diff --git a/app/dashboard/views/domain_detail.py b/app/dashboard/views/domain_detail.py
index 3a831950..cea36ff4 100644
--- a/app/dashboard/views/domain_detail.py
+++ b/app/dashboard/views/domain_detail.py
@@ -1,7 +1,6 @@
 import re
 
 import arrow
-import re2
 from flask import render_template, request, redirect, url_for, flash
 from flask_login import login_required, current_user
 from flask_wtf import FlaskForm
@@ -28,6 +27,7 @@ from app.models import (
     AutoCreateRuleMailbox,
     Job,
 )
+from app.regex_utils import regex_match
 from app.utils import random_string
 
 
@@ -519,16 +519,3 @@ def domain_detail_auto_create(custom_domain_id):
                 )
 
     return render_template("dashboard/domain_detail/auto-create.html", **locals())
-
-
-def regex_match(rule_regex: str, local):
-    regex = re2.compile(rule_regex)
-    try:
-        if re2.fullmatch(regex, local):
-            return True
-    except TypeError:  # re2 bug "Argument 'pattern' has incorrect type (expected bytes, got PythonRePattern)"
-        LOG.w("use re instead of re2 for %s %s", rule_regex, local)
-        regex = re.compile(rule_regex)
-        if re.fullmatch(regex, local):
-            return True
-    return False
diff --git a/app/regex_utils.py b/app/regex_utils.py
new file mode 100644
index 00000000..e3241333
--- /dev/null
+++ b/app/regex_utils.py
@@ -0,0 +1,18 @@
+import re
+
+import re2
+
+from app.log import LOG
+
+
+def regex_match(rule_regex: str, local):
+    regex = re2.compile(rule_regex)
+    try:
+        if re2.fullmatch(regex, local):
+            return True
+    except TypeError:  # re2 bug "Argument 'pattern' has incorrect type (expected bytes, got PythonRePattern)"
+        LOG.w("use re instead of re2 for %s %s", rule_regex, local)
+        regex = re.compile(rule_regex)
+        if re.fullmatch(regex, local):
+            return True
+    return False
diff --git a/tests/dashboard/test_domain_detail.py b/tests/test_regex_utils.py
similarity index 83%
rename from tests/dashboard/test_domain_detail.py
rename to tests/test_regex_utils.py
index 280a96bd..38e29aa0 100644
--- a/tests/dashboard/test_domain_detail.py
+++ b/tests/test_regex_utils.py
@@ -1,4 +1,4 @@
-from app.dashboard.views.domain_detail import regex_match
+from app.regex_utils import regex_match
 
 
 def test_regex_match(flask_client):