diff --git a/tests/fsck-tests/015-tree-reloc-tree/test.sh b/tests/fsck-tests/015-tree-reloc-tree/test.sh
deleted file mode 100755
index 5d9d5122..00000000
--- a/tests/fsck-tests/015-tree-reloc-tree/test.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-# Make sure btrfs check won't report any false alerts for valid image with
-# reloc tree.
-#
-# Also due to the short life span of reloc tree, save the as dump example for
-# later usage.
-
-source "$TEST_TOP/common"
-
-check_prereq btrfs
-
-check_image() {
-	run_check "$TOP/btrfs" check "$1"
-}
-
-check_all_images
diff --git a/tests/fsck-tests/020-extent-ref-cases/test.sh b/tests/fsck-tests/020-extent-ref-cases/test.sh
index a1bf75b1..e7a55728 100755
--- a/tests/fsck-tests/020-extent-ref-cases/test.sh
+++ b/tests/fsck-tests/020-extent-ref-cases/test.sh
@@ -14,6 +14,11 @@
 #   Containing a block group and its first extent at
 #   the beginning of leaf.
 #   Which caused false alert for lowmem mode.
+#
+# Special cases with some rare backref types
+# * reloc tree
+#   For both fs tree and data reloc tree.
+#   Special for its backref pointing to itself and its short life span.
 
 source "$TEST_TOP/common"
 
diff --git a/tests/fsck-tests/015-tree-reloc-tree/tree_reloc_for_data_reloc.img.xz b/tests/fsck-tests/020-extent-ref-cases/tree_reloc_for_data_reloc.img.xz
similarity index 100%
rename from tests/fsck-tests/015-tree-reloc-tree/tree_reloc_for_data_reloc.img.xz
rename to tests/fsck-tests/020-extent-ref-cases/tree_reloc_for_data_reloc.img.xz
diff --git a/tests/fsck-tests/015-tree-reloc-tree/tree_reloc_for_fs_tree.img.xz b/tests/fsck-tests/020-extent-ref-cases/tree_reloc_for_fs_tree.img.xz
similarity index 100%
rename from tests/fsck-tests/015-tree-reloc-tree/tree_reloc_for_fs_tree.img.xz
rename to tests/fsck-tests/020-extent-ref-cases/tree_reloc_for_fs_tree.img.xz