diff --git a/cache.py b/cache.py
index 4fedcd36f..ab6fb19d0 100644
--- a/cache.py
+++ b/cache.py
@@ -8,6 +8,7 @@ __status__ = "Production"
 __module_group__ = "Core"
 
 import os
+import json
 from session import download_image
 from session import url_exists
 from session import get_json
@@ -357,3 +358,36 @@ def cache_svg_images(session, base_dir: str, http_prefix: str,
             else:
                 cached = True
     return cached
+
+
+def update_recent_posts_cache(recent_posts_cache: {}, max_recent_posts: int,
+                              post_json_object: {}, html_str: str) -> None:
+    """Store recent posts in memory so that they can be quickly recalled
+    """
+    if not post_json_object.get('id'):
+        return
+    post_id = post_json_object['id']
+    if '#' in post_id:
+        post_id = post_id.split('#', 1)[0]
+    post_id = remove_id_ending(post_id).replace('/', '#')
+    if recent_posts_cache.get('index'):
+        if post_id in recent_posts_cache['index']:
+            return
+        recent_posts_cache['index'].append(post_id)
+        post_json_object['muted'] = False
+        recent_posts_cache['json'][post_id] = json.dumps(post_json_object)
+        recent_posts_cache['html'][post_id] = html_str
+
+        while len(recent_posts_cache['html'].items()) > max_recent_posts:
+            post_id = recent_posts_cache['index'][0]
+            recent_posts_cache['index'].pop(0)
+            if recent_posts_cache['json'].get(post_id):
+                del recent_posts_cache['json'][post_id]
+            if recent_posts_cache['html'].get(post_id):
+                del recent_posts_cache['html'][post_id]
+    else:
+        recent_posts_cache['index'] = [post_id]
+        recent_posts_cache['json'] = {}
+        recent_posts_cache['html'] = {}
+        recent_posts_cache['json'][post_id] = json.dumps(post_json_object)
+        recent_posts_cache['html'][post_id] = html_str
diff --git a/tests.py b/tests.py
index 1a2581230..057691720 100644
--- a/tests.py
+++ b/tests.py
@@ -30,6 +30,7 @@ from httpsig import sign_post_headers
 from httpsig import sign_post_headers_new
 from httpsig import verify_post_headers
 from httpsig import message_content_digest
+from cache import update_recent_posts_cache
 from cache import cache_svg_images
 from cache import store_person_in_cache
 from cache import get_person_from_cache
@@ -100,7 +101,6 @@ from utils import get_full_domain
 from utils import valid_nickname
 from utils import first_paragraph_from_string
 from utils import remove_id_ending
-from utils import update_recent_posts_cache
 from utils import follow_person
 from utils import get_nickname_from_actor
 from utils import get_domain_from_actor
diff --git a/utils.py b/utils.py
index 3b7c28656..aacfb451a 100644
--- a/utils.py
+++ b/utils.py
@@ -2830,39 +2830,6 @@ def get_cached_post_filename(base_dir: str, nickname: str, domain: str,
     return cached_post_filename + '.html'
 
 
-def update_recent_posts_cache(recent_posts_cache: {}, max_recent_posts: int,
-                              post_json_object: {}, html_str: str) -> None:
-    """Store recent posts in memory so that they can be quickly recalled
-    """
-    if not post_json_object.get('id'):
-        return
-    post_id = post_json_object['id']
-    if '#' in post_id:
-        post_id = post_id.split('#', 1)[0]
-    post_id = remove_id_ending(post_id).replace('/', '#')
-    if recent_posts_cache.get('index'):
-        if post_id in recent_posts_cache['index']:
-            return
-        recent_posts_cache['index'].append(post_id)
-        post_json_object['muted'] = False
-        recent_posts_cache['json'][post_id] = json.dumps(post_json_object)
-        recent_posts_cache['html'][post_id] = html_str
-
-        while len(recent_posts_cache['html'].items()) > max_recent_posts:
-            post_id = recent_posts_cache['index'][0]
-            recent_posts_cache['index'].pop(0)
-            if recent_posts_cache['json'].get(post_id):
-                del recent_posts_cache['json'][post_id]
-            if recent_posts_cache['html'].get(post_id):
-                del recent_posts_cache['html'][post_id]
-    else:
-        recent_posts_cache['index'] = [post_id]
-        recent_posts_cache['json'] = {}
-        recent_posts_cache['html'] = {}
-        recent_posts_cache['json'][post_id] = json.dumps(post_json_object)
-        recent_posts_cache['html'][post_id] = html_str
-
-
 def file_last_modified(filename: str) -> str:
     """Returns the date when a file was last modified
     """
diff --git a/webapp_post.py b/webapp_post.py
index 3c53e7314..c0709c6a6 100644
--- a/webapp_post.py
+++ b/webapp_post.py
@@ -14,6 +14,7 @@ from dateutil.parser import parse
 from auth import create_password
 from git import is_git_patch
 from cache import get_person_from_cache
+from cache import update_recent_posts_cache
 from bookmarks import bookmark_from_id
 from bookmarks import bookmarked_by_person
 from announce import announced_by_person
@@ -74,7 +75,6 @@ from utils import get_cached_post_filename
 from utils import get_protocol_prefixes
 from utils import get_display_name
 from utils import display_name_is_emoji
-from utils import update_recent_posts_cache
 from utils import remove_id_ending
 from utils import get_nickname_from_actor
 from utils import get_domain_from_actor