diff --git a/build-constraints.yaml b/build-constraints.yaml
index 67731459..09f7d8dc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6152,6 +6152,8 @@ expected-test-failures:
 
     - sbv
 
+    - speculate
+
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run