diff --git a/build-constraints.yaml b/build-constraints.yaml
index 690a0b634..2d0674fc4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8746,6 +8746,7 @@ expected-test-failures:
     - oeis2 # 1.0.8 - To rerun use: --match "/Test for lookupSeq/Get Maple function/" --seed 1679058605
     - pvar # 1.0.0.0 ghc-9.6
     - sydtest # 0.15.1.1
+    - sydtest-yesod # 0.3.0.2 https://github.com/NorfairKing/sydtest/issues/101
     - tar-conduit # https://github.com/snoyberg/tar-conduit/issues/33
 
     # Intermittent failures or unreliable. These tests may pass when