diff --git a/pkgs/development/python-modules/semver/default.nix b/pkgs/development/python-modules/semver/default.nix
index 9a309d1e3b94..21aa41d80053 100644
--- a/pkgs/development/python-modules/semver/default.nix
+++ b/pkgs/development/python-modules/semver/default.nix
@@ -1,17 +1,19 @@
-{ stdenv, fetchPypi, buildPythonPackage }:
+{ stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   name = "${pname}-${version}";
   pname = "semver";
   version = "2.7.9";
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "1ffb55fb86a076cf7c161e6b5931f7da59f15abe217e0f24cea96cc8eec50f42";
+  src = fetchFromGitHub {
+    owner = "k-bx";
+    repo = "python-semver";
+    rev = "2001c62d1a0361c44acc7076d8ce91e1d1c66141"; # not tagged in repository
+    sha256 = "01c05sv97dyr672sa0nr3fnh2aqbmvkfw19d6rkaj16h2sdsyg0i";
   };
 
-  # No tests in archive
-  doCheck = false;
+  checkInputs = [ pytest ];
+  checkPhase = "pytest -v tests.py";
 
   meta = with stdenv.lib; {
     description = "Python package to work with Semantic Versioning (http://semver.org/)";