diff --git a/qa/pull-tester/rpc-tests.py b/qa/pull-tester/rpc-tests.py
--- a/qa/pull-tester/rpc-tests.py
+++ b/qa/pull-tester/rpc-tests.py
@@ -34,8 +34,8 @@
 from tests_config import *
 
 BOLD = ("", "")
-RED = ("","")
-GREEN = ("","")
+RED = ("", "")
+GREEN = ("", "")
 if os.name == 'posix':
     # primitive formatting on supported
     # terminal via ANSI escape sequences:
@@ -44,7 +44,6 @@
     GREEN = ("\033[0m", "\033[32m")
 
 
-
 RPC_TESTS_DIR = SRCDIR + '/qa/rpc-tests/'
 
 # If imported values are not defined then set to zero (or disabled)
@@ -250,9 +249,9 @@
         result = "%s | %s | %s s\n" % (
             name.ljust(max_len_name), str(passed).ljust(6), duration)
         if passed:
-            results+=GREEN[1]+result+GREEN[0]
+            results += GREEN[1] + result + GREEN[0]
         else:
-            results+=RED[1]+result+RED[0]
+            results += RED[1] + result + RED[0]
         print("Pass: %s%s%s, Duration: %s s\n" %
               (BOLD[1], passed, BOLD[0], duration))
     results += BOLD[1] + "\n%s | %s | %s s (accumulated)" % (
@@ -268,6 +267,7 @@
 
     sys.exit(not all_passed)
 
+
 class RPCTestHandler:
 
     """
@@ -320,7 +320,8 @@
                     passed = stderr == "" and proc.returncode == 0
                     self.num_running -= 1
                     self.jobs.remove(j)
-                    return name, stdout, stderr, passed, int(time.time() - time0)
+                    return name, stdout, stderr, passed, int(
+                        time.time() - time0)
             print('.', end='', flush=True)