diff --git a/scripts/test-projects.test-support.mjs b/scripts/test-projects.test-support.mjs
index 6853eeb0cf06..37a4b4a76ca3 100644
--- a/scripts/test-projects.test-support.mjs
+++ b/scripts/test-projects.test-support.mjs
@@ -990,6 +990,7 @@ const TOOLING_SOURCE_TEST_TARGETS = new Map([
     ["test/scripts/code-mode-namespace-live.test.ts", "test/scripts/docker-build-helper.test.ts"],
   ],
   ["scripts/lib/extension-test-plan.mjs", ["test/scripts/test-extension.test.ts"]],
+  ["scripts/lib/extension-vitest-paths.mjs", ["test/scripts/test-extension.test.ts"]],
   ["scripts/lib/vitest-batch-runner.mjs", ["test/scripts/test-extension.test.ts"]],
   ["scripts/lib/ci-node-test-plan.mjs", ["test/scripts/ci-node-test-plan.test.ts"]],
   [
diff --git a/test/scripts/test-projects.test.ts b/test/scripts/test-projects.test.ts
index c303115cbb7e..4247e972a020 100644
--- a/test/scripts/test-projects.test.ts
+++ b/test/scripts/test-projects.test.ts
@@ -1444,6 +1444,7 @@ describe("scripts/test-projects changed-target routing", () => {
         ["test/scripts/bundled-plugin-build-entries.test.ts", "test/release-check.test.ts"],
       ],
       ["scripts/lib/changed-extensions.mjs", ["test/scripts/test-extension.test.ts"]],
+      ["scripts/lib/extension-vitest-paths.mjs", ["test/scripts/test-extension.test.ts"]],
     ]);
 
     for (const [source, targets] of expectedTargets) {