diff --git a/tests/golden/setattr_more b/tests/golden/setattr_more
index 0f57a44b..dd80461f 100644
--- a/tests/golden/setattr_more
+++ b/tests/golden/setattr_more
@@ -25,5 +25,7 @@ scoutfs: setattr failed: Invalid argument (22)
 Filesystem type is: 554f4353
 File size of /mnt/test/test/setattr_more/file is 40988672 (10007 blocks of 4096 bytes)
  ext:     logical_offset:        physical_offset: length:   expected: flags:
-   0:        0..   10239:          0..     10239:  10240:             unknown,eof
+   0:        0..   10006:          0..     10006:  10007:             unknown,eof
 /mnt/test/test/setattr_more/file: 1 extent found
+== correct offline extent length
+976563
diff --git a/tests/tests/setattr_more.sh b/tests/tests/setattr_more.sh
index 94257663..0aecd9be 100644
--- a/tests/tests/setattr_more.sh
+++ b/tests/tests/setattr_more.sh
@@ -61,4 +61,11 @@ scoutfs setattr -d 1 -o -s $((10007 * 4096)) -f "$FILE" 2>&1 | t_filter_fs
 filefrag -v -b4096 "$FILE" 2>&1 | t_filter_fs
 rm "$FILE"
 
+# had a bug where we were creating extents that were too long
+echo "== correct offline extent length"
+touch "$FILE"
+scoutfs setattr -d 1 -o -s 4000000000 -f "$FILE" 2>&1 | t_filter_fs
+scoutfs stat -s offline_blocks "$FILE"
+rm "$FILE"
+
 t_pass