diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6f3c37e4..0f2fb515 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3863,6 +3863,9 @@ expected-benchmark-failures:
     # wrong package.yaml file
     - teardown # https://github.com/roman/Haskell-teardown/issues/1
 
+    # https://github.com/harendra-kumar/unicode-transforms/issues/16
+    - unicode-transforms
+
 # end of expected-benchmark-failures