diff --git a/tests/tasks/conftest.py b/tests/tasks/conftest.py
new file mode 100644
index 0000000..5045004
--- /dev/null
+++ b/tests/tasks/conftest.py
@@ -0,0 +1,81 @@
+"""
+Common task fixtures.
+"""
+
+
+#
+# Fimfarchive, preserves stories from Fimfiction.
+# Copyright (C) 2020  Joakim Soderlund
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+from typing import Dict
+
+import pytest
+
+from fimfarchive.exceptions import InvalidStoryError
+from fimfarchive.fetchers import Fetcher
+from fimfarchive.stories import Story
+
+
+class DummyFetcher(Fetcher):
+    """
+    Fetcher with local instance storage.
+    """
+
+    def __init__(self):
+        """
+        Constructor.
+        """
+        self.stories: Dict[int, Story] = dict()
+
+    def add(self, key, date, flavors=()):
+        """
+        Adds a story to the fetcher.
+        """
+        story = Story(
+            key=key,
+            flavors=flavors,
+            data=f'Story {key}'.encode(),
+            meta={
+                'id': key,
+                'date_modified': date,
+                'chapters': [
+                    {'id': key},
+                ],
+            },
+        )
+
+        self.stories[key] = story
+
+        return story
+
+    def fetch(self, key):
+        """
+        Returns a previously stored story.
+        """
+        try:
+            return self.stories[key]
+        except KeyError:
+            raise InvalidStoryError()
+
+
+@pytest.fixture
+def dummy() -> DummyFetcher:
+    """
+    Returns a `Fetcher` dummy.
+    """
+    return DummyFetcher()
diff --git a/tests/tasks/test_update.py b/tests/tasks/test_update.py
index 3e061d3..70f0705 100644
--- a/tests/tasks/test_update.py
+++ b/tests/tasks/test_update.py
@@ -5,7 +5,7 @@ Update task tests.
 
 #
 # Fimfarchive, preserves stories from Fimfiction.
-# Copyright (C) 2015  Joakim Soderlund
+# Copyright (C) 2020  Joakim Soderlund
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -22,81 +22,37 @@ Update task tests.
 #
 
 
-from typing import Dict
+from copy import deepcopy
 from unittest.mock import MagicMock, call, patch
 
 import pytest
 
-from fimfarchive.exceptions import InvalidStoryError, StorySourceError
-from fimfarchive.fetchers import Fetcher
+from fimfarchive.exceptions import StorySourceError
 from fimfarchive.flavors import DataFormat, StorySource, UpdateStatus
 from fimfarchive.selectors import RefetchSelector, UpdateSelector
-from fimfarchive.stories import Story
 from fimfarchive.tasks.update import (
     UpdateTask, SUCCESS_DELAY, SKIPPED_DELAY, FAILURE_DELAY,
 )
 
 
-class DummyFetcher(Fetcher):
-    """
-    Fetcher with local instance storage.
-    """
-
-    def __init__(self):
-        """
-        Constructor.
-        """
-        self.stories: Dict[int, Story] = dict()
-
-    def add(self, key, date, flavors=()):
-        """
-        Adds a story to the fetcher.
-        """
-        story = Story(
-            key=key,
-            flavors=flavors,
-            data=f'Story {key}',
-            meta={
-                'id': key,
-                'date_modified': date,
-                'chapters': [
-                    {'id': key},
-                ],
-            },
-        )
-
-        self.stories[key] = story
-
-        return story
-
-    def fetch(self, key):
-        """
-        Returns a previously stored story.
-        """
-        try:
-            return self.stories[key]
-        except KeyError:
-            raise InvalidStoryError()
-
-
 class TestUpdateTask:
     """
     Tests update task.
     """
 
     @pytest.fixture
-    def fimfiction(self):
+    def fimfiction(self, dummy):
         """
         Returns a `Fetcher` simulating Fimfiction.
         """
-        return DummyFetcher()
+        return deepcopy(dummy)
 
     @pytest.fixture
-    def fimfarchive(self):
+    def fimfarchive(self, dummy):
         """
         Returns a `Fetcher` simulating Fimfarchive.
         """
-        return DummyFetcher()
+        return deepcopy(dummy)
 
     @pytest.fixture
     def selector(self):