diff --git a/tests/lean/run/998.lean b/tests/lean/run/998.lean
new file mode 100644
index 0000000000..cf61f27a52
--- /dev/null
+++ b/tests/lean/run/998.lean
@@ -0,0 +1,13 @@
+import Lean
+set_option maxHeartbeats 100000
+-- attribute [simp] Array.findIdx?.loop -- Still broken
+attribute [simp] Lean.expandExplicitBindersAux.loop
+attribute [simp] Lean.Elab.Term.resolveLocalName.loop
+
+
+-- Mathlib
+-- attribute [simp] BinaryHeap.heapifyDown
+-- attribute [simp] ByteSlice.forIn.loop
+-- attribute [simp] Lean.Export.exportName
+-- attribute [simp] Lean.Export.exportLevel
+-- attribute [simp] Array.heapSort.loop