diff --git a/src/daemon.py b/src/daemon.py
index d62277b..e0dc358 100644
--- a/src/daemon.py
+++ b/src/daemon.py
@@ -136,7 +136,7 @@ class Daemon(object):  # pragma: no cover
         # Fork a child and end parent (so init now owns process)
         pid = os.fork()
         if pid > 0:
-            self.log.info("PID = %s", (pid))
+            self.log.info("PID = %s", pid)
             pidfile = file(self.pid_file, 'w')
             pidfile.write(str(pid))
             pidfile.close()
@@ -165,7 +165,7 @@ class Daemon(object):  # pragma: no cover
         """
         Remvoe pid files and call registered shutodnw callbacks.
         """
-        self.log.info("Received signal %s", (sig))
+        self.log.info("Received signal %s", sig)
         if os.path.exists(self.pid_file):
             os.unlink(self.pid_file)
         self.shutdown_callback()
diff --git a/src/runscript.py b/src/runscript.py
index e6b5736..c75e083 100644
--- a/src/runscript.py
+++ b/src/runscript.py
@@ -61,14 +61,14 @@ def run_script(form_def, form_values, stdout=None, stderr=None):
         ]
         msg = "Running script as user={0}, gid={1}, groups={2}"
         run_as_fn = run_as(runas_pw.pw_uid, runas_pw.pw_gid, groups)
-        log.info("%s", (msg.format(runas_pw.pw_name,
-                                   runas_gr.gr_name,
-                                   str(groups))))
+        log.info("%s", msg.format(runas_pw.pw_name,
+                                  runas_gr.gr_name,
+                                  str(groups)))
     else:
         run_as_fn = None
         if form_def.run_as is not None:
             log.critical("Not running as root, so we can't run the "
-                         "script as user '%s'", (form_def.run_as))
+                         "script as user '%s'", form_def.run_as)
 
     # If the form output type is 'raw', we directly stream the output to
     # the browser. Otherwise we store it for later displaying.
@@ -82,7 +82,7 @@ def run_script(form_def, form_values, stdout=None, stderr=None):
                                     close_fds=True,
                                     preexec_fn=run_as_fn)
             stdout, stderr = proc.communicate(input)
-            log.info("Exit code: %s", (proc.returncode))
+            log.info("Exit code: %s", proc.returncode)
             return proc.returncode
         except OSError as err:
             log.exception(err)
@@ -99,7 +99,7 @@ def run_script(form_def, form_values, stdout=None, stderr=None):
                                     close_fds=True,
                                     preexec_fn=run_as_fn)
             stdout, stderr = proc.communicate()
-            log.info("Exit code: %s", (proc.returncode))
+            log.info("Exit code: %s", proc.returncode)
             return {
                 'stdout': stdout,
                 'stderr': stderr,
diff --git a/src/scriptform.py b/src/scriptform.py
index 6e26f5e..02f0649 100755
--- a/src/scriptform.py
+++ b/src/scriptform.py
@@ -139,7 +139,7 @@ class ScriptForm(object):
         self.httpd = ThreadedHTTPServer((listen_addr, listen_port),
                                         ScriptFormWebApp)
         self.httpd.daemon_threads = True
-        self.log.info("Listening on %s:%s", (listen_addr, listen_port))
+        self.log.info("Listening on %s:%s", listen_addr, listen_port)
         self.running = True
         self.httpd.serve_forever()
         self.running = False
diff --git a/src/webapp.py b/src/webapp.py
index 6475bac..ebc8a98 100644
--- a/src/webapp.py
+++ b/src/webapp.py
@@ -413,10 +413,10 @@ class ScriptFormWebApp(RequestHandler):
             # Log the callback and its parameters for auditing purposes.
             log = logging.getLogger('CALLBACK_AUDIT')
             cwd = os.path.realpath(os.curdir)
-            log.info("Calling script: %s", (form_def.script))
-            log.info("Current working dir: %s", (cwd))
-            log.info("User: %s", (username))
-            log.info("Variables: %s", (dict(form_values.items())))
+            log.info("Calling script: %s", form_def.script)
+            log.info("Current working dir: %s", cwd)
+            log.info("User: %s", username)
+            log.info("Variables: %s", dict(form_values.items()))
 
             form_def = form_config.get_form_def(form_name)
             result = runscript.run_script(form_def, form_values, self.wfile,