diff --git a/bookwyrm/tests/models/test_job.py b/bookwyrm/tests/models/test_job.py
new file mode 100644
index 000000000..41e28ba7b
--- /dev/null
+++ b/bookwyrm/tests/models/test_job.py
@@ -0,0 +1,107 @@
+""" testing models """
+from unittest.mock import patch
+
+from django.test import TestCase
+
+from bookwyrm import models
+from bookwyrm.models.job import ChildJob, ParentJob
+
+
+class TestParentJob(TestCase):
+    """job manager"""
+
+    @classmethod
+    def setUpTestData(cls):
+        """we're trying to transport user data"""
+        with (
+            patch("bookwyrm.suggested_users.rerank_suggestions_task.delay"),
+            patch("bookwyrm.activitystreams.populate_stream_task.delay"),
+            patch("bookwyrm.lists_stream.populate_lists_task.delay"),
+        ):
+            cls.local_user = models.User.objects.create_user(
+                "mouse", "mouse@mouse.mouse", "password", local=True
+            )
+
+    def test_complete_job(self):
+        """mark a job as complete"""
+        job = ParentJob.objects.create(user=self.local_user)
+        self.assertFalse(job.complete)
+        self.assertEqual(job.status, "pending")
+
+        job.complete_job()
+
+        job.refresh_from_db()
+        self.assertTrue(job.complete)
+        self.assertEqual(job.status, "complete")
+
+    def test_complete_job_with_children(self):
+        """mark a job with children as complete"""
+        job = ParentJob.objects.create(user=self.local_user)
+        child = ChildJob.objects.create(parent_job=job)
+        self.assertFalse(child.complete)
+        self.assertEqual(child.status, "pending")
+
+        job.complete_job()
+
+        child.refresh_from_db()
+        self.assertEqual(child.status, "stopped")
+
+    def test_pending_child_jobs(self):
+        """queryset of child jobs for a parent"""
+        job = ParentJob.objects.create(user=self.local_user)
+        child = ChildJob.objects.create(parent_job=job)
+        ChildJob.objects.create(parent_job=job, complete=True)
+
+        self.assertEqual(job.pending_child_jobs.count(), 1)
+        self.assertEqual(job.pending_child_jobs.first(), child)
+
+
+class TestChildJob(TestCase):
+    """job manager"""
+
+    @classmethod
+    def setUpTestData(cls):
+        """we're trying to transport user data"""
+        with (
+            patch("bookwyrm.suggested_users.rerank_suggestions_task.delay"),
+            patch("bookwyrm.activitystreams.populate_stream_task.delay"),
+            patch("bookwyrm.lists_stream.populate_lists_task.delay"),
+        ):
+            cls.local_user = models.User.objects.create_user(
+                "mouse", "mouse@mouse.mouse", "password", local=True
+            )
+
+    def test_complete_job(self):
+        """a child job completed, so its parent is complete"""
+        job = ParentJob.objects.create(user=self.local_user)
+        child = ChildJob.objects.create(parent_job=job)
+        self.assertFalse(job.complete)
+
+        child.complete_job()
+
+        job.refresh_from_db()
+        self.assertTrue(job.complete)
+        self.assertEqual(job.status, "complete")
+
+    def test_complete_job_with_siblings(self):
+        """a child job completed, but its parent is not complete"""
+        job = ParentJob.objects.create(user=self.local_user)
+        child = ChildJob.objects.create(parent_job=job)
+        ChildJob.objects.create(parent_job=job)
+        self.assertFalse(job.complete)
+
+        child.complete_job()
+
+        job.refresh_from_db()
+        self.assertFalse(job.complete)
+
+    def test_set_status(self):
+        """a parent job is activated when a child task is activated"""
+        job = ParentJob.objects.create(user=self.local_user)
+        child = ChildJob.objects.create(parent_job=job)
+        self.assertEqual(job.status, "pending")
+
+        child.set_status("active")
+        job.refresh_from_db()
+
+        self.assertEqual(job.status, "active")
diff --git a/bookwyrm/tests/templatetags/test_utilities.py b/bookwyrm/tests/templatetags/test_utilities.py
index bfd4f41ae..a6571075e 100644
--- a/bookwyrm/tests/templatetags/test_utilities.py
+++ b/bookwyrm/tests/templatetags/test_utilities.py
@@ -89,3 +89,17 @@ class UtilitiesTags(TestCase):
 
         result = utilities.get_isni_bio(data, self.author)
         self.assertEqual(result, "Author of <em>One\\Dtwo</em>")
+
+    def test_id_to_username(self, *_):
+        """given an arbitrary remote id, return the username"""
+        self.assertEqual(
+            utilities.id_to_username("http://example.com/rat"), "rat@example.com"
+        )
+        self.assertEqual(utilities.id_to_username(None), "a new user account")
+
+    def test_get_file_size(self, *_):
+        """display the size of a file in human readable terms"""
+        self.assertEqual(utilities.get_file_size(5), "5.0 bytes")
+        self.assertEqual(utilities.get_file_size(5120), "5.00 KB")
+        self.assertEqual(utilities.get_file_size(5242880), "5.00 MB")
+        self.assertEqual(utilities.get_file_size(5368709000), "5.00 GB")