diff --git a/lib/backend.py b/lib/backend.py
index f0ce380..51273f6 100644
--- a/lib/backend.py
+++ b/lib/backend.py
@@ -1104,6 +1104,7 @@
 
   return result
 
+
 def VerifyNodeNetTest(my_name, test_config):
   """Verify nodes are reachable.
 
@@ -1146,6 +1147,7 @@
                         " and ".join(fail))
   return result
 
+
 def VerifyMasterIP(my_name, test_config):
   """Verify master IP is reachable.
 
diff --git a/lib/cmdlib/cluster/verify.py b/lib/cmdlib/cluster/verify.py
index 0036f69..8785fbc 100644
--- a/lib/cmdlib/cluster/verify.py
+++ b/lib/cmdlib/cluster/verify.py
@@ -779,8 +779,8 @@
 
     if constants.NV_MASTERIP not in nresult:
       self._ErrorMsg(constants.CV_ENODENET, ninfo.name,
-                    "node hasn't returned node master IP reachability data")
-    elif nresult[constants.NV_MASTERIP] == False: # be explicit, could be None
+                     "node hasn't returned node master IP reachability data")
+    elif nresult[constants.NV_MASTERIP] == False:  # be explicit, could be None
       if ninfo.uuid == self.master_node:
         msg = "the master node cannot reach the master IP (not configured?)"
       else:
diff --git a/lib/http/server.py b/lib/http/server.py
index 8b3a4ee..9a4563e 100644
--- a/lib/http/server.py
+++ b/lib/http/server.py
@@ -423,7 +423,8 @@
           try:
             http.Handshake(sock, self.WRITE_TIMEOUT)
           except http.HttpSessionHandshakeUnexpectedEOF:
-            logging.debug("Unexpected EOF from %s:%s" % (client_addr[0], client_addr[1]))
+            logging.debug("Unexpected EOF from %s:%s",
+                          client_addr[0], client_addr[1])
             # Ignore rest
             return
 
@@ -609,8 +610,9 @@
         t_setup = time.time()
         self.request_executor(self, self.handler, connection, client_addr)
         t_end = time.time()
-        logging.debug("Request from %s:%s executed in: %.4f [setup: %.4f] [workers: %d]" % (
-            client_addr[0], client_addr[1], t_end - t_start, t_setup - t_start, len(self._children)))
+        logging.debug("Request from %s:%s executed in: %.4f [setup: %.4f] "
+                      "[workers: %d]", client_addr[0], client_addr[1],
+                      t_end - t_start, t_setup - t_start, len(self._children))
 
       except Exception: # pylint: disable=W0703
         logging.exception("Error while handling request from %s:%s",
diff --git a/lib/storage/bdev.py b/lib/storage/bdev.py
index 1f95004..7c1897c 100644
--- a/lib/storage/bdev.py
+++ b/lib/storage/bdev.py
@@ -510,7 +510,6 @@
       logging.warning("lvs command returned an empty output, the LV cache will"
                       "be empty!")
       return {}
-    info = {}
     return dict([LogicalVolume._ParseLvInfoLine(line, sep) for line in out])
 
   def Attach(self, lv_info=None):