diff --git a/validators/content_registry_ref_token.ak b/validators/content_registry_ref_token.ak
index 85b5a11..6295f7a 100644
--- a/validators/content_registry_ref_token.ak
+++ b/validators/content_registry_ref_token.ak
@@ -208,3 +208,59 @@ test fail_mint_with_unclean_registry_value() {
   let ctx = ScriptContext { purpose: Mint(mock_policy_id()), transaction: tx }
   !content_registry_ref_token(mock_policy_id(), redeemer, ctx)
 }
+
+test success_burn() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(from_asset(policy_id, "", -1)),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  content_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test success_burn_with_other_minting() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(
+        from_asset(policy_id, "", -1) |> add(mock_policy_id_2(), "", 1),
+      ),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  content_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test fail_burn_with_mint() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(from_asset(policy_id, "", 1)),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  !content_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test fail_burn_with_mix() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(
+        from_asset(policy_id, "", -1) |> add(policy_id, "1", 1),
+      ),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  !content_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
diff --git a/validators/ownership_registry_ref_token.ak b/validators/ownership_registry_ref_token.ak
index 0b8e8bf..498d1d5 100644
--- a/validators/ownership_registry_ref_token.ak
+++ b/validators/ownership_registry_ref_token.ak
@@ -208,3 +208,59 @@ test fail_mint_with_unclean_registry_value() {
   let ctx = ScriptContext { purpose: Mint(mock_policy_id()), transaction: tx }
   !ownership_registry_ref_token(mock_policy_id(), redeemer, ctx)
 }
+
+test success_burn() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(from_asset(policy_id, "", -1)),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  ownership_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test success_burn_with_other_minting() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(
+        from_asset(policy_id, "", -1) |> add(mock_policy_id_2(), "", 1),
+      ),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  ownership_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test fail_burn_with_mint() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(from_asset(policy_id, "", 1)),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  !ownership_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}
+
+test fail_burn_with_mix() {
+  let redeemer = RBurn
+  let policy_id = mock_policy_id()
+
+  let tx =
+    Transaction {
+      ..placeholder(),
+      mint: to_minted_value(
+        from_asset(policy_id, "", -1) |> add(policy_id, "1", 1),
+      ),
+    }
+  let ctx = ScriptContext { purpose: Mint(policy_id), transaction: tx }
+  !ownership_registry_ref_token(mock_policy_id(), redeemer, ctx)
+}