diff --git a/README.md b/README.md
index 6e5a2fa..84b12b0 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ docker run --rm jeanberu/swagger-cli
 Validate schema from URL or a file.
 ```shell script
 docker run --rm jeanberu/swagger-cli swagger-cli validate YOUR_URL
-docker run --rm jeanberu/swagger-cli swagger-cli validate YOUR_FILE
+docker run --rm -v $PWD/YOUR_FILE.yaml:/swagger.yaml jeanberu/swagger-cli swagger-cli validate swagger.yaml
 ```
 
 ## More help ?
diff --git a/test.yaml b/test.yaml
new file mode 100644
index 0000000..843fc9e
--- /dev/null
+++ b/test.yaml
@@ -0,0 +1,2 @@
+a:
+        b: test