diff --git a/jc/parsers/vmstat_s.py b/jc/parsers/vmstat_s.py
index 2877dc6f..e4c71343 100644
--- a/jc/parsers/vmstat_s.py
+++ b/jc/parsers/vmstat_s.py
@@ -113,7 +113,7 @@ def _process(proc_data):
         ts = jc.utils.timestamp(f'{proc_data["timestamp"]} {proc_data["timezone"]}')
         proc_data['epoch'] = ts.naive
         proc_data['epoch_utc'] = ts.utc
-    
+
     return proc_data
 
 
@@ -155,12 +155,12 @@ def parse(data, raw=False, quiet=False, ignore_exceptions=False):
             # detect output type
             if not procs and not disk and line.startswith('procs'):
                 procs = True
-                tstamp = True if '-timestamp-' in line else False
+                tstamp = '-timestamp-' in line
                 continue
 
             if not procs and not disk and line.startswith('disk'):
                 disk = True
-                tstamp = True if '-timestamp-' in line else False
+                tstamp = '-timestamp-' in line
                 continue
 
 
@@ -170,7 +170,7 @@ def parse(data, raw=False, quiet=False, ignore_exceptions=False):
                 tz = line.strip().split()[-1] if tstamp else None
                 continue
 
-            elif 'swpd' in line and 'free' in line and 'inact' in line and  'active' in line:
+            if 'swpd' in line and 'free' in line and 'inact' in line and  'active' in line:
                 buff_cache = False
                 tz = line.strip().split()[-1] if tstamp else None
                 continue
@@ -227,6 +227,6 @@ def parse(data, raw=False, quiet=False, ignore_exceptions=False):
                 }
 
             yield stream_success(output_line, ignore_exceptions) if raw else stream_success(_process(output_line), ignore_exceptions)
-            
+
         except Exception as e:
             yield stream_error(e, ignore_exceptions, line)