diff --git a/build-constraints.yaml b/build-constraints.yaml
index 09fba0e1..b0320850 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1181,6 +1181,9 @@ expected-test-failures:
     # Requires running server
     - consul-haskell
 
+    # https://github.com/timjb/aeson-schema/issues/9
+    - aeson-schema
+
 # Haddocks which are expected to fail. Same concept as expected test failures.
 expected-haddock-failures:
     # https://github.com/acw/bytestring-progress/issues/4