diff --git a/pkgs/development/python-modules/re-assert/default.nix b/pkgs/development/python-modules/re-assert/default.nix
new file mode 100644
index 00000000000..9cf32d79802
--- /dev/null
+++ b/pkgs/development/python-modules/re-assert/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, regex
+}:
+
+buildPythonPackage rec {
+  pname = "re_assert";
+  version = "1.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "5172dfbd2047a15dff2347735dea7e495479cc7e58841199a4a4973256b20464";
+  };
+
+  # No tests in archive
+  doCheck = false;
+
+  propagatedBuildInputs = [
+    regex
+  ];
+
+  meta = {
+    description = "Show where your regex match assertion failed";
+    license = lib.licenses.mit;
+    homepage = "https://github.com/asottile/re-assert";
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a549b86df07..afa3972bc4d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6223,6 +6223,8 @@ in {
 
   rdflib-jsonld = callPackage ../development/python-modules/rdflib-jsonld { };
 
+  re-assert = callPackage ../development/python-modules/re-assert { };
+
   readchar = callPackage ../development/python-modules/readchar { };
 
   readme = callPackage ../development/python-modules/readme { };