diff --git a/karma.conf.cjs b/karma.conf.cjs
index b80ee7f..a6c93c9 100644
--- a/karma.conf.cjs
+++ b/karma.conf.cjs
@@ -3,7 +3,29 @@ process.env.CHROME_BIN = require("puppeteer").executablePath();
 const os = require("os");
 const path = require("path");
 
-const rollupConfig = import("./rollup.config.js");
+const { nodeResolve } = require("@rollup/plugin-node-resolve");
+const commonjs = require("@rollup/plugin-commonjs");
+const json = require("@rollup/plugin-json");
+
+const rollupConfig = {
+  input: {
+    index: "dist/index.js",
+  },
+  output: {
+    dir: "bundle",
+    format: "esm",
+  },
+  plugins: [
+    commonjs(),
+    json(),
+    nodeResolve({
+      browser: true,
+      preferBuiltins: false,
+      extensions: [".js", ".ts"],
+    }),
+  ],
+};
+
 
 const output = {
   path: path.join(os.tmpdir(), "_karma_webpack_") + Math.floor(Math.random() * 1000000),