diff --git a/build-constraints.yaml b/build-constraints.yaml
index 41277830..cac05c23 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8541,6 +8541,7 @@ expected-test-failures:
     - record-wrangler # 0.1.1.0
     - secp256k1-haskell # #5948/closed
     - serialise # 0.2.6.1 https://github.com/well-typed/cborg/issues/344
+    - servant-client # 0.20.2 https://github.com/haskell-servant/servant/issues/1818
     - servant-http-streams # 0.20.2 https://github.com/haskell-servant/servant/issues/1817
     - servant-static-th # 1.0.0.1 https://github.com/cdepillabout/servant-static-th/issues/21
     - thread-supervisor # 0.2.0.0