diff --git a/tests/external/pre_commit/test_pre_commit_5_reformat_markdown.py b/tests/external/pre_commit/test_pre_commit_5_reformat_markdown.py
index d52c4865..f596504e 100644
--- a/tests/external/pre_commit/test_pre_commit_5_reformat_markdown.py
+++ b/tests/external/pre_commit/test_pre_commit_5_reformat_markdown.py
@@ -42,9 +42,9 @@ def test_pre_commit_hook_sync_reformat_code_and_markdown(
     jupytext_pre_commit_config["repos"][0]["hooks"][0]["additional_dependencies"] = [
         "nbconvert==5.0.8"
     ]
-    jupytext_pre_commit_config["repos"][0]["hooks"][1] = jupytext_pre_commit_config[
-        "repos"
-    ][0]["hooks"][0]
+    jupytext_pre_commit_config["repos"][0]["hooks"].append(
+        jupytext_pre_commit_config["repos"][0]["hooks"][0]
+    )
     jupytext_pre_commit_config["repos"][0]["hooks"][1]["args"] = [
         "--sync",
         "--pipe",