diff --git a/plugins/external.json b/plugins/external.json
index b683ce066..35c557a27 100644
--- a/plugins/external.json
+++ b/plugins/external.json
@@ -71,6 +71,24 @@
       "path": "plugins/dotnet-diag"
     }
   },
+  {
+    "name": "dotnet-test",
+    "description": "Skills for running, diagnosing, and migrating .NET tests: test execution, filtering, platform detection, and MSTest workflows.",
+    "version": "0.1.0",
+    "author": {
+      "name": "Microsoft",
+      "url": "https://www.microsoft.com"
+    },
+    "homepage": "https://github.com/dotnet/skills",
+    "keywords": ["dotnet", "testing", "mstest", "unit-testing", "test-migration", "test-generation", "coverage", "testability"],
+    "license": "MIT",
+    "repository": "https://github.com/dotnet/skills",
+    "source": {
+      "source": "github",
+      "repo": "dotnet/skills",
+      "path": "plugins/dotnet-test"
+    }
+  },
   {
   "name": "skills-for-copilot-studio",
   "description": "Microsoft Copilot Studio plugins for AI coding agents",