diff --git a/build-constraints.yaml b/build-constraints.yaml
index 71181b41..f4453999 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1448,7 +1448,6 @@ skipped-tests:
     - heaps
     - hyphenation
     - machines
-    - semigroupoids
     - fixed-vector
 
     # https://github.com/kaizhang/clustering/issues/2
@@ -1720,9 +1719,6 @@ expected-test-failures:
     - bitcoin-api
     - bitcoin-api-extra
 
-    # https://github.com/ekmett/semigroupoids/issues/34
-    - semigroupoids
-
     # https://github.com/kazu-yamamoto/dns/issues/29
     - dns