diff --git a/test/issues/26.lean b/test/issues/26.lean
new file mode 100644
index 00000000..b1f28b27
--- /dev/null
+++ b/test/issues/26.lean
@@ -0,0 +1,23 @@
+import SciLean
+
+
+variable (a : Nat)
+
+/- expected
+info: let x := a + a;
+a + (a + x) : ℕ
+-/
+
+/--
+info: a +
+  let x := a + a;
+  a + x : ℕ
+-/
+#guard_msgs in
+#check 
+  (a + 
+    (a + 
+    let x := a + a
+    x))
+  rewrite_by
+    lsimp (config := {zeta := false, singlePass := true})