diff --git a/gallery_dl/extractor/pixiv.py b/gallery_dl/extractor/pixiv.py
index d51f8c79..66caecad 100644
--- a/gallery_dl/extractor/pixiv.py
+++ b/gallery_dl/extractor/pixiv.py
@@ -92,10 +92,11 @@ class PixivExtractor(Extractor):
                     work["caption"] = self._sanitize_ajax_caption(
                         body["illustComment"])
 
-            if transform_tags:
+            if transform_tags is not None:
                 transform_tags(work)
             work["num"] = 0
             work["date"] = dt.parse_iso(work["create_date"])
+            work["count"] = len(files)
             work["rating"] = ratings.get(work["x_restrict"])
             work["suffix"] = ""
             work.update(metadata)
diff --git a/test/results/pixiv.py b/test/results/pixiv.py
index a4d08f11..8d9ca5d6 100644
--- a/test/results/pixiv.py
+++ b/test/results/pixiv.py
@@ -217,11 +217,12 @@ __tests__ = (
 
 {
     "#url"     : "https://www.pixiv.net/artworks/966412",
-    "#comment" : "related works (#1237)",
     "#class"   : pixiv.PixivWorkExtractor,
     "#sha1_url"    : "90c1715b07b0d1aad300bce256a0bc71f42540ba",
     "#sha1_content": "69a8edfb717400d1c2e146ab2b30d2c235440c5a",
 
+    "count"   : 1,
+    "num"     : 0,
     "date"    : "dt:2008-06-12 15:29:13",
     "date_url": "dt:2008-06-12 15:29:13",
 },
@@ -239,6 +240,7 @@ __tests__ = (
     "#results" : "https://i.pximg.net/img-zip-ugoira/img/2018/01/15/13/24/48/66806629_ugoira1920x1080.zip",
 
     "frames"  : list,
+    "count"   : 1,
     "date"    : "dt:2018-01-14 15:06:08",
     "date_url": "dt:2018-01-15 04:24:48",
 },
@@ -258,6 +260,7 @@ __tests__ = (
     ),
 
     "frames": list,
+    "count" : 6,
 },
 
 {
@@ -287,6 +290,7 @@ __tests__ = (
     "caption"       : "Meet a deer .",
     "comment_access_control": 0,
     "comments"      : (),
+    "count"         : 1,
     "create_date"   : "2022-11-19T15:00:00+00:00",
     "date"          : "dt:2022-11-19 15:00:00",
     "date_url"      : "dt:2022-11-19 15:00:49",
@@ -368,10 +372,7 @@ __tests__ = (
     "#comment" : "deleted limit_sanity_level_360.png work (#6339)",
     "#class"   : pixiv.PixivWorkExtractor,
     "#count"   : 0,
-    "#log"     : (
-        ("warning", "104582860: 'limit_sanity_level' warning"),
-        ("error"  , "'General Error'"),
-    ),
+    "#exception": exception.NotFoundError,
 },
 
 {