diff --git a/pkgs/development/python-modules/fastmcp/default.nix b/pkgs/development/python-modules/fastmcp/default.nix
index 3879e40bb830..43f7c474f2dc 100644
--- a/pkgs/development/python-modules/fastmcp/default.nix
+++ b/pkgs/development/python-modules/fastmcp/default.nix
@@ -114,6 +114,11 @@ buildPythonPackage (finalAttrs: {
     "test_multi_server"
     "test_server_starts_without_auth"
     "test_canonical_multi_client_with_transforms"
+
+    # RuntimeError: Attempted to exit a cancel scope that isn't the current tasks's current cancel scope
+    "test_stateful_proxy"
+    "test_concurrent_log_requests_no_mixing"
+    "test_multi_proxies_no_mixing"
   ]
   ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     # floating point error