diff --git a/README.md b/README.md
index 39605c0e..2df22966 100644
--- a/README.md
+++ b/README.md
@@ -184,6 +184,19 @@ The local client will copy the files directly to the client. This is useful if B
 buildctl build ... --output type=local,dest=path/to/output-dir
 ```
 
+Another use case is to export test result file from the docker image.
+```dockerfile
+...
+FROM scratch as testresult
+
+COPY --from=builder /usr/src/app/testresult.xml .
+...
+```
+
+```
+buildctl build ... --opt target=testresult --output type=local,dest=path/to/output-dir
+```
+
 Tar exporter is similar to local exporter but transfers the files through a tarball.
 
 ```