_absurd(subs, sel)
+	local l = subs[sel[1]]
+	l.text = ""
+	l.start_time = 0
+	l.end_time = (absurd+1)*100
+	for i = 1, absurd do
+		l.text = l.text .. string.format("{\\t(%d,%d,%s)}", i*100, (i+1)*100, ttext)
+	end
+	l.text = l.text .. "a"
+	subs[-sel[1]] = l
+	aegisub.set_undo_point("absurdness 1")
+end
+
+function gen_absurd_many(subs, sel)
+	local l = subs[sel[1]]
+	for i = 1, absurd do
+		l.start_time = i*100
+		l.end_time = (i+1)*100
+		l.text = string.format("{\\t(0,100,%s)}a", ttext)
+		subs[-sel[1]] = l
+	end
+	aegisub.set_undo_point("absurdness 2")
+end
+
+aegisub.register_macro("Generate absurd line", "Absurd", gen_one_absurd)
+aegisub.register_macro("Generate absurdly many lines", "Absurd", gen_absurd_many)