diff --git a/weboob/backends/batoto/test.py b/weboob/backends/batoto/test.py
index 449e59f3..54b57b75 100644
--- a/weboob/backends/batoto/test.py
+++ b/weboob/backends/batoto/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class BatotoTest(GenericComicReaderTest):
     BACKEND = 'batoto'
-    DOWNLOAD_ID = '26287/yurumates_ch4_by_primitive-scans'
+    def test_download(self):
+        return self._test_download('26287/yurumates_ch4_by_primitive-scans')
 
diff --git a/weboob/backends/eatmanga/test.py b/weboob/backends/eatmanga/test.py
index 20acc3c3..ea30fa4d 100644
--- a/weboob/backends/eatmanga/test.py
+++ b/weboob/backends/eatmanga/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class EatmangaTest(GenericComicReaderTest):
     BACKEND = 'eatmanga'
-    DOWNLOAD_ID = 'Glass-Mask/Glass-Mask-Vol-031'
+    def test_download(self):
+        return self._test_download('Glass-Mask/Glass-Mask-Vol-031')
 
diff --git a/weboob/backends/mangafox/test.py b/weboob/backends/mangafox/test.py
index a30a9a60..797ae7b4 100644
--- a/weboob/backends/mangafox/test.py
+++ b/weboob/backends/mangafox/test.py
@@ -22,4 +22,5 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class MangafoxTest(GenericComicReaderTest):
     BACKEND = 'mangafox'
-    DOWNLOAD_ID = 'glass_no_kamen/v02/c000'
+    def test_download(self):
+        return self._test_download('glass_no_kamen/v02/c000')
diff --git a/weboob/backends/mangahere/test.py b/weboob/backends/mangahere/test.py
index cfec6b88..c086d168 100644
--- a/weboob/backends/mangahere/test.py
+++ b/weboob/backends/mangahere/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class MangahereTest(GenericComicReaderTest):
     BACKEND = 'mangahere'
-    DOWNLOAD_ID = 'glass_no_kamen/v02/c000'
+    def test_download(self):
+        return self._test_download('glass_no_kamen/v02/c000')
 
diff --git a/weboob/backends/mangareader/test.py b/weboob/backends/mangareader/test.py
index 4b8bf475..d8ef99f3 100644
--- a/weboob/backends/mangareader/test.py
+++ b/weboob/backends/mangareader/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class MangareaderTest(GenericComicReaderTest):
     BACKEND = 'mangareader'
-    DOWNLOAD_ID = 'glass-mask/3'
+    def test_download(self):
+        return self._test_download('glass-mask/3')
 
diff --git a/weboob/backends/mangatoshokan/test.py b/weboob/backends/mangatoshokan/test.py
index 6a357127..c9a65e77 100644
--- a/weboob/backends/mangatoshokan/test.py
+++ b/weboob/backends/mangatoshokan/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class MangatoshokanTest(GenericComicReaderTest):
     BACKEND = 'mangatoshokan'
-    DOWNLOAD_ID = 'Okujyouhime/Extras/5'
+    def test_download(self):
+        return self._test_download('Okujyouhime/Extras/5')
 
diff --git a/weboob/backends/simplyreadit/test.py b/weboob/backends/simplyreadit/test.py
index fbe06812..1530aa88 100644
--- a/weboob/backends/simplyreadit/test.py
+++ b/weboob/backends/simplyreadit/test.py
@@ -21,5 +21,6 @@ from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicRea
 
 class SimplyreaditTest(GenericComicReaderTest):
     BACKEND = 'simplyreadit'
-    DOWNLOAD_ID = 'bonnouji/en/1/3'
+    def test_download(self):
+        return self._test_download('bonnouji/en/1/3')
 
diff --git a/weboob/tools/capabilities/gallery/genericcomicreader.py b/weboob/tools/capabilities/gallery/genericcomicreader.py
index 15ee7db1..e93e803b 100644
--- a/weboob/tools/capabilities/gallery/genericcomicreader.py
+++ b/weboob/tools/capabilities/gallery/genericcomicreader.py
@@ -114,8 +114,8 @@ class GenericComicReaderBackend(BaseBackend, ICapGallery):
 
 
 class GenericComicReaderTest(BackendTest):
-    def test_download(self):
-        g = self.backend.get_gallery(self.DOWNLOAD_ID)
+    def _test_download(self, _id):
+        g = self.backend.get_gallery(_id)
         it = self.backend.iter_gallery_images(g)
         it.next()
         img = it.next()