diff --git a/tests/qemu-iotests/024 b/tests/qemu-iotests/024
index 9bf99e198a..2c2d14846d 100755
--- a/tests/qemu-iotests/024
+++ b/tests/qemu-iotests/024
@@ -60,16 +60,22 @@ CLUSTER_SIZE=65536
 echo "Creating backing file"
 echo
 
+TEST_IMG_SAVE="$TEST_IMG"
+TEST_IMG="$TEST_IMG.base_old"
+
 _make_test_img 1G
 io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11
-mv "$TEST_IMG" "$TEST_IMG.base_old"
+
+TEST_IMG="$TEST_IMG_SAVE.base_new"
 
 echo "Creating new backing file"
 echo
 
 _make_test_img 1G
 io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22
-mv "$TEST_IMG" "$TEST_IMG.base_new"
+
+
+TEST_IMG="$TEST_IMG_SAVE"
 
 echo "Creating COW image"
 echo
diff --git a/tests/qemu-iotests/024.out b/tests/qemu-iotests/024.out
index 9b9ef3a341..33cfaf5cfc 100644
--- a/tests/qemu-iotests/024.out
+++ b/tests/qemu-iotests/024.out
@@ -1,7 +1,7 @@
 QA output created by 024
 Creating backing file
 
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+Formatting 'TEST_DIR/t.IMGFMT.base_old', fmt=IMGFMT size=1073741824
 === IO: pattern 0x11
 wrote 65536/65536 bytes at offset 0
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -21,7 +21,7 @@ wrote 65536/65536 bytes at offset 917504
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 Creating new backing file
 
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+Formatting 'TEST_DIR/t.IMGFMT.base_new', fmt=IMGFMT size=1073741824
 === IO: pattern 0x22
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)