diff --git a/proxy/common/types.py b/proxy/common/types.py
index a95a49e8d2..d8f13de9ba 100644
--- a/proxy/common/types.py
+++ b/proxy/common/types.py
@@ -22,10 +22,7 @@
 else:
     from typing_extensions import Protocol
 
-if TYPE_CHECKING:
-    DictQueueType = queue.Queue[Dict[str, Any]]    # pragma: no cover
-else:
-    DictQueueType = queue.Queue
+DictQueueType = queue.Queue[Dict[str, Any]] if TYPE_CHECKING else queue.Queue
 
 
 class HasFileno(Protocol):
diff --git a/proxy/core/event/dispatcher.py b/proxy/core/event/dispatcher.py
index f65d5bf892..2dc5f5ee61 100644
--- a/proxy/core/event/dispatcher.py
+++ b/proxy/core/event/dispatcher.py
@@ -84,11 +84,7 @@ def run(self) -> None:
                     self.run_once()
                 except queue.Empty:
                     pass
-        except BrokenPipeError:
-            pass
-        except EOFError:
-            pass
-        except KeyboardInterrupt:
+        except (BrokenPipeError, EOFError, KeyboardInterrupt):
             pass
         except Exception as e:
             logger.exception('Event dispatcher exception', exc_info=e)
diff --git a/proxy/core/event/subscriber.py b/proxy/core/event/subscriber.py
index 841fe12f5b..bbca3cceda 100644
--- a/proxy/core/event/subscriber.py
+++ b/proxy/core/event/subscriber.py
@@ -61,11 +61,8 @@ def unsubscribe(self) -> None:
 
         try:
             self.event_queue.unsubscribe(self.relay_sub_id)
-        except BrokenPipeError:
+        except (BrokenPipeError, EOFError):
             pass
-        except EOFError:
-            pass
-
         self.relay_shutdown.set()
         self.relay_thread.join()
         logger.debug(
diff --git a/proxy/plugin/filter_by_url_regex.py b/proxy/plugin/filter_by_url_regex.py
index c9e9407111..2b66867532 100644
--- a/proxy/plugin/filter_by_url_regex.py
+++ b/proxy/plugin/filter_by_url_regex.py
@@ -59,9 +59,8 @@ def handle_client_request(
         request_host = None
         if request.host:
             request_host = request.host
-        else:
-            if b'host' in request.headers:
-                request_host = request.header(b'host')
+        elif b'host' in request.headers:
+            request_host = request.header(b'host')
 
         if not request_host:
             logger.error("Cannot determine host")
@@ -72,9 +71,7 @@ def handle_client_request(
             request_host,
             request.path,
         )
-        # check URL against list
-        rule_number = 1
-        for blocked_entry in self.filters:
+        for rule_number, blocked_entry in enumerate(self.filters, start=1):
             # if regex matches on URL
             if re.search(text_(blocked_entry['regex']), text_(url)):
                 # log that the request has been filtered
@@ -92,10 +89,6 @@ def handle_client_request(
                     headers={b'Connection': b'close'},
                     reason=b'Blocked',
                 )
-                # stop looping through filter list
-                break
-            # increment rule number
-            rule_number += 1
         return request
 
     def handle_upstream_chunk(self, chunk: memoryview) -> memoryview:
diff --git a/proxy/plugin/reverse_proxy.py b/proxy/plugin/reverse_proxy.py
index 3095282d9c..44c2afacc6 100644
--- a/proxy/plugin/reverse_proxy.py
+++ b/proxy/plugin/reverse_proxy.py
@@ -59,7 +59,7 @@ def handle_request(self, request: HttpParser) -> None:
         upstream = random.choice(ReverseProxyPlugin.REVERSE_PROXY_PASS)
         url = urlparse.urlsplit(upstream)
         assert url.hostname
-        with socket_connection((text_(url.hostname), url.port if url.port else DEFAULT_HTTP_PORT)) as conn:
+        with socket_connection((text_(url.hostname), url.port or DEFAULT_HTTP_PORT)) as conn:
             conn.send(request.build())
             self.client.queue(memoryview(conn.recv(DEFAULT_BUFFER_SIZE)))