diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index f1dfc55ca2cb..bfbe731d000e 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -3129,6 +3129,21 @@ let
         };
       };
 
+      ms-vscode.test-adapter-converter = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "test-adapter-converter";
+          publisher = "ms-vscode";
+          version = "0.1.9";
+          sha256 = "sha256-M53jhAVawk2yCeSrLkWrUit3xbDc0zgCK2snbK+BaSs=";
+        };
+        meta = {
+          description = "A Visual Studio Code extension that converts from the Test Explorer UI API into native VS Code testing";
+          downloadPage = "https://marketplace.visualstudio.com/items?itemName=ms-vscode.test-adapter-converter";
+          homepage = "https://github.com/microsoft/vscode-test-adapter-converter";
+          license = lib.licenses.mit;
+        };
+      };
+
       ms-vscode.theme-tomorrowkit = buildVscodeMarketplaceExtension {
         mktplcRef = {
           name = "Theme-TomorrowKit";