diff --git a/pkgs/development/python-modules/devolo-plc-api/default.nix b/pkgs/development/python-modules/devolo-plc-api/default.nix
index ea41e6ed4b79..4fbc0f06fc43 100644
--- a/pkgs/development/python-modules/devolo-plc-api/default.nix
+++ b/pkgs/development/python-modules/devolo-plc-api/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , httpx
 , protobuf
 , pytest-asyncio
@@ -38,7 +39,6 @@ buildPythonPackage rec {
     zeroconf
   ];
 
-
   checkInputs = [
     pytest-asyncio
     pytest-httpx
@@ -46,6 +46,8 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+
+
   pythonImportsCheck = [
     "devolo_plc_api"
   ];
diff --git a/pkgs/development/python-modules/pyrmvtransport/default.nix b/pkgs/development/python-modules/pyrmvtransport/default.nix
index b8104ef23707..e76152e218d4 100644
--- a/pkgs/development/python-modules/pyrmvtransport/default.nix
+++ b/pkgs/development/python-modules/pyrmvtransport/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , pythonOlder
 , flit
 , async-timeout
@@ -41,6 +42,15 @@ buildPythonPackage rec {
     pytest-httpx
   ];
 
+  patches = [
+    # Can be removed with next release, https://github.com/cgtobi/PyRMVtransport/pull/55
+    (fetchpatch {
+      name = "update-tests.patch";
+      url = "https://github.com/cgtobi/PyRMVtransport/commit/fe93b3d9d625f9ccf8eb7b0c39e0ff41c72d2e77.patch";
+      sha256 = "sha256-t+GP5VG1S86vVSsisl85ZHBtOqxIi7QS83DA+HgRet4=";
+    })
+  ];
+
   pythonImportsCheck = [
     "RMVtransport"
   ];