diff --git a/configs-examples/ceph_raw.yaml b/configs-examples/ceph_raw.yaml
index 9520a2f..27e7cf4 100644
--- a/configs-examples/ceph_raw.yaml
+++ b/configs-examples/ceph_raw.yaml
@@ -20,4 +20,4 @@
         cfg: ceph
         params:
             FILENAME: /dev/rbd/rbd/${RBD_DEV_NAME_OR_LINK}
-            FILESIZE: ${FILESIZE}
+            TEST_FILE_SIZE: ${FILESIZE}