diff --git a/tests/qemu-iotests/103 b/tests/qemu-iotests/103
index ecbd8ebd71..d0cfab8844 100755
--- a/tests/qemu-iotests/103
+++ b/tests/qemu-iotests/103
@@ -40,6 +40,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 _supported_fmt qcow2
 _supported_proto file nfs
 _supported_os Linux
+# Internal snapshots are (currently) impossible with refcount_bits=1
+_unsupported_imgopts 'refcount_bits=1[^0-9]'
 
 IMG_SIZE=64K