diff --git a/build-constraints.yaml b/build-constraints.yaml
index b6aea3c4..6df16c4a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7444,6 +7444,7 @@ expected-test-failures:
     - debian
     - dhall-yaml # https://github.com/commercialhaskell/stackage/issues/5640
     - dimensional
+    - doctest-parallel # https://github.com/commercialhaskell/stackage/issues/6380
     - download # https://github.com/fpco/stackage/issues/2811
     - duration
     - ede