diff --git a/gallery_dl/extractor/batoto.py b/gallery_dl/extractor/batoto.py
index 1c27dc38..c79c5265 100644
--- a/gallery_dl/extractor/batoto.py
+++ b/gallery_dl/extractor/batoto.py
@@ -90,10 +90,15 @@ class BatotoChapterExtractor(BatotoExtractor, AsynchronousExtractor):
     directory_fmt = ["{category}", "{manga}", "c{chapter:>03} - {title}"]
     filename_fmt = "{manga}_c{chapter:>03}_{page:>03}.{extension}"
     pattern = [r"(?:https?://)?(?:www\.)?bato\.to/reader#([0-9a-f]+)"]
-    test = [("http://bato.to/reader#459878c8fda07502", {
-        "url": "432d7958506ad913b0a9e42664a89e46a63e9296",
-        "keyword": "75a3a86d32aecfc21c44865b4043490757f73d77",
-    })]
+    test = [
+        ("http://bato.to/reader#459878c8fda07502", {
+            "url": "432d7958506ad913b0a9e42664a89e46a63e9296",
+            "keyword": "75a3a86d32aecfc21c44865b4043490757f73d77",
+        }),
+        ("http://bato.to/reader#459878c8fda07503", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
     reader_url = "https://bato.to/areader"
 
     def __init__(self, match):
diff --git a/gallery_dl/extractor/exhentai.py b/gallery_dl/extractor/exhentai.py
index 7cbbcead..94a44979 100644
--- a/gallery_dl/extractor/exhentai.py
+++ b/gallery_dl/extractor/exhentai.py
@@ -22,10 +22,18 @@ class ExhentaiGalleryExtractor(Extractor):
     directory_fmt = ["{category}", "{gallery-id}"]
     filename_fmt = "{gallery-id}_{num:>04}_{image-token}_{name}.{extension}"
     pattern = [r"(?:https?://)?(?:g\.e-|ex)hentai\.org/g/(\d+)/([\da-f]{10})"]
-    test = [("https://exhentai.org/g/960460/4f0e369d82/", {
-        "keyword": "623f8c86c9fe38e964682dd4309b96922655b900",
-        "content": "493d759de534355c9f55f8e365565b62411de146",
-    })]
+    test = [
+        ("https://exhentai.org/g/960460/4f0e369d82/", {
+            "keyword": "623f8c86c9fe38e964682dd4309b96922655b900",
+            "content": "493d759de534355c9f55f8e365565b62411de146",
+        }),
+        ("https://exhentai.org/g/960461/4f0e369d82/", {
+            "exception": exception.NotFoundError,
+        }),
+        ("http://exhentai.org/g/962698/7f02358e00/", {
+            "exception": exception.AuthorizationError,
+        }),
+    ]
     api_url = "https://exhentai.org/api.php"
 
     def __init__(self, match):
diff --git a/gallery_dl/extractor/hentaifoundry.py b/gallery_dl/extractor/hentaifoundry.py
index 6bb0e947..979de6f8 100644
--- a/gallery_dl/extractor/hentaifoundry.py
+++ b/gallery_dl/extractor/hentaifoundry.py
@@ -21,10 +21,15 @@ class HentaifoundryUserExtractor(Extractor):
         r"(?:https?://)?(?:www\.)?hentai-foundry\.com/pictures/user/([^/]+)/?$",
         r"(?:https?://)?(?:www\.)?hentai-foundry\.com/user/([^/]+)/profile",
     ]
-    test = [("http://www.hentai-foundry.com/pictures/user/Tenpura", {
-        "url": "95d44a26498ae4a73963e6fd03ea5e0e624f14a0",
-        "keyword": "6937c20b3afe5a0af741cc1c419994dd041c8395",
-    })]
+    test = [
+        ("http://www.hentai-foundry.com/pictures/user/Tenpura", {
+            "url": "95d44a26498ae4a73963e6fd03ea5e0e624f14a0",
+            "keyword": "6937c20b3afe5a0af741cc1c419994dd041c8395",
+        }),
+        ("http://www.hentai-foundry.com/user/asdq/profile", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
     url_base = "http://www.hentai-foundry.com/pictures/user/"
 
