diff --git a/tests/entrypoint_pagination.sh b/tests/entrypoint_pagination.sh
index a13ebf3..fe042cc 100644
--- a/tests/entrypoint_pagination.sh
+++ b/tests/entrypoint_pagination.sh
@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/.." && pwd)"
+
 tmpdir="$(mktemp -d)"
 trap 'rm -rf "$tmpdir"' EXIT
 
@@ -22,14 +25,20 @@ if [[ " $* " == *" -X DELETE "* ]]; then
   exit 0
 fi
 
+# tags 端點沒有需要清理的 tag
+if [[ "$last_arg" == */tags?* ]]; then
+  printf '%s' '[]'
+  exit 0
+fi
+
 case "$last_arg" in
-  *page=1)
+  */releases?*page=1)
     printf '%s' '[{"id":4,"tag_name":"v4","name":"release-4","created_at":"2024-04-01T00:00:00Z"},{"id":3,"tag_name":"v3","name":"release-3","created_at":"2024-03-01T00:00:00Z"}]'
     ;;
-  *page=2)
+  */releases?*page=2)
     printf '%s' '[{"id":2,"tag_name":"v2","name":"release-2","created_at":"2024-02-01T00:00:00Z"},{"id":1,"tag_name":"v1","name":"release-1","created_at":"2024-01-01T00:00:00Z"}]'
     ;;
-  *page=3)
+  */releases?*page=3)
     printf '%s' '[]'
     ;;
   *)
@@ -40,80 +49,7 @@ esac
 EOF
 chmod +x "$bin_dir/curl"
 
-cat >"$bin_dir/jq.py" <<'PY'
-#!/usr/bin/env python3
-import json
-import re
-import sys
-
-expr = ""
-flags = set()
-args = sys.argv[1:]
-
-while args:
-    current = args.pop(0)
-    if current in {"-e", "-c", "-r", "-s"}:
-        flags.add(current)
-        continue
-    if current == "--":
-        if not args:
-            raise SystemExit("missing jq expression")
-        expr = args.pop(0)
-        break
-    if current.startswith("-"):
-        flags.add(current)
-        continue
-    expr = current
-    break
-
-raw = sys.stdin.read()
-
-def dump(value):
-    if "-r" in flags and isinstance(value, (str, int, float)) and not isinstance(value, bool):
-        sys.stdout.write(str(value))
-    else:
-        sys.stdout.write(json.dumps(value, separators=(",", ":")))
-
-if expr == "length":
-    data = json.loads(raw or "null")
-    print(len(data))
-    raise SystemExit(0)
-
-if expr == "add":
-    arrays = [json.loads(line) for line in raw.splitlines() if line.strip()]
-    merged = []
-    for item in arrays:
-        merged.extend(item)
-    dump(merged)
-    raise SystemExit(0)
-
-if expr == "sort_by(.created_at) | reverse":
-    data = json.loads(raw or "[]")
-    dump(sorted(data, key=lambda item: item["created_at"], reverse=True))
-    raise SystemExit(0)
-
-match = re.fullmatch(r"\.\[(\d+):\]", expr)
-if match:
-    data = json.loads(raw or "[]")
-    dump(data[int(match.group(1)):])
-    raise SystemExit(0)
-
-if expr == ".[]":
-    data = json.loads(raw or "[]")
-    for item in data:
-        dump(item)
-        sys.stdout.write("\n")
-    raise SystemExit(0)
-
-match = re.fullmatch(r"\.(id|tag_name|name)", expr)
-if match:
-    data = json.loads(raw or "null")
-    value = data.get(match.group(1))
-    dump(value)
-    raise SystemExit(0)
-
-raise SystemExit(f"unsupported jq expression: {expr}")
-PY
+cp "$script_dir/lib/jq_mock.py" "$bin_dir/jq.py"
 chmod +x "$bin_dir/jq.py"
 
 cat >"$bin_dir/jq" <<'EOF'
@@ -129,7 +65,7 @@ GITEA_SERVER_URL="https://gitea.example.test" \
 GITEA_REPOSITORY="owner/repo" \
 KEEP_COUNT="2" \
 RUNNER_TOKEN="" \
-bash ./entrypoint.sh >/dev/null
+bash "$repo_root/entrypoint.sh" >/dev/null
 
