diff --git a/package.json b/package.json
index 85fa378a..5acd8eff 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,13 @@
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
   "types": "dist/ts/index.d.ts",
+  "exports": {
+    "./is-test-runner": {
+      "import": "./src/is-test-runner/is-test-runner.mjs",
+      "browser": "./src/is-test-runner/is-test-runner.mjs",
+      "require": "./src/is-test-runner/is-test-runner.cjs"
+    }
+  },
   "files": [
     "bin",
     "dist/**/*",
diff --git a/src/is-test-runner/is-test-runner.cjs b/src/is-test-runner/is-test-runner.cjs
new file mode 100644
index 00000000..7212fa3e
--- /dev/null
+++ b/src/is-test-runner/is-test-runner.cjs
@@ -0,0 +1,6 @@
+/**
+ * Returns whether the story is rendering inside of the Storybook test runner.
+ */
+export function isTestRunner() {
+  return process?.env?.STORYBOOK_TEST_RUNNER === 'true';
+}
diff --git a/src/is-test-runner.ts b/src/is-test-runner/is-test-runner.mjs
similarity index 58%
rename from src/is-test-runner.ts
rename to src/is-test-runner/is-test-runner.mjs
index eb546e12..1907dec4 100644
--- a/src/is-test-runner.ts
+++ b/src/is-test-runner/is-test-runner.mjs
@@ -2,12 +2,9 @@
  * Returns whether the story is rendering inside of the Storybook test runner.
  */
 export function isTestRunner() {
-  const isTestRunnerInNode = process?.env?.STORYBOOK_TEST_RUNNER === 'true';
-  const isTestRunnerInBrowser = !!(
+  return!!(
     typeof window !== 'undefined' &&
     window &&
     window.navigator.userAgent.match(/StorybookTestRunner/)
   );
-
-  return isTestRunnerInNode || isTestRunnerInBrowser;
 }