diff --git a/build-constraints.yaml b/build-constraints.yaml
index 41099298..dfe5c99a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3758,6 +3758,7 @@ expected-test-failures:
     - text-ldap # https://github.com/khibino/haskell-text-ldap/issues/1
     - text-show # https://github.com/fpco/stackage/issues/2436
     - thyme # https://github.com/liyang/thyme/issues/50
+    - tls # https://github.com/vincenthz/hs-tls/issues/247
     - tries # https://github.com/athanclark/tries/issues/2
     - vector-algorithms # http://hub.darcs.net/dolio/vector-algorithms/issue/9
     - wai-middleware-content-type # 0.4.1 - https://github.com/athanclark/wai-middleware-content-type/issues/2