diff --git a/build-constraints.yaml b/build-constraints.yaml
index 22a2fdf1..3987c705 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2986,6 +2986,7 @@ expected-test-failures:
     - tries # https://github.com/athanclark/tries/issues/2
     - wai-middleware-content-type # 0.4.1 - https://github.com/athanclark/wai-middleware-content-type/issues/2
     - xmlgen # https://github.com/skogsbaer/xmlgen/issues/6
+    - Spock-core # https://github.com/agrafix/Spock/issues/102
 
     # Misc.
     - distributed-process-supervisor # # https://github.com/haskell-d