@@ -31,10 +31,7 @@
   "homepage": "https://mochajs.org/",
   "logo": "https://cldup.com/S9uQ-cOLYz.svg",
   "notifyLogo": "https://ibin.co/4QuRuGjXvl36.png",
-  "exports": {
-    ".": "./index.js",
-    "./*": "./*"
-  },
+  "main": "./index.js",
   "bin": {
     "mocha": "./bin/mocha.js"
   },
 
@@ -5,46 +5,72 @@ const os = require("node:os");
 const path = require("node:path");
 const { invokeNode } = require("./helpers.cjs");
 
+async function invokeNodeWithLinkedMocha(args) {
+  const repoRoot = path.resolve(__dirname, "..", "..");
+  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "mocha-package-root-"));
+  const packageDir = path.join(tempDir, "node_modules", "mocha");
+
+  fs.mkdirSync(path.dirname(packageDir), { recursive: true });
+
+  try {
+    if (process.platform === "win32") {
+      fs.symlinkSync(repoRoot, packageDir, "junction");
+    } else {
+      fs.symlinkSync(repoRoot, packageDir);
+    }
+
+    return await new Promise((resolve, reject) => {
+      invokeNode(
+        args,
+        (err, res) => {
+          if (err) {
+            reject(err);
+            return;
+          }
+          resolve(res);
+        },
+        { cwd: tempDir, stdio: ["ignore", "pipe", "pipe"] },
+      );
+    });
+  } finally {
+    fs.rmSync(tempDir, { recursive: true, force: true });
+  }
+}
+
 describe("package entrypoint", function () {
   it("should resolve the package root without DEP0151 warnings", async function () {
-    const repoRoot = path.resolve(__dirname, "..", "..");
-    const tempDir = fs.mkdtempSync(
-      path.join(os.tmpdir(), "mocha-package-root-"),
-    );
-    const packageDir = path.join(tempDir, "node_modules", "mocha");
-
-    fs.mkdirSync(path.dirname(packageDir), { recursive: true });
-
-    try {
-      if (process.platform === "win32") {
-        fs.symlinkSync(repoRoot, packageDir, "junction");
-      } else {
-        fs.symlinkSync(repoRoot, packageDir);
-      }
-
-      const result = await new Promise((resolve, reject) => {
-        invokeNode(
-          [
-            "--input-type=module",
-            "-e",
-            "import {describe, it} from 'mocha'; console.log(typeof describe, typeof it);",
-          ],
-          (err, res) => {
-            if (err) {
-              reject(err);
-              return;
-            }
-            resolve(res);
-          },
-          { cwd: tempDir, stdio: ["ignore", "pipe", "pipe"] },
-        );
-      });
-
-      expect(result.code, "to be", 0);
-      expect(result.output, "to contain", "function function");
-      expect(result.output, "not to contain", "DEP0151");
-    } finally {
-      fs.rmSync(tempDir, { recursive: true, force: true });
-    }
+    const result = await invokeNodeWithLinkedMocha([
+      "--input-type=module",
+      "-e",
+      "import {describe, it} from 'mocha'; console.log(typeof describe, typeof it);",
+    ]);
+
+    expect(result.code, "to be", 0);
+    expect(result.output, "to contain", "function function");
+    expect(result.output, "not to contain", "DEP0151");
+  });
+
+  it("should resolve deep subpaths without a file extension", async function () {
+    const result = await invokeNodeWithLinkedMocha([
+      "-e",
+      "require.resolve('mocha/lib/reporters/base');" +
+        "require.resolve('mocha/lib/stats-collector');" +
+        "console.log('resolved deep subpaths');",
+    ]);
+
+    expect(result.code, "to be", 0);
+    expect(result.output, "to contain", "resolved deep subpaths");
+  });
+
+  it("should resolve deep subpaths with a file extension", async function () {
+    const result = await invokeNodeWithLinkedMocha([
+      "-e",
+      "require.resolve('mocha/lib/reporters/base.js');" +
+        "require.resolve('mocha/lib/stats-collector.js');" +
+        "console.log('resolved deep subpaths');",
+    ]);
+
+    expect(result.code, "to be", 0);
+    expect(result.output, "to contain", "resolved deep subpaths");
   });
 });