diff --git a/build-constraints.yaml b/build-constraints.yaml
index c97497d9..97a8b279 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -9014,7 +9014,7 @@ expected-test-failures:
     - sqids
     - stateWriter # 0.4.0 https://github.com/bartavelle/stateWriter/issues/6
     - subcategories
-    # sydtest # https://github.com/commercialhaskell/stackage/issues/6729
+    - sydtest # https://github.com/commercialhaskell/stackage/issues/6729
     - sydtest-yesod # https://github.com/commercialhaskell/stackage/issues/6798
     - tasty-fail-fast
     - tasty-html # https://github.com/commercialhaskell/stackage/issues/6966