diff --git a/README.md b/README.md
index cc06a08..0bad97a 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,21 @@ $: pnpm i @maverick-js/signals
 $: yarn add @maverick-js/signals
 ```
 
+## Testing
+
+Effects are currently disabled server-side. In order to run effects during tests you'll need to
+configure your bundler's `conditions` field. The following example is for
+[Vitest](https://vitest.dev):
+
+```ts
+// vite.config.ts
+{
+  resolve: {
+    conditions: process.env.VITEST ? ['test'] : undefined,
+  }
+}
+```
+
 ## API
 
 - [`root`](#root)
diff --git a/package.json b/package.json
index fbfaf29..d4ec03d 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "version": "5.6.4",
   "type": "module",
   "types": "dist/types/index.d.ts",
+  "main": "dist/server/index.cjs",
   "module": "dist/prod/index.js",
   "sideEffects": false,
   "files": [
@@ -57,6 +58,7 @@
   "exports": {
     ".": {
       "import": {
+        "test": "./dist/dev/index.js",
         "node": "./dist/server/index.js",
         "deno": "./dist/server/index.js",
         "bun": "./dist/server/index.js",
@@ -67,6 +69,7 @@
     },
     "./map": {
       "import": {
+        "test": "./dist/dev/map.js",
         "node": "./dist/server/map.js",
         "deno": "./dist/server/map.js",
         "bun": "./dist/server/index.js",