diff --git a/pkgs/development/tools/misc/highlight-assertions/default.nix b/pkgs/development/tools/misc/highlight-assertions/default.nix
new file mode 100644
index 000000000000..8d2aabe4bf5c
--- /dev/null
+++ b/pkgs/development/tools/misc/highlight-assertions/default.nix
@@ -0,0 +1,25 @@
+{ lib, rustPlatform, fetchFromGitHub }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "highlight-assertions";
+  version = "unstable-2022-11-24";
+
+  src = fetchFromGitHub {
+    owner = "thehamsta";
+    repo = pname;
+    rev = "c738a51513285ded4fc16d68afcdb77761543f92";
+    sha256 = "sha256-vYXr0xFwRUwSEP++834A/4M1QB14Wx+qWwB9PUtn3uA=";
+  };
+
+  cargoSha256 = "sha256-sezjd7tmVVDoRsrsTK2zKjHmrBcAQDHyHd/dR1q1za0=";
+
+  # requires nightly features
+  RUSTC_BOOTSTRAP = 1;
+
+  meta = with lib; {
+    description = "A tool for unit testing tree sitter highlights for nvim-treesitter";
+    homepage = "https://github.com/thehamsta/highlight-assertions";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ figsoda ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 00bf151fb526..91fb6ba3ccfa 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17476,6 +17476,8 @@ with pkgs;
 
   heroku = callPackage ../development/tools/heroku { };
 
+  highlight-assertions = callPackage ../development/tools/misc/highlight-assertions { };
+
   ccloud-cli = callPackage ../development/tools/ccloud-cli { };
 
   confluent-cli = callPackage ../development/tools/confluent-cli { };