diff --git a/gallery_dl/extractor/kissmanga.py b/gallery_dl/extractor/kissmanga.py
index 3711bbb0..0cf8b2ad 100644
--- a/gallery_dl/extractor/kissmanga.py
+++ b/gallery_dl/extractor/kissmanga.py
@@ -118,35 +118,32 @@ class KissmangaChapterExtractor(KissmangaExtractor):
         return []
 
     def build_aes_key(self, page):
-        chko = ""
+        chko = self._chko_from_external_script()
+
         for script in self._scripts(page):
-            for part in [p.strip() for p in script.split(";")]:
+            for stmt in [s.strip() for s in script.split(";")]:
 
-                if part.startswith("var _"):
-                    name, _, value = part[4:].partition(" = ")
+                if stmt.startswith("var _"):
+                    name, _, value = stmt[4:].partition(" = ")
                     name += "[0]"
                     value = ast.literal_eval(value)[0]
 
-                elif part.startswith("chko = "):
-                    part = part[7:]
-                    if part == name:
+                elif stmt.startswith("chko = "):
+                    stmt = stmt[7:]
+                    if stmt == name:
                         chko = value
-                    elif part == "chko + " + name:
-                        if not chko:
-                            chko = self._chko_from_external_script()
+                    elif stmt == "chko + " + name:
                         chko = chko + value
-                    elif part == name + " + chko":
-                        if not chko:
-                            chko = self._chko_from_external_script()
+                    elif stmt == name + " + chko":
                         chko = value + chko
                     else:
-                        self.log.warning("unrecognized expression: '%s'", part)
+                        self.log.warning("unrecognized expression: '%s'", stmt)
 
-                elif part.startswith("key = "):
+                elif stmt.startswith("key = "):
                     pass
 
                 else:
-                    self.log.warning("unrecognized statement: '%s'", part)
+                    self.log.warning("unrecognized statement: '%s'", stmt)
 
         return list(hashlib.sha256(chko.encode("ascii")).digest())
 
diff --git a/gallery_dl/extractor/pawoo.py b/gallery_dl/extractor/pawoo.py
index 2ab43d6b..7369cc5b 100644
--- a/gallery_dl/extractor/pawoo.py
+++ b/gallery_dl/extractor/pawoo.py
@@ -56,8 +56,8 @@ class PawooAccountExtractor(PawooExtractor):
     pattern = [r"(?:https?://)?pawoo\.net/(@[^/]+)/?$"]
     test = [
         ("https://pawoo.net/@kuroda", {
-            "url": "1507de8fe69a35d9ceb837c7082e25425eeed593",
-            "keyword": "ece8ba650f6f1519949bc94fd06c37721fc2f65e",
+            "url": "a3f9e7555f2b024554c0e9b6cbcc7991af13cf99",
+            "keyword": "9ef830113658fa15ed0b931bc3c650c417613162",
         }),
         ("https://pawoo.net/@zZzZz/", {
             "exception": exception.NotFoundError,
@@ -84,8 +84,8 @@ class PawooStatusExtractor(PawooExtractor):
     pattern = [r"(?:https?://)?pawoo\.net/@[^/]+/(\d+)"]
     test = [
         ("https://pawoo.net/@takehana_note/559043", {
-            "url": "bff6f435c0101a911eebd985d6b752c2b61721ef",
-            "keyword": "752615b20fb9490f18da69ce3822343e03ec61ff",
+            "url": "f95cc8c0274c4143e7e21dbdc693b90c65b596e3",
+            "keyword": "4fa98754e1bee4be244fd72d01a1cefdc12f9fbb",
             "content": "3b148cf90174173355fe34179741ce476921b2fc",
         }),
         ("https://pawoo.net/@zZzZz/12346", {
diff --git a/gallery_dl/extractor/yonkouprod.py b/gallery_dl/extractor/yonkouprod.py
index 698240c9..56dcaa10 100644
--- a/gallery_dl/extractor/yonkouprod.py
+++ b/gallery_dl/extractor/yonkouprod.py
@@ -25,6 +25,6 @@ class YonkouprodMangaExtractor(foolslide.FoolslideMangaExtractor):
     """Extractor for manga from yonkouprod.com"""
     category = "yonkouprod"
     pattern = foolslide.manga_pattern(r"(?:www\.)?yonkouprod\.com/reader")
-    test = [("https://yonkouprod.com/reader/series/attack-on-titan/", {
-        "url": "33bc7a08a6fbf41cf609bdd000d16893d55a3f29",
+    test = [("https://yonkouprod.com/reader/series/one-punch-man/", {
+        "url": "e17ed7a2098e2f18e50b64a28a810f62687d05e2",
     })]