diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6990fd1f..ae2be606 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3636,6 +3636,9 @@ skipped-tests:
     # https://github.com/google/proto-lens/issues/119
     - proto-lens-combinators
 
+    # https://github.com/brunjlar/pell/issues/1
+    - pell
+
 # end of skipped-tests
 
 # Tests which we should build and run, but which are expected to fail. We