diff --git a/pkgs/development/python-modules/zigpy-znp/default.nix b/pkgs/development/python-modules/zigpy-znp/default.nix
index 618ada6fbbad..7efb2dbcdce9 100644
--- a/pkgs/development/python-modules/zigpy-znp/default.nix
+++ b/pkgs/development/python-modules/zigpy-znp/default.nix
@@ -59,6 +59,12 @@ buildPythonPackage rec {
 
   pytestFlags = [ "--reruns=3" ];
 
+  disabledTests = [
+    # broken by https://github.com/zigpy/zigpy/pull/1635
+    "test_concurrency_auto_config"
+    "test_request_concurrency"
+  ];
+
   pythonImportsCheck = [ "zigpy_znp" ];
 
   meta = with lib; {