diff --git a/manifest/main.ml b/manifest/main.ml
index 6f750b2af855f41df8a47da96f04ed54ff3c0d7e..5bc04e1d536fa85bd2e91b2c7f14b64140d8203e 100644
--- a/manifest/main.ml
+++ b/manifest/main.ml
@@ -3960,7 +3960,7 @@ let _octez_dac_node_lib_tests =
 
 let _octez_dac_lib_tests =
   tezt
-    ["test_certificate"]
+    ["test_certificate"; "test_dac_plugin"]
     ~path:"src/lib_dac/test"
     ~opam:"tezos-dac-lib-test"
     ~synopsis:"Test for dac lib"
diff --git a/src/lib_dac/dac_plugin.ml b/src/lib_dac/dac_plugin.ml
index ad5abcfbda6a3b7f3b2ab67331dc563bf91a6143..b6408281c638e95410f7e648ea4d455bf5861dab 100644
--- a/src/lib_dac/dac_plugin.ml
+++ b/src/lib_dac/dac_plugin.ml
@@ -38,7 +38,17 @@ type supported_hashes = Blake2B
 
 let raw_compare = Bytes.compare
 
-let raw_hash_encoding = Data_encoding.bytes' Hex
+let raw_hash_encoding =
+  let open Data_encoding in
+  union
+    [
+      case
+        Json_only
+        Data_encoding.bytes
+        ~title:"raw_hash"
+        (fun raw_hash -> Some raw_hash)
+        (fun raw_hash -> raw_hash);
+    ]
 
 let hash_to_raw = Fun.id
 
diff --git a/src/lib_dac/test/dune b/src/lib_dac/test/dune
index 6a36bf519e4c842b67d9d2f30e477a3c004385d8..e1248db8c06b82f7256ac0c04725c107b3842b47 100644
--- a/src/lib_dac/test/dune
+++ b/src/lib_dac/test/dune
@@ -26,7 +26,7 @@
   -open Tezos_base_test_helpers
   -open Tezos_dac_lib
   -open Octez_alcotezt)
- (modules test_certificate))
+ (modules test_certificate test_dac_plugin))
 
 (executable
  (name main)
diff --git a/src/lib_dac/test/test_dac_plugin.ml b/src/lib_dac/test/test_dac_plugin.ml
new file mode 100644
index 0000000000000000000000000000000000000000..9aec426722447e1e23ec06cb571e4b7d7e16550f
--- /dev/null
+++ b/src/lib_dac/test/test_dac_plugin.ml
@@ -0,0 +1,85 @@
+(*****************************************************************************)
+(*                                                                           *)
+(* Open Source License                                                       *)
+(* Copyright (c) 2023 Marigold <contact@marigold.dev>                        *)
+(*                                                                           *)
+(* Permission is hereby granted, free of charge, to any person obtaining a   *)
+(* copy of this software and associated documentation files (the "Software"),*)
+(* to deal in the Software without restriction, including without limitation *)
+(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
+(* and/or sell copies of the Software, and to permit persons to whom the     *)
+(* Software is furnished to do so, subject to the following conditions:      *)
+(*                                                                           *)
+(* The above copyright notice and this permission notice shall be included   *)
+(* in all copies or substantial portions of the Software.                    *)
+(*                                                                           *)
+(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
+(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
+(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
+(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
+(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING   *)
+(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
+(* DEALINGS IN THE SOFTWARE.                                                 *)
+(*                                                                           *)
+(*****************************************************************************)
+
+(** Testing
+    -------
+    Component:  Lib_dac Dac_plugin
+    Invocation: dune exec src/lib_dac/test/main.exe -- --file test_dac_plugin.ml
+    Subject:    Tests for the Dac_plugin.raw_hash.
+*)
+
+(* On all the following tests, the raw_hash used is coming from
+   tezt/tests/dac_example_payloads/preimage.json *)
+let test_encode_decode_json () =
+  let raw_hash =
+    Dac_plugin.raw_hash_of_bytes
+      (Bytes.of_string
+         "00dce42551fb786c51b29b723f4abba3ea04eb3d239a9a59ec5a5434e151e105e4")
+  in
+  let encoded_raw_hash =
+    Data_encoding.Json.construct Dac_plugin.raw_hash_encoding raw_hash
+  in
+  let decoded_raw_hash =
+    Data_encoding.Json.destruct Dac_plugin.raw_hash_encoding encoded_raw_hash
+  in
+  assert (raw_hash = decoded_raw_hash)
+
+let test_cannot_encode_binary () =
+  let raw_hash =
+    Dac_plugin.raw_hash_of_bytes
+      (Bytes.of_string
+         "00dce42551fb786c51b29b723f4abba3ea04eb3d239a9a59ec5a5434e151e105e4")
+  in
+  let encoded_raw_hash =
+    Data_encoding.Binary.to_string Dac_plugin.raw_hash_encoding raw_hash
+  in
+  match encoded_raw_hash with Error _ -> () | Ok _ -> assert false
+
+let test_cannot_decode_binary () =
+  let raw_hash =
+    "00dce42551fb786c51b29b723f4abba3ea04eb3d239a9a59ec5a5434e151e105e4"
+  in
+  let encoded_raw_hash =
+    Data_encoding.Binary.of_string Dac_plugin.raw_hash_encoding raw_hash
+  in
+  match encoded_raw_hash with Error _ -> () | Ok _ -> assert false
+
+let tests =
+  [
+    Alcotest.test_case
+      "Encode and decode to JSON leads to the same Dac_plugin.raw_hash"
+      `Quick
+      test_encode_decode_json;
+    Alcotest.test_case
+      "Cannot encode a raw_hash to binary"
+      `Quick
+      test_cannot_encode_binary;
+    Alcotest.test_case
+      "Cannot decode a raw_hash to binary"
+      `Quick
+      test_cannot_decode_binary;
+  ]
+
+let () = Alcotest.run ~__FILE__ "lib_dac" [("Dac_plugin.ml", tests)]