diff --git a/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix b/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
index 8064aa620a5e..9471af6c6c94 100644
--- a/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
+++ b/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
@@ -84,6 +84,8 @@ buildPythonPackage rec {
     "test_vector_search_with_filters"
     "test_vector_search_pagination"
     "test_vector_search_edge_cases"
+    # Flaky under a parallel build (database in use)
+    "test_store_ttl"
   ];
 
   pythonImportsCheck = [ "langgraph.checkpoint.postgres" ];