diff --git a/pkgs/development/python-modules/certauth/default.nix b/pkgs/development/python-modules/certauth/default.nix
index b789fe5d16f8..04a4637bafc9 100644
--- a/pkgs/development/python-modules/certauth/default.nix
+++ b/pkgs/development/python-modules/certauth/default.nix
@@ -4,20 +4,29 @@
 , pyopenssl
 , tldextract
 , pytestCheckHook
-, pytest-cov
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "certauth";
   version = "1.3.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "ikreymer";
     repo = "certauth";
-    rev = "ad2bae5d40a9e45519fc1f2cd7678174bbc55b3d"; # Repo has no git tags
+    # Repo has no git tags, https://github.com/ikreymer/certauth/issues/15
+    rev = "ad2bae5d40a9e45519fc1f2cd7678174bbc55b3d";
     hash = "sha256-Rso5N0jb9k7bdorjPIUMNiZZPnzwbkxFNiTpsJ9pco0=";
   };
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "--cov certauth " ""
+  '';
+
   propagatedBuildInputs = [
     pyopenssl
     tldextract
@@ -25,10 +34,20 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [
     pytestCheckHook
-    pytest-cov
   ];
 
-  pythonImportsCheck = [ "certauth" ];
+  pythonImportsCheck = [
+    "certauth"
+  ];
+
+  disabledTests = [
+    # Tests want to download Public Suffix List
+    "test_file_wildcard"
+    "test_file_wildcard_subdomains"
+    "test_in_mem_parent_wildcard_cert"
+    "test_in_mem_parent_wildcard_cert_at_tld"
+    "test_in_mem_parent_wildcard_cert_2"
+  ];
 
   meta = with lib; {
     description = "Simple CertificateAuthority and host certificate creation, useful for man-in-the-middle HTTPS proxy";