diff --git a/build-constraints.yaml b/build-constraints.yaml
index 28ae0c0c..ca616988 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8152,6 +8152,7 @@ expected-test-failures:
     - symbolize # 1.0.3.1 https://github.com/Qqwy/haskell-symbolize/issues/12
     - tar-conduit # https://github.com/snoyberg/tar-conduit/issues/33
     - unicode-data # 0.6.0 https://github.com/composewell/unicode-data/issues/137
+    - uri-templater # 1.0.0.1 https://github.com/iand675/uri-templater/issues/18
     - vary # 0.1.1.3 doctest-0.4
 
     # Intermittent failures or unreliable. These tests may pass when