diff --git a/packages/bun/README.md b/packages/bun/README.md
index a9cf8f61a..b45339ed8 100644
--- a/packages/bun/README.md
+++ b/packages/bun/README.md
@@ -24,3 +24,12 @@ bun install @deepkit/type @deepkit/type-compiler @deepkit/core @deepkit/bun type
     "reflection": true
 }
 ```
+
+## Bun test runner
+
+To use the [bun test runner](https://bun.sh/docs/cli/test) instead of Jest add the following to file `bunfig.toml`:
+
+```toml
+[test]
+preload = ["@deepkit/bun"]
+```