diff --git a/build-constraints.yaml b/build-constraints.yaml
index bdb6678b..590b07f3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8307,6 +8307,7 @@ skipped-tests:
     # Due to cycles, which are actually just limitations in Stack right now.
     - HUnit
     - Agda
+    - HMock
     - aeson
     - indexed-traversable-instances
     - semialign