diff --git a/build-constraints.yaml b/build-constraints.yaml
index 67ce749c..3295181c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1501,6 +1501,9 @@ expected-test-failures:
     # Requires memcached on the server
     - memcached-binary
 
+    # Requires redis on the build machine
+    - serversession-backend-redis
+
 # Haddocks which are expected to fail. Same concept as expected test failures.
 expected-haddock-failures:
     # https://github.com/acw/bytestring-progress/issues/4