diff --git a/swh/lister/golang/lister.py b/swh/lister/golang/lister.py
index 368c1d0849637ba24eb7d5fcbd535faa533ca166..5e676b0298c8d36de409b3f7a01d08c51acb904d 100644
--- a/swh/lister/golang/lister.py
+++ b/swh/lister/golang/lister.py
@@ -73,9 +73,9 @@ class GolangLister(Lister[GolangStateType, GolangPageType]):
 
     def state_to_dict(self, state: GolangStateType) -> Dict[str, Any]:
         return {
-            "last_seen": state.last_seen.isoformat()
-            if state.last_seen is not None
-            else None
+            "last_seen": (
+                state.last_seen.isoformat() if state.last_seen is not None else None
+            )
         }
 
     def finalize(self):
@@ -135,7 +135,7 @@ class GolangLister(Lister[GolangStateType, GolangPageType]):
             # The index returns packages whose timestamp are greater or
             # equal to the date provided as parameter, which will create
             # an infinite loop if not stopped here.
-            return [], since
+            return
         if since is not None:
             self.state.last_seen = since
 
@@ -143,7 +143,7 @@ class GolangLister(Lister[GolangStateType, GolangPageType]):
             yield page
             page, since = self.get_single_page(since=since)
             if since == self.state.last_seen:
-                return [], since
+                return
             if since is not None:
                 self.state.last_seen = since
 
diff --git a/swh/lister/packagist/lister.py b/swh/lister/packagist/lister.py
index ba7ac12fa4151680e4b7136bb646148389ddf443..fea1952219b7bd8236b308d1bdea94191f6af46a 100644
--- a/swh/lister/packagist/lister.py
+++ b/swh/lister/packagist/lister.py
@@ -47,7 +47,7 @@ class PackagistLister(Lister[PackagistListerState, PackagistPageType]):
 
     For each package, its metadata are retrieved using Packagist API endpoints
     whose responses are served from static files, which are guaranteed to be
-    efficient on the Packagist side (no dymamic queries).
+    efficient on the Packagist side (no dynamic queries).
     Furthermore, subsequent listing will send the "If-Modified-Since" HTTP
     header to only retrieve packages metadata updated since the previous listing
     operation in order to save bandwidth and return only origins which might have