diff --git a/build-constraints.yaml b/build-constraints.yaml
index 625f865b..a8b661ff 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2026,6 +2026,9 @@ expected-test-failures:
     # https://github.com/alcidesv/second-transfer/issues/3
     - second-transfer
 
+    # https://github.com/jaspervdj/websockets/issues/104
+    - websockets
+
 # end of expected-test-failures