diff --git a/pkgs/by-name/st/stalwart-mail/package.nix b/pkgs/by-name/st/stalwart-mail/package.nix
index 2519b43e8e0b..7c442b483ad0 100644
--- a/pkgs/by-name/st/stalwart-mail/package.nix
+++ b/pkgs/by-name/st/stalwart-mail/package.nix
@@ -136,6 +136,10 @@ rustPlatform.buildRustPackage rec {
     "--skip=smtp::inbound::antispam::antispam"
     # Failed to read system DNS config: io error: No such file or directory (os error 2)
     "--skip=smtp::inbound::vrfy::vrfy_expn"
+    # thread 'smtp::management::queue::manage_queue' panicked at tests/src/smtp/inbound/mod.rs:45:23:
+    # No queue event received.
+    # NOTE: Test unreliable on high load systems
+    "--skip=smtp::management::queue::manage_queue"
   ];
 
   doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);