diff --git a/src/partition/test-repart.sh b/src/partition/test-repart.sh
index 8b1ec6c4c1..5765978290 100755
--- a/src/partition/test-repart.sh
+++ b/src/partition/test-repart.sh
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -ex
 
+[[ -f /dev/loop-control ]] || exit 77
+
 repart=$1
 test -x $repart