diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index a3608580d..faa9de096 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -3,5 +3,4 @@
 /zero/ @muursh @Nashtare @atanmarko
 /smt_trie/ @0xaatif @muursh @Nashtare
 /mpt_trie/ @0xaatif @Nashtare @muursh
-/trace_decoder/ @0xaatif @muursh @Nashtare
 .github/ @0xaatif @atanmarko @muursh @Nashtare
diff --git a/zero/README.md b/zero/README.md
index 936a73c91..f2db9a0f3 100644
--- a/zero/README.md
+++ b/zero/README.md
@@ -458,26 +458,6 @@ Filled in:
 
 Finally, note that both of these testing scripts force proof generation to be sequential by allowing only one worker. Because of this, this is not a realistic representation of performance but makes the debugging logs much easier to follow.
 
-### Trace decoder tests
-
-The trace decoder module has some basic regression tests, using the json witness data from the `trace_decoder/tests/data/witnesses` subdirectories.
-When needed (e.g. some block with corner-case discovered), additional input witness data should be generated using the following procedure:
-
-1. Run the `rpc` tool to fetch the block (or multiple blocks) witness:
-
-```sh
-cargo run --package zero --bin rpc fetch --rpc-url <node_rpc_endpoint> --start-block <start> --end-block <end> > ./b<number>_<network>.json
-```
-
-2. Download the header file for the block (or range of blocks), making the json array of headers:
-
-```sh
-file_name = "b<number>_<network>_header.json"
-echo "[" > $file_name && cast rpc eth_getBlockByNumber "0x<block_number>" 'false' --rpc-url <node_rpc_endpoint>  >> $file_name && echo "]" >> $file_name
-```
-
-Move the generated files to the appropriate subdirectory, and they will be automatically included in the test run.
-
 ## License
 
 Licensed under either of
diff --git a/zero/tests/cases/README.md b/zero/tests/cases/README.md
new file mode 100644
index 000000000..798e59f55
--- /dev/null
+++ b/zero/tests/cases/README.md
@@ -0,0 +1,7 @@
+```bash
+cargo run --package zero --bin rpc fetch --rpc-url $rpc_url --start-block $number --end-block $number > ./b$number_$network.json
+header_name=b$number_$network_header.json
+echo "[" > $file_name
+cast rpc eth_getBlockByNumber 0x$number false --rpc-url $rpc_url >> $file_name
+echo "]" >> $file_name
+```