 grep -q 'page=1' "$curl_log"
 grep -q 'page=2' "$curl_log"
@@ -138,6 +74,11 @@ grep -q '/releases/2' "$curl_log"
 grep -q '/releases/1' "$curl_log"
 
 if grep -q '/releases/3' "$curl_log" || grep -q '/releases/4' "$curl_log"; then
-  printf 'unexpected deletion request in %s\n' "$curl_log" >&2
+  printf 'unexpected release deletion request in %s\n' "$curl_log" >&2
+  exit 1
+fi
+
+if grep -q '/tags/' "$curl_log"; then
+  printf 'unexpected tag deletion request in %s\n' "$curl_log" >&2
   exit 1
 fi
diff --git a/tests/entrypoint_tag_cleanup.sh b/tests/entrypoint_tag_cleanup.sh
new file mode 100644
index 0000000..3d3ad68
--- /dev/null
+++ b/tests/entrypoint_tag_cleanup.sh
@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/.." && pwd)"
+
+tmpdir="$(mktemp -d)"
+trap 'rm -rf "$tmpdir"' EXIT
+
+curl_log="$tmpdir/curl.log"
+bin_dir="$tmpdir/bin"
+mkdir -p "$bin_dir"
+
+cat >"$bin_dir/curl" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+log_file="${CURL_LOG:?}"
+printf '%s\n' "$*" >>"$log_file"
+
+last_arg="${!#}"
+
+if [[ " $* " == *" -X DELETE "* ]]; then
+  printf '204'
+  exit 0
+fi
+
+# 倉庫所有 tag：v1~v4 加上兩個未指定 release 的孤兒 tag
+if [[ "$last_arg" == */tags?* ]]; then
+  case "$last_arg" in
+    *page=1)
+      printf '%s' '[{"name":"v4"},{"name":"v3"},{"name":"v2"},{"name":"v1"},{"name":"tmp-build"},{"name":"v0"}]'
+      ;;
+    *)
+      printf '%s' '[]'
+      ;;
+  esac
+  exit 0
+fi
+
+# /releases GET：刪除舊版本後重新取得時，只回傳仍保留的 release
+if grep -Eq -- '-X DELETE .*/releases/[0-9]' "$log_file"; then
+  case "$last_arg" in
+    *page=1)
+      printf '%s' '[{"id":4,"tag_name":"v4","name":"release-4","created_at":"2024-04-01T00:00:00Z"},{"id":3,"tag_name":"v3","name":"release-3","created_at":"2024-03-01T00:00:00Z"}]'
+      ;;
+    *)
+      printf '%s' '[]'
+      ;;
+  esac
+  exit 0
+fi
+
+case "$last_arg" in
+  *page=1)
+    printf '%s' '[{"id":4,"tag_name":"v4","name":"release-4","created_at":"2024-04-01T00:00:00Z"},{"id":3,"tag_name":"v3","name":"release-3","created_at":"2024-03-01T00:00:00Z"}]'
+    ;;
+  *page=2)
+    printf '%s' '[{"id":2,"tag_name":"v2","name":"release-2","created_at":"2024-02-01T00:00:00Z"},{"id":1,"tag_name":"v1","name":"release-1","created_at":"2024-01-01T00:00:00Z"}]'
+    ;;
+  *)
+    printf '%s' '[]'
+    ;;
+esac
+EOF
+chmod +x "$bin_dir/curl"
+
+cp "$script_dir/lib/jq_mock.py" "$bin_dir/jq.py"
+chmod +x "$bin_dir/jq.py"
+
+cat >"$bin_dir/jq" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+exec python3 "$0.py" "$@"
+EOF
+chmod +x "$bin_dir/jq"
+
+PATH="$bin_dir:$PATH" \
+CURL_LOG="$curl_log" \
+GITEA_SERVER_URL="https://gitea.example.test" \
+GITEA_REPOSITORY="owner/repo" \
+KEEP_COUNT="2" \
+RUNNER_TOKEN="" \
+bash "$repo_root/entrypoint.sh" >/dev/null
+
+# 舊版本 release 仍被刪除
+grep -q '/releases/2' "$curl_log"
+grep -q '/releases/1' "$curl_log"
+
+# 未指定 release 的 tag（含被刪除 release 留下的 tag 與其他孤兒 tag）被刪除
+for tag in v2 v1 tmp-build v0; do
+  if ! grep -q "/tags/$tag" "$curl_log"; then
+    printf 'expected tag deletion /tags/%s not found in %s\n' "$tag" "$curl_log" >&2
