diff --git a/gallery_dl/extractor/readcomiconline.py b/gallery_dl/extractor/readcomiconline.py
index e1c7df3b..f6f6e91b 100644
--- a/gallery_dl/extractor/readcomiconline.py
+++ b/gallery_dl/extractor/readcomiconline.py
@@ -48,12 +48,8 @@ class ReadcomiconlineIssueExtractor(ReadcomiconlineBase, ChapterExtractor):
     pattern = BASE_PATTERN + r"(/Comic/[^/?#]+/[^/?#]+\?)([^#]+)"
     example = "https://readcomiconline.li/Comic/TITLE/Issue-123?id=12345"
 
-    def __init__(self, match):
-        ChapterExtractor.__init__(self, match)
-        self.params = match[2]
-
     def _init(self):
-        params = text.parse_query(self.params)
+        params = text.parse_query(self.groups[1])
         quality = self.config("quality")
 
         if quality is None or quality == "auto":
@@ -61,8 +57,9 @@ class ReadcomiconlineIssueExtractor(ReadcomiconlineBase, ChapterExtractor):
                 params["quality"] = "hq"
         else:
             params["quality"] = str(quality)
+        params["readType"] = "0"  # force "One page" Reading mode (#7890)
 
-        self.page_url += "&".join(k + "=" + v for k, v in params.items())
+        self.page_url += "&".join(f"{k}={v}" for k, v in params.items())
         self.issue_id = params.get("id")
 
     def metadata(self, page):
diff --git a/test/results/readcomiconline.py b/test/results/readcomiconline.py
index 0f316a7c..ba85e4fa 100644
--- a/test/results/readcomiconline.py
+++ b/test/results/readcomiconline.py
@@ -10,25 +10,52 @@ from gallery_dl.extractor import readcomiconline
 __tests__ = (
 {
     "#url"     : "https://readcomiconline.li/Comic/W-i-t-c-h/Issue-130?id=22289",
-    "#category": ("", "readcomiconline", "issue"),
     "#class"   : readcomiconline.ReadcomiconlineIssueExtractor,
     "#pattern"      : r"https://2\.bp\.blogspot\.com/[\w-]+=s0\?.+",
     "#count"        : 36,
     "#sha1_metadata": "2d9ec81ce1b11fac06ebf96ce33cdbfca0e85eb5",
+
+    "comic"      : "W.i.t.c.h.",
+    "count"      : 36,
+    "extension"  : "",
+    "filename"   : str,
+    "issue"      : "130",
+    "issue_id"   : 22289,
+    "lang"       : "en",
+    "language"   : "English",
+    "page"       : range(1, 36),
+},
+
+{
+    "#url"     : "https://readcomiconline.li/Comic/Captain-Planet/Issue-1?id=238698&s=&readType=1",
+    "#comment" : "'One page' Reading mode (#7890)",
+    "#class"   : readcomiconline.ReadcomiconlineIssueExtractor,
+    "#pattern" : r"https://2\.bp\.blogspot\.com/pw/[\w-]+=s0\?.+",
+    "#count"   : 31,
+
+    "comic"      : "Captain Planet",
+    "count"      : 31,
+    "extension"  : "",
+    "filename"   : str,
+    "issue"      : "1",
+    "issue_id"   : 238698,
+    "lang"       : "en",
+    "language"   : "English",
+    "page"       : range(1, 31),
 },
 
 {
     "#url"     : "https://readcomiconline.li/Comic/W-i-t-c-h",
-    "#category": ("", "readcomiconline", "comic"),
     "#class"   : readcomiconline.ReadcomiconlineComicExtractor,
+    "#pattern" : readcomiconline.ReadcomiconlineIssueExtractor.pattern,
     "#sha1_url"     : "74eb8b9504b4084fcc9367b341300b2c52260918",
     "#sha1_metadata": "574051aaf7a5c92dafed9e94baa40a1a93db5c90",
 },
 
 {
     "#url"     : "https://readcomiconline.to/Comic/Bazooka-Jules",
-    "#category": ("", "readcomiconline", "comic"),
     "#class"   : readcomiconline.ReadcomiconlineComicExtractor,
+    "#pattern" : readcomiconline.ReadcomiconlineIssueExtractor.pattern,
     "#sha1_url"     : "2f66a467a772df4d4592e97a059ddbc3e8991799",
     "#sha1_metadata": "9563a19454e1b4e0da5b7a28112bf00a3e8069a8",
 },