diff --git a/pkgs/development/python-modules/unittest-data-provider/default.nix b/pkgs/development/python-modules/unittest-data-provider/default.nix
deleted file mode 100644
index 8a0670fa6e2c..000000000000
--- a/pkgs/development/python-modules/unittest-data-provider/default.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  buildPythonPackage,
-  lib,
-  fetchPypi,
-}:
-
-buildPythonPackage rec {
-  version = "1.0.1";
-  format = "setuptools";
-  pname = "unittest-data-provider";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "1gn2ka4vqpayx4cpbp8712agqjh3wdpk9smdxnp709ccc2v7zg46";
-  };
-
-  meta = {
-    description = "PHPUnit-like @dataprovider decorator for unittest";
-    homepage = "https://github.com/yourlabs/unittest-data-provider";
-    license = lib.licenses.mit;
-    maintainers = [ ];
-  };
-}
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index a7520ae5352d..a955635c4354 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -616,6 +616,7 @@ mapAliases {
   ufoLib2 = throw "'ufoLib2' has been renamed to/replaced by 'ufolib2'"; # Converted to throw 2025-10-29
   unicode-slugify = throw "'unicode-slugify' has been removed becaues it was broken and unmaintained. Consider using 'python-slugify' instead."; # added 2025-10-05
   unifi = throw "'unifi' has been removed as upstream was archived in 2017"; # Added 2025-08-25
+  unittest-data-provider = throw "'unittest-data-provider' has been removed as it was unused, unmaintained, and upstream suggests 'pytest parameterize' instead."; # Added 2026-05-22
   update_checker = throw "'update_checker' has been renamed to/replaced by 'update-checker'"; # Converted to throw 2025-10-29
   vcver = throw "vcver has been removed, since it was an unused leaf package"; # added 2025-08-25
   vega_datasets = throw "'vega_datasets' has been renamed to/replaced by 'vega-datasets'"; # Converted to throw 2025-10-29
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bc55a388cec7..89dc567da3b0 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -20826,8 +20826,6 @@ self: super: with self; {
     inherit (pkgs) units-llnl;
   };
 
-  unittest-data-provider = callPackage ../development/python-modules/unittest-data-provider { };
-
   unittest-xml-reporting = callPackage ../development/python-modules/unittest-xml-reporting { };
 
   univers = callPackage ../development/python-modules/univers { };