     def __init__(self, match):
@@ -112,11 +117,16 @@ class HentaifoundryImageExtractor(Extractor):
     pattern = [(r"(?:https?://)?(?:www\.|pictures\.)?hentai-foundry\.com/"
                 r"(?:pictures/user/([^/]+)/(\d+)"
                 r"|[^/]/([^/]+)/(\d+))")]
-    test = [("http://www.hentai-foundry.com/pictures/user/Tenpura/340854/notitle", {
-        "url": "f3c0739bf86543697deabbed4bf99eb95a04582b",
-        "keyword": "96217c5becc1369c36dafa201c3c208518de8f1f",
-        "content": "5c14cd10deaad79a5152f9de45c9203cf76165a0",
-    })]
+    test = [
+        ("http://www.hentai-foundry.com/pictures/user/Tenpura/340854/notitle", {
+            "url": "f3c0739bf86543697deabbed4bf99eb95a04582b",
+            "keyword": "96217c5becc1369c36dafa201c3c208518de8f1f",
+            "content": "5c14cd10deaad79a5152f9de45c9203cf76165a0",
+        }),
+        ("http://www.hentai-foundry.com/pictures/user/Tenpura/340853/", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
 
     def __init__(self, match):
         Extractor.__init__(self)
diff --git a/gallery_dl/extractor/imgbox.py b/gallery_dl/extractor/imgbox.py
index 550dd839..36272fc9 100644
--- a/gallery_dl/extractor/imgbox.py
+++ b/gallery_dl/extractor/imgbox.py
@@ -19,11 +19,16 @@ class ImgboxGalleryExtractor(AsynchronousExtractor):
     directory_fmt = ["{category}", "{title} - {gallery-key}"]
     filename_fmt = "{num:>03}-{filename}"
     pattern = [r"(?:https?://)?(?:www\.)?imgbox\.com/g/([A-Za-z0-9]{10})"]
-    test = [("https://imgbox.com/g/JaX5V5HX7g", {
-        "url": "6eafdeebaf0774238dddc9227e2ba315e40e9b7c",
-        "keyword": "cebd7f6868cf84ff492341c936cb6dbe5cde4682",
-        "content": "d20307dc8511ac24d688859c55abf2e2cc2dd3cc",
-    })]
+    test = [
+        ("https://imgbox.com/g/JaX5V5HX7g", {
+            "url": "6eafdeebaf0774238dddc9227e2ba315e40e9b7c",
+            "keyword": "cebd7f6868cf84ff492341c936cb6dbe5cde4682",
+            "content": "d20307dc8511ac24d688859c55abf2e2cc2dd3cc",
+        }),
+        ("https://imgbox.com/g/JaX5V5HX7h", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
     url_base = "https://imgbox.com"
 
     def __init__(self, match):
@@ -79,11 +84,16 @@ class ImgboxImageExtractor(Extractor):
     directory_fmt = ["{category}"]
     filename_fmt = "{filename}"
     pattern = [r"(?:https?://)?(?:www\.)?imgbox\.com/([A-Za-z0-9]{8})"]
-    test = [("https://imgbox.com/qHhw7lpG", {
-        "url": "b9556dc307edf88e016fbced6d354702bc236070",
-        "keyword": "ff0524dba869a4b3292d7d4f72f5da4024b4f002",
-        "content": "0c8768055e4e20e7c7259608b67799171b691140",
-    })]
+    test = [
+        ("https://imgbox.com/qHhw7lpG", {
+            "url": "b9556dc307edf88e016fbced6d354702bc236070",
+            "keyword": "ff0524dba869a4b3292d7d4f72f5da4024b4f002",
+            "content": "0c8768055e4e20e7c7259608b67799171b691140",
+        }),
+        ("https://imgbox.com/qHhw7lpH", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
 
     def __init__(self, match):
         Extractor.__init__(self)
diff --git a/gallery_dl/extractor/imgur.py b/gallery_dl/extractor/imgur.py
index 7f1d4aa5..b900c706 100644
--- a/gallery_dl/extractor/imgur.py
+++ b/gallery_dl/extractor/imgur.py
@@ -18,10 +18,15 @@ class ImgurAlbumExtractor(Extractor):
     directory_fmt = ["{category}", "{album-key} - {title}"]
     filename_fmt = "{category}_{album-key}_{num:>03}_{hash}{ext}"
     pattern = [r"(?:https?://)?(?:m\.|www\.)?imgur\.com/(?:a|gallery)/([^/?&#]+)"]
-    test = [("https://imgur.com/a/TcBmP", {
-        "url": "ce3552f550a5b5316bd9c7ae02e21e39f30c0563",
-        "keyword": "21723f47bf4a42599d39fbf29c5f79323d420898",
-    })]
+    test = [
+        ("https://imgur.com/a/TcBmP", {
+            "url": "ce3552f550a5b5316bd9c7ae02e21e39f30c0563",
+            "keyword": "21723f47bf4a42599d39fbf29c5f79323d420898",
+        }),
+        ("https://imgur.com/a/TcBmQ", {
+            "exception": exception.NotFoundError,
+        }),
+    ]
 
     def __init__(self, match):
         Extractor.__init__(self)