diff --git a/src/nefelibata/announcers/mastodon.py b/src/nefelibata/announcers/mastodon.py
index 6829953..7ccfcc5 100644
--- a/src/nefelibata/announcers/mastodon.py
+++ b/src/nefelibata/announcers/mastodon.py
@@ -70,11 +70,15 @@ def announce(self, post: Post) -> str:
         return cast(str, toot["url"])
 
     def collect(self, post: Post) -> List[Response]:
-        _logger.info(f"Collecting replies from Mastodon ({self.base_url})")
+        _logger.info("Collecting replies from Mastodon (%s)", self.base_url)
 
         toot_url = post.parsed[self.url_header]
         toot_id = toot_url.rstrip("/").rsplit("/", 1)[1]
-        context = self.client.status_context(toot_id)
+        try:
+            context = self.client.status_context(toot_id)
+        except mastodon.MastodonNotFoundError:
+            _logger.warning("Toot not found: %s", toot_url)
+            return []
 
         responses = []
         for toot in context["descendants"]:
diff --git a/tests/announcers/test_fawm.py b/tests/announcers/test_fawm.py
index 404f6d6..566f921 100644
--- a/tests/announcers/test_fawm.py
+++ b/tests/announcers/test_fawm.py
@@ -160,7 +160,8 @@ def test_get_comments_from_fawm_page(requests_mock):
         html = fp.read()
     requests_mock.get(url, text=html)
 
-    comments = get_comments_from_fawm_page(url, "username", "password")
+    with freeze_time("2020-12-01T00:00:00Z"):
+        comments = get_comments_from_fawm_page(url, "username", "password")
 
     assert comments == [
         {
@@ -258,7 +259,8 @@ def test_get_response_from_li():
         features="html5lib",
     )
     el = soup.html.body.li
-    response = get_response_from_li(url, el)
+    with freeze_time("2020-12-01T00:00:00Z"):
+        response = get_response_from_li(url, el)
 
     assert response == {
         "source": "FAWM",
@@ -476,7 +478,8 @@ def test_announcer_extra_comments(mock_post, mocker, requests_mock):
     post.parsed["fawm-url"] = "https://fawm.org/songs/1"
     post.parsed["fawm-extra-url"] = "https://fawm.org/songs/2"
 
-    responses = announcer.collect(post)
+    with freeze_time("2020-12-01T00:00:00Z"):
+        responses = announcer.collect(post)
     assert responses == [
         {
             "source": "FAWM",
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 73c3a2f..be55ffc 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -73,7 +73,7 @@ def test_get_config_no_profile_picture(fs):
         "author": {
             "name": "Beto Dealmeida",
             "email": "roberto@dealmeida.net",
-            "profile_picture": "http://www.gravatar.com/avatar/58b573d3eac03131faee739dfc7b360a",
+            "profile_picture": "https://www.gravatar.com/avatar/58b573d3eac03131faee739dfc7b360a",
         },
         "url": "http://blog.taoetc.org/",
         "posts-to-show": 5,