diff --git a/.github/workflows/ut.yml b/.github/workflows/ut.yml
index 887091fb..211d45ea 100644
--- a/.github/workflows/ut.yml
+++ b/.github/workflows/ut.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: 'ipfs_chromium'
       - name: Run versioned script
diff --git a/test_data/blocks/QmQyqMY5vUBSbSxyitJqthgwZunCQjDVtNd8ggVCxzuPQ4 b/test_data/blocks/QmQyqMY5vUBSbSxyitJqthgwZunCQjDVtNd8ggVCxzuPQ4
new file mode 100644
index 00000000..f60f95eb
--- /dev/null
+++ b/test_data/blocks/QmQyqMY5vUBSbSxyitJqthgwZunCQjDVtNd8ggVCxzuPQ4
@@ -0,0 +1,12 @@
+2
+" Ͳ�vO����U��4�S��-�
+�?&u�L%� 	bad-codes�
1
+" �I�K�wXD$�n�}YVx!+�0�m�ǛY&
+�examples�	.
+" U�;�=�#P�G���^��+Sx�ťmdecY�KKforcedK3
+" v!��t�Z�n�F�T�-Ԕ����d�Ǘ
+good-codes�/
+" 1�M�d����	"�M�͆2�f�e2�ޓ^t<invalidF1
+" �=��`���b��A�Pm�#}"ٴ�W+�/�Tnewlines�
3
+" ���J��P/�J�L��jE���N�{�&��Ǻ�	too-largeԀ
+

\ No newline at end of file
diff --git a/test_data/blocks/QmRzVCV5KLFQNDPCe2Pr1Rg6CECbdrnNFzXFe2XgZNNsJJ b/test_data/blocks/QmRzVCV5KLFQNDPCe2Pr1Rg6CECbdrnNFzXFe2XgZNNsJJ
new file mode 100644
index 00000000..dd862555
Binary files /dev/null and b/test_data/blocks/QmRzVCV5KLFQNDPCe2Pr1Rg6CECbdrnNFzXFe2XgZNNsJJ differ
diff --git a/test_data/blocks/QmTkJRxVhZ248dpRnZpijK7sNQaT5SYgRRXSAgnyy8egxo b/test_data/blocks/QmTkJRxVhZ248dpRnZpijK7sNQaT5SYgRRXSAgnyy8egxo
deleted file mode 100644
index d1dbf261..00000000
--- a/test_data/blocks/QmTkJRxVhZ248dpRnZpijK7sNQaT5SYgRRXSAgnyy8egxo
+++ /dev/null
@@ -1,2 +0,0 @@
-
-�
�
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\ No newline at end of file
diff --git a/test_data/blocks/QmUBtD1YRHn9pGi7KZQwE5YefZ8y3aTtwGYs1eU8Br4xhb b/test_data/blocks/QmUBtD1YRHn9pGi7KZQwE5YefZ8y3aTtwGYs1eU8Br4xhb
deleted file mode 100644
index bffe82a9..00000000
--- a/test_data/blocks/QmUBtD1YRHn9pGi7KZQwE5YefZ8y3aTtwGYs1eU8Br4xhb
+++ /dev/null
@@ -1,2 +0,0 @@
-
-�
�
Ne0 Ne1 Ne2 Ne3 Ne4 Ne5 Ne6 Ne7 Ne8 Ne9 Nf0 Nf1 Nf2 Nf3 Nf4 Nf5 Nf6 Nf7 Nf8 Nf9 Ng0 Ng1 Ng2 Ng3 Ng4 Ng5 Ng6 Ng7 Ng8 Ng9 Nh0 Nh1 Nh2 Nh3 Nh4 Nh5 �

\ No newline at end of file
diff --git a/test_data/blocks/bafkreibmmjbdftosef3rffg7xmyqvsqabig7nlelm23jnwio6bx5563eum b/test_data/blocks/bafkreibmmjbdftosef3rffg7xmyqvsqabig7nlelm23jnwio6bx5563eum
deleted file mode 100644
index 301160a9..00000000
--- a/test_data/blocks/bafkreibmmjbdftosef3rffg7xmyqvsqabig7nlelm23jnwio6bx5563eum
+++ /dev/null
@@ -1 +0,0 @@
-8
\ No newline at end of file