diff --git a/tools/check_format_compatible.sh b/tools/check_format_compatible.sh
index 97411d3fc..8930d0bcf 100755
--- a/tools/check_format_compatible.sh
+++ b/tools/check_format_compatible.sh
@@ -4,7 +4,7 @@
 # ./ldb needs to be avaible to be executed.
 #
 # Usage: <SCRIPT> [checkout]
-# `checkout` can be a tag, commit or branch name. Will build using it and check DBs generated by all previous tags can be opened by it.
+# `checkout` can be a tag, commit or branch name. Will build using it and check DBs generated by all previous branches (or tags for very old versions without branch) can be opened by it.
 # Return value 0 means all regression tests pass. 1 if not pass.
 
 scriptpath=`dirname $BASH_SOURCE`
@@ -41,10 +41,8 @@ with open('${input_data[$i]}', 'w') as f:
 EOF
 done
 
-# v2.1 or older doesn't pass the debug build but OK with release build
-declare -a need_release_tags=("v1.5.7" "v2.1")
-declare -a tags=("v2.5" "v2.4" "v2.3" "v2.2" "v2.8" "v3.0" "v3.1" "v3.2" "v3.3" "v3.4" "rocksdb-3.5.1" "rocksdb-3.6.2" "rocksdb-3.7" "rocksdb-3.8" "rocksdb-3.9" "v3.10" "v3.11" "v3.12.1" "v3.13.1" "v4.0" "v4.1" "v4.2" "v4.3" "v4.3.1" "v4.4")
-declare -a forward_compatible_tags=("v3.10" "v3.11" "v3.12.1" "v3.13.1" "v4.0" "v4.1" "v4.2" "v4.3.1" "v4.4")
+declare -a checkout_objs=("v2.2" "v2.3" "v2.4" "v2.5" "2.8.fb" "3.0.fb" "3.1.fb" "3.2.fb" "3.3.fb" "3.4.fb" "3.5.fb" "3.6.fb" "3.7.fb" "3.8.fb" "3.9.fb" "3.10.fb" "3.11.fb" "3.12.fb" "3.13.fb" "4.0.fb" "4.1.fb" "4.2.fb" "4.3.fb" "4.4.fb" "4.5.fb" "4.6.fb" "4.7.fb" "4.8.fb")
+declare -a forward_compatible_checkout_objs=("3.10.fb" "3.11.fb" "3.12.fb" "3.13.fb" "4.0.fb" "4.1.fb" "4.2.fb" "4.3.fb" "4.4.fb")
 
 generate_db()
 {
@@ -69,13 +67,13 @@ compare_db()
 }
 
 set -e
-for tag in "${tags[@]}" "${need_release_tags[@]}"
+for checkout_obj in "${checkout_objs[@]}"
 do
-   echo == Generating DB from "$tag" ...
-   git checkout $tag
+   echo == Generating DB from "$checkout_obj" ...
+   git checkout $checkout_obj
    make clean
    make ldb -j32
-   generate_db $input_data_path $test_dir/$tag
+   generate_db $input_data_path $test_dir/$checkout_obj
 done
 
 checkout_flag=${1:-"master"}
@@ -88,28 +86,19 @@ compare_base_db_dir=$test_dir"/base_db_dir"
 echo == Generate compare base DB to $compare_base_db_dir
 generate_db $input_data_path $compare_base_db_dir
 
-for tag in "${tags[@]}"
+for checkout_obj in "${checkout_objs[@]}"
 do
-   echo == Opening DB from "$tag" using debug build of $checkout_flag ...
-   compare_db $test_dir/$tag $compare_base_db_dir db_dump.txt
+   echo == Opening DB from "$checkout_obj" using debug build of $checkout_flag ...
+   compare_db $test_dir/$checkout_obj $compare_base_db_dir db_dump.txt
 done
 
-echo == Building $checkout_flag release
-git checkout $checkout_flag
-make release
-for tag in "${need_release_tags[@]}"
-do
-   echo == Opening DB generated by "$tag" using release build of $checkout_flag ...
-   compare_db $test_dir/$tag $compare_base_db_dir db_dump.txt
-done
-
-for tag in "${forward_compatible_tags[@]}"
+for checkout_obj in "${forward_compatible_checkout_objs[@]}"
 do
-   echo == Build "$tag" and try to open DB generated using $checkout_flag...
-   git checkout $tag
+   echo == Build "$checkout_obj" and try to open DB generated using $checkout_flag...
+   git checkout $checkout_obj
    make clean
    make ldb -j32
-   compare_db $test_dir/$tag $compare_base_db_dir forward_${tag}_dump.txt
+   compare_db $test_dir/$checkout_obj $compare_base_db_dir forward_${checkout_obj}_dump.txt
 done
 
 echo ==== Compatibility Test PASSED ====