diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 6d020246..2dd13106 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -90,13 +90,15 @@ jobs:
 
       - name: Run tests for webpack version ${{ matrix.webpack-version }}
         run: npm run test:coverage -- --ci
+        env:
+          EXPERIMENTAL_USE_IMPORT_MODULE: "false"
 
       - name: Submit coverage data to codecov
         uses: codecov/codecov-action@v1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
 
-  test2:
+  test-new-api:
     name: Test - ${{ matrix.os }} - Node v${{ matrix.node-version }}, Webpack latest, experimentalUseImportModule
 
     strategy:
diff --git a/test/TestCases.test.js b/test/TestCases.test.js
index 256bbcbc..9a3cb78b 100644
--- a/test/TestCases.test.js
+++ b/test/TestCases.test.js
@@ -9,6 +9,8 @@ import webpack from "webpack";
 
 import Self from "../src/index";
 
+import yn from "./helpers/yn";
+
 function clearDirectory(dirPath) {
   let files;
 
@@ -128,9 +130,12 @@ describe("TestCases", () => {
                 config.plugins.map((p) => {
                   if (p.constructor === Self) {
                     const { options } = p;
-                    options.experimentalUseImportModule =
-                      !!process.env.EXPERIMENTAL_USE_IMPORT_MODULE;
+
+                    options.experimentalUseImportModule = yn(
+                      process.env.EXPERIMENTAL_USE_IMPORT_MODULE
+                    );
                   }
+
                   return p;
                 }),
             },
@@ -192,7 +197,9 @@ describe("TestCases", () => {
           const expectedDirectoryByVersion = path.join(
             expectedDirectory,
             `webpack-${webpack.version[0]}${
-              process.env.EXPERIMENTAL_USE_IMPORT_MODULE ? "-importModule" : ""
+              yn(process.env.EXPERIMENTAL_USE_IMPORT_MODULE)
+                ? "-importModule"
+                : ""
             }`
           );
 
diff --git a/test/cases/auxiliary-assets/test.filter.js b/test/cases/auxiliary-assets/test.filter.js
index d04b7de0..c51829af 100644
--- a/test/cases/auxiliary-assets/test.filter.js
+++ b/test/cases/auxiliary-assets/test.filter.js
@@ -1 +1,3 @@
-module.exports = () => !process.env.EXPERIMENTAL_USE_IMPORT_MODULE;
+import yn from "../../helpers/yn";
+
+module.exports = () => !yn(process.env.EXPERIMENTAL_USE_IMPORT_MODULE);
diff --git a/test/helpers/yn.js b/test/helpers/yn.js
new file mode 100644
index 00000000..9834ac74
--- /dev/null
+++ b/test/helpers/yn.js
@@ -0,0 +1,13 @@
+function yn(value, defaultValue = false) {
+  if (/^(?:y|yes|true|1|on)$/i.test(value)) {
+    return true;
+  }
+
+  if (/^(?:n|no|false|0|off)$/i.test(value)) {
+    return false;
+  }
+
+  return defaultValue;
+}
+
+module.exports = yn;