diff --git a/tests/T2120.stdout b/tests/T2120.stdout
index 518a3e883f19dab10041a7c92919a2bdd85b3365..89c73bc934197af70cf445a95b4da228f103f675 100644
--- a/tests/T2120.stdout
+++ b/tests/T2120.stdout
@@ -1,2 +1,6 @@
 Ix{Int}.index: Index (5) out of range ((1,4))
+CallStack:
+  error, called at libraries/base/GHC/Arr.hs:176:5 in base:GHC.Arr
 Error in array index
+CallStack:
+  error, called at libraries/base/GHC/Arr.hs:182:22 in base:GHC.Arr