diff --git a/tests/test_allowed_to_fail.nim b/tests/test_allowed_to_fail.nim
index 3286ec3c5..f6cdb5e80 100644
--- a/tests/test_allowed_to_fail.nim
+++ b/tests/test_allowed_to_fail.nim
@@ -87,6 +87,8 @@ func slowGSTTests(folder: string, name: string): bool =
 
               # Istanbul slow tests
               "CALLBlake2f_MaxRounds.json",
+              "loopMul.json",
+              "loopExp.json",
 
               ]