diff --git a/tests/lang/eval-okay-tail-call-1.exp b/tests/lang/eval-okay-tail-call-1.exp
new file mode 100644
index 0000000000000000000000000000000000000000..f7393e847d34d19031ee0ba57df63e4d0ccb4fb2
--- /dev/null
+++ b/tests/lang/eval-okay-tail-call-1.exp
@@ -0,0 +1 @@
+100000
diff --git a/tests/lang/eval-okay-tail-call-1.nix b/tests/lang/eval-okay-tail-call-1.nix
new file mode 100644
index 0000000000000000000000000000000000000000..a3962ce3fdb5f90a5f6ceb21ce2990d66b9424f8
--- /dev/null
+++ b/tests/lang/eval-okay-tail-call-1.nix
@@ -0,0 +1,3 @@
+let
+  f = n: if n == 100000 then n else f (n + 1);
+in f 0