1 files changed, 28 insertions, 0 deletions
diff --git a/tests/run.lua b/tests/run.lua
index c626444..aa01e7f 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -6561,6 +6561,34 @@ test("Visual movement retains its persistent feedback anchor", function()
   truthy(host:highlights()[persistent.identity] ~= nil)
 end)
 
+test("Highlight timeout requires marks delay and timer support", function()
+  for _, mark_char in ipairs({ false, true }) do
+    for _, delay in ipairs({ 0, 25 }) do
+      for _, supported in ipairs({ false, true }) do
+        fresh_sequence_state()
+        local host = MemoryHost.new({
+          configuration = {
+            mark_char = mark_char,
+            highlight_timeout_ms = delay,
+          },
+          timer_support = supported,
+        })
+        local actual = feedback_service.new(host):highlight_timer_delay()
+        local expected = mark_char and delay > 0 and supported and delay or nil
+        same(
+          expected,
+          actual,
+          table.concat({
+            tostring(mark_char),
+            tostring(delay),
+            tostring(supported),
+          }, ":")
+        )
+      end
+    end
+  end
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then