+    exit 1
+  fi
+done
+
+# 仍指定 release 的 tag 不可被刪除
+for tag in v4 v3; do
+  if grep -q "/tags/$tag" "$curl_log"; then
+    printf 'unexpected deletion of release-assigned tag /tags/%s in %s\n' "$tag" "$curl_log" >&2
+    exit 1
+  fi
+done
diff --git a/tests/lib/jq_mock.py b/tests/lib/jq_mock.py
new file mode 100644
index 0000000..0f05284
--- /dev/null
+++ b/tests/lib/jq_mock.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python3
+"""Minimal jq stand-in for entrypoint.sh tests.
+
+Only the jq expressions used by entrypoint.sh are implemented. Unknown
+expressions fail loudly so new jq usage is noticed instead of silently
+producing wrong results.
+"""
+import json
+import re
+import sys
+
+expr = ""
+flags = set()
+named_args = {}
+args = sys.argv[1:]
+
+while args:
+    current = args.pop(0)
+    if current in {"-e", "-c", "-r", "-s"}:
+        flags.add(current)
+        continue
+    if current == "--arg":
+        key = args.pop(0)
+        value = args.pop(0)
+        named_args[key] = value
+        continue
+    if current == "--":
+        if not args:
+            raise SystemExit("missing jq expression")
+        expr = args.pop(0)
+        break
+    if current.startswith("-"):
+        flags.add(current)
+        continue
+    expr = current
+    break
+
+raw = sys.stdin.read()
+
+
+def dump(value):
+    if "-r" in flags and isinstance(value, (str, int, float)) and not isinstance(value, bool):
+        sys.stdout.write(str(value))
+    else:
+        sys.stdout.write(json.dumps(value, separators=(",", ":")))
+
+
+if expr == "length":
+    data = json.loads(raw or "null")
+    print(len(data))
+    raise SystemExit(0)
+
+if expr == "add":
+    arrays = [json.loads(line) for line in raw.splitlines() if line.strip()]
+    merged = []
+    for item in arrays:
+        merged.extend(item)
+    dump(merged)
+    raise SystemExit(0)
+
+if expr == "sort_by(.created_at) | reverse":
+    data = json.loads(raw or "[]")
+    dump(sorted(data, key=lambda item: item["created_at"], reverse=True))
+    raise SystemExit(0)
+
+if expr == "[.[].tag_name]":
+    data = json.loads(raw or "[]")
+    dump([item["tag_name"] for item in data])
+    raise SystemExit(0)
+
+match = re.fullmatch(r"any\(\.\[\]; \. == \$(\w+)\)", expr)
+if match:
+    data = json.loads(raw or "[]")
+    needle = named_args[match.group(1)]
+    sys.stdout.write("true" if any(item == needle for item in data) else "false")
+    raise SystemExit(0)
+
+match = re.fullmatch(r"\.\[(\d+):\]", expr)
+if match:
+    data = json.loads(raw or "[]")
+    dump(data[int(match.group(1)):])
+    raise SystemExit(0)
+
+if expr == ".[]":
+    data = json.loads(raw or "[]")
+    for item in data:
+        dump(item)
+        sys.stdout.write("\n")
+    raise SystemExit(0)
+
+match = re.fullmatch(r"\.(id|tag_name|name)", expr)
+if match:
+    data = json.loads(raw or "null")
+    value = data.get(match.group(1))
+    dump(value)
+    raise SystemExit(0)
+
+raise SystemExit(f"unsupported jq expression: {expr}")