diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9f4cc2ea..54b56d34 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3825,7 +3825,6 @@ skipped-tests:
 expected-test-failures:
 
     # GHC 8.4
-    - concurrent-extra # https://github.com/basvandijk/concurrent-extra/issues/12
     - doctest # https://github.com/sol/doctest/issues/198
 
     # Intermittent failures or unreliable. These tests may pass when