diff --git a/test/formatter_test.exs b/test/formatter_test.exs
index 2e717194b..f14077d25 100644
--- a/test/formatter_test.exs
+++ b/test/formatter_test.exs
@@ -197,7 +197,7 @@ test "does not give a replacement for single-character local nicknames who don't
 
       {subs, text} = Formatter.add_user_links({[], text}, mentions)
 
-      assert length(subs) == 0
+      assert Enum.empty?(subs)
       Enum.each(subs, fn {uuid, _} -> assert String.contains?(text, uuid) end)
 
       expected_text = "@a hi"
diff --git a/test/notification_test.exs b/test/notification_test.exs
index d36a92a7c..755874a3d 100644
--- a/test/notification_test.exs
+++ b/test/notification_test.exs
@@ -300,7 +300,7 @@ test "liking an activity results in 1 notification, then 0 if the activity is de
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _, _} = CommonAPI.favorite(activity.id, other_user)
 
@@ -308,7 +308,7 @@ test "liking an activity results in 1 notification, then 0 if the activity is de
 
       {:ok, _} = CommonAPI.delete(activity.id, user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "liking an activity results in 1 notification, then 0 if the activity is unliked" do
@@ -317,7 +317,7 @@ test "liking an activity results in 1 notification, then 0 if the activity is un
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _, _} = CommonAPI.favorite(activity.id, other_user)
 
@@ -325,7 +325,7 @@ test "liking an activity results in 1 notification, then 0 if the activity is un
 
       {:ok, _, _, _} = CommonAPI.unfavorite(activity.id, other_user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "repeating an activity results in 1 notification, then 0 if the activity is deleted" do
@@ -334,7 +334,7 @@ test "repeating an activity results in 1 notification, then 0 if the activity is
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _, _} = CommonAPI.repeat(activity.id, other_user)
 
@@ -342,7 +342,7 @@ test "repeating an activity results in 1 notification, then 0 if the activity is
 
       {:ok, _} = CommonAPI.delete(activity.id, user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "repeating an activity results in 1 notification, then 0 if the activity is unrepeated" do
@@ -351,7 +351,7 @@ test "repeating an activity results in 1 notification, then 0 if the activity is
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _, _} = CommonAPI.repeat(activity.id, other_user)
 
@@ -359,7 +359,7 @@ test "repeating an activity results in 1 notification, then 0 if the activity is
 
       {:ok, _, _} = CommonAPI.unrepeat(activity.id, other_user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "liking an activity which is already deleted does not generate a notification" do
@@ -368,15 +368,15 @@ test "liking an activity which is already deleted does not generate a notificati
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _deletion_activity} = CommonAPI.delete(activity.id, user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:error, _} = CommonAPI.favorite(activity.id, other_user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "repeating an activity which is already deleted does not generate a notification" do
@@ -385,15 +385,15 @@ test "repeating an activity which is already deleted does not generate a notific
 
       {:ok, activity} = CommonAPI.post(user, %{"status" => "test post"})
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:ok, _deletion_activity} = CommonAPI.delete(activity.id, user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
 
       {:error, _} = CommonAPI.repeat(activity.id, other_user)
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
 
     test "replying to a deleted post without tagging does not generate a notification" do
@@ -409,7 +409,7 @@ test "replying to a deleted post without tagging does not generate a notificatio
           "in_reply_to_status_id" => activity.id
         })
 
-      assert length(Notification.for_user(user)) == 0
+      assert Enum.empty?(Notification.for_user(user))
     end
   end
 end
diff --git a/test/tasks/user_test.exs b/test/tasks/user_test.exs
index 44271898c..7b814d171 100644
--- a/test/tasks/user_test.exs
+++ b/test/tasks/user_test.exs
@@ -151,7 +151,7 @@ test "user is unsubscribed" do
       assert message =~ "Successfully unsubscribed"
 
       user = User.get_by_nickname(user.nickname)
-      assert length(user.following) == 0
+      assert Enum.empty?(user.following)
       assert user.info.deactivated
     end
 
diff --git a/test/web/mastodon_api/mastodon_api_controller_test.exs b/test/web/mastodon_api/mastodon_api_controller_test.exs
index 9fd505f84..19393f355 100644
--- a/test/web/mastodon_api/mastodon_api_controller_test.exs
+++ b/test/web/mastodon_api/mastodon_api_controller_test.exs
@@ -36,7 +36,7 @@ test "the home timeline", %{conn: conn} do
       |> assign(:user, user)
       |> get("/api/v1/timelines/home")
 
-    assert length(json_response(conn, 200)) == 0
+    assert Enum.empty?(json_response(conn, 200))
 
     {:ok, user} = User.follow(user, following)
 
diff --git a/test/web/websub/websub_controller_test.exs b/test/web/websub/websub_controller_test.exs
index 04fb4a5a3..87b01d89b 100644
--- a/test/web/websub/websub_controller_test.exs
+++ b/test/web/websub/websub_controller_test.exs
@@ -81,7 +81,7 @@ test "rejects incoming feed updates with the wrong signature", %{conn: conn} do
 
       assert response(conn, 500) == "Error"
 
-      assert length(Repo.all(Activity)) == 0
+      assert Enum.empty?(Repo.all(Activity))
     end
   end
 end