diff --git a/wikiteam3/dumpgenerator/dump/image/html_regexs_test.py b/wikiteam3/dumpgenerator/dump/image/html_regexs_test.py
new file mode 100644
index 0000000..9434482
--- /dev/null
+++ b/wikiteam3/dumpgenerator/dump/image/html_regexs_test.py
@@ -0,0 +1,95 @@
+import os
+import re
+from typing import Dict, List
+import pytest
+import requests
+from pathlib import Path
+
+from wikiteam3.dumpgenerator.dump.image.html_regexs import REGEX_CANDIDATES
+
+ONLINE = True
+
+HTML_DIR = Path("test/data/html_regexs")
+os.makedirs(HTML_DIR, exist_ok=True)
+
+def prepare_raws_from_urls(urls: Dict[str, str]):
+    sess = requests.Session()
+    raws: Dict[str, str] = {}
+    for site, url in urls.items():
+        try:
+            resp = sess.get(url, timeout=10, allow_redirects=True)
+        except Exception as e:
+            pytest.warns(UserWarning, match=f"Could not fetch {url}: {e}")
+            continue
+
+        if resp.status_code == 200:
+            raws[url] = resp.text
+            if not os.path.exists(HTML_DIR / f"{site}.html"):
+                with open(HTML_DIR / f"{site}.html", "w", encoding="utf-8") as f:
+                    f.write(resp.text)
+        else:
+            pytest.warns(UserWarning, match=f"Could not fetch {url}: status_code: {resp.status_code}")
+
+    return raws
+
+class TestRegexs:
+    class TestRegexsOnline:
+        listFiles_urls = {
+            # site-date: url , `limit=` for counting the number of matches
+            "group0.mediawiki.demo.save-web.org_mediawiki-1.16.5-20230701": "http://group0.mediawiki.demo.save-web.org/mediawiki-1.16.5/index.php?title=特殊:文件列表&limit=2",
+            "group2.mediawiki.demo.save-web.org_mediawiki-1.39.1-20230701": "http://group2.mediawiki.demo.save-web.org/mediawiki-1.39.1/index.php?title=Special:ListFiles&limit=1",
+            "archiveteam.org-20230701": "https://wiki.archiveteam.org/index.php?title=Special:ListFiles&sort=byname&limit=7",
+            "wiki.othing.xyz-20230701": "https://wiki.othing.xyz/index.php?title=Special:ListFiles&sort=byname",
+            "mediawiki.org-20230701": "https://www.mediawiki.org/w/index.php?title=Special:ListFiles&sort=byname&limit=7",
+            "asoiaf.fandom.com-20230701": "https://asoiaf.fandom.com/zh/wiki/Special:文件列表?sort=byname&limit=7",
+            
+            # only for local testing:
+            # "commons.moegirl.org.cn-20230701": "https://commons.moegirl.org.cn/index.php?title=Special:ListFiles&sort=byname&limit=7",
+            # # login required:
+            # "group0.mediawiki.demo.save-web.org_mediawiki-1.23.17-20230701": "http://group0.mediawiki.demo.save-web.org/mediawiki-1.23.17/index.php?title=Special:文件列表&limit=1",
+            # "group1.mediawiki.demo.save-web.org_mediawiki-1.27.7-20230701": "http://group1.mediawiki.demo.save-web.org/mediawiki-1.27.7/index.php?title=Special:ListFiles&limit=2",
+        }
+        raws: Dict[str, str] = {}
+        def test_online(self):
+            if not ONLINE:
+                pytest.skip("Online test skipped")
+            self.raws = prepare_raws_from_urls(self.listFiles_urls)
+            assert len(self.raws) != 0, "Could not fetch any of the URLs"
+            for url, raw in self.raws.items():
+                best_matched = 0
+                regexp_best = None
+
+                for index, regexp in enumerate(REGEX_CANDIDATES):
+                    _count = len(re.findall(regexp, raw))
+                    if _count > best_matched:
+                        best_matched = _count
+                        regexp_best = regexp
+
+                assert regexp_best is not None, f"Could not find a proper regexp to parse the HTML for {url} (online)"
+
+                if "limit=" in url:
+                    limit = int(url.split("limit=")[-1])
+                    assert len(re.findall(regexp_best, raw)) == limit, f"Could not find {limit} matches for {url} (online)"
+
+
+    class TestRegexsOffline:
+        html_files = os.listdir(HTML_DIR)
+        raws: Dict[str, str] = {}
+        for html_file in html_files:
+            with open(HTML_DIR / html_file, "r", encoding="utf-8") as f:
+                raws[html_file] = f.read()
+        assert len(raws) != 0, f"Could not find any HTML files in {HTML_DIR}"
+
+        def test_offline(self):
+            assert len(self.raws) != 0, "Could not fetch any of the URLs"
+            for site, raw in self.raws.items():
+                best_matched = 0
+                regexp_best = None
+
+                for index, regexp in enumerate(REGEX_CANDIDATES):
+                    _count = len(re.findall(regexp, raw))
+                    if _count > best_matched:
+                        best_matched = _count
+                        regexp_best = regexp
+
+                assert regexp_best is not None, f"Could not find a proper regexp to parse the HTML for {site} (local)"