diff --git a/build-constraints.yaml b/build-constraints.yaml
index 37642fe5..bd4ff0f8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4689,6 +4689,7 @@ skipped-tests:
     - hw-rankselect-base # via hspec-2.6.0
     - hw-streams # via hspec-2.6.0
     - clay # via hspec-discover-2.6.0
+    - focuslist # via genvalidity, see https://github.com/commercialhaskell/stackage/pull/4436#issuecomment-475110614
     # another batch for tasty 0.12
     - cborg # via tasty-1.2
     - ghc-prof # via tasty-1.2