diff --git a/build-constraints.yaml b/build-constraints.yaml
index e005e658..8a18a385 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7831,6 +7831,7 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/8089
         - megaparsec < 9.8
+        - megaparsec-tests < 9.8.1
 
         # https://github.com/commercialhaskell/stackage/issues/7857
         # QuickCheck < 2.17.0.0