diff --git a/build-constraints.yaml b/build-constraints.yaml
index e257e872..29f375ac 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1343,9 +1343,6 @@ expected-test-failures:
     # https://github.com/jberryman/directory-tree/issues/4
     - directory-tree
 
-    # https://github.com/ekmett/semigroupoids/issues/18
-    - semigroupoids
-
     # https://github.com/ndmitchell/hoogle/issues/101
     - hoogle