diff --git a/README.md b/README.md
index 8a77883..51c2966 100644
--- a/README.md
+++ b/README.md
@@ -262,4 +262,4 @@ automatically generated when creating the service.  It can be replaced by a
 custom certificate by overwriting the `server.crt` and `server.key` files in
 `/var/lib/dokku/services/postgres/<DB_NAME>/data`.
 The `server.key` must be chmoded to 600 and must be owned by the postgres user
-or root.
\ No newline at end of file
+or root.
diff --git a/tests/service_destroy.bats b/tests/service_destroy.bats
index 4c1fc94..03f23c3 100755
--- a/tests/service_destroy.bats
+++ b/tests/service_destroy.bats
@@ -23,5 +23,5 @@ load test_helper
   dokku "$PLUGIN_COMMAND_PREFIX:link" l app
   run dokku "$PLUGIN_COMMAND_PREFIX:destroy" l
   assert_contains "${lines[*]}" "Cannot delete linked service"
-  rm "$DOKKU_ROOT/app" -rf
+  rm -rf "$DOKKU_ROOT/app"
 }