diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1610e7ea..5620404c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -68,7 +68,7 @@ pnpm link -—global @anthropic-ai/sdk
 Most tests require you to [set up a mock server](https://github.com/stoplightio/prism) against the OpenAPI spec to run the tests.
 
 ```bash
-npx prism path/to/your/openapi.yml
+npx prism mock path/to/your/openapi.yml
 ```
 
 ```bash