diff --git a/examples/acceptance_tests/087/lib/tests.ak b/examples/acceptance_tests/087/lib/tests.ak
index 0c11a588..db884927 100644
--- a/examples/acceptance_tests/087/lib/tests.ak
+++ b/examples/acceptance_tests/087/lib/tests.ak
@@ -1,7 +1,7 @@
 use aiken/cbor.{diagnostic, serialise}
 
 test cbor_serialise_large_num() {
-  serialise(18446744073709551615) == #"c248ffffffffffffffff"
+  serialise(18446744073709551615) == #"1bffffffffffffffff"
 }
 
 test cbor_diagnostic_large_num() {