diff --git a/pkgs/development/python-modules/aio-geojson-geonetnz-volcano/default.nix b/pkgs/development/python-modules/aio-geojson-geonetnz-volcano/default.nix
index 3ba2b430801e..618735527ae8 100644
--- a/pkgs/development/python-modules/aio-geojson-geonetnz-volcano/default.nix
+++ b/pkgs/development/python-modules/aio-geojson-geonetnz-volcano/default.nix
@@ -2,9 +2,10 @@
 , aio-geojson-client
 , aiohttp
 , aresponses
-, asynctest
+, mock
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , pytest-asyncio
 , pytestCheckHook
 , pytz
@@ -21,10 +22,19 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "exxamalte";
     repo = "python-aio-geojson-geonetnz-volcano";
-    rev = "v${version}";
+    rev = "refs/tags/v${version}";
     sha256 = "sha256-2iVUHMk4ydmGmmGS6lJV5pvxJHyP9bRSeh/dOXbquE0=";
   };
 
+  patches = [
+    # Remove asynctest, https://github.com/exxamalte/python-aio-geojson-geonetnz-volcano/pull/18
+    (fetchpatch {
+      name = "remove-asynctest.patch";
+      url = "https://github.com/exxamalte/python-aio-geojson-geonetnz-volcano/commit/d04a488130375c78efa541fd63a5d88bd6b0fd49.patch";
+      hash = "sha256-ArG8CovJckzzNebd03WeU5i/jPqy2HRVBL3ICk5nZ5Y=";
+    })
+  ];
+
   propagatedBuildInputs = [
     aio-geojson-client
     aiohttp
@@ -33,7 +43,7 @@ buildPythonPackage rec {
 
   checkInputs = [
     aresponses
-    asynctest
+    mock
     pytest-asyncio
     pytestCheckHook
   ];
@@ -45,6 +55,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python module for accessing the GeoNet NZ Volcanic GeoJSON feeds";
     homepage = "https://github.com/exxamalte/pythonaio-geojson-geonetnz-volcano";
+    changelog = "https://github.com/exxamalte/python-aio-geojson-geonetnz-volcano/blob/v${version}/CHANGELOG.md";
     license = with licenses; [ asl20 ];
     maintainers = with maintainers; [ fab ];
   };