diff --git a/chipsec/modules/tools/smm/smm_ptr.py b/chipsec/modules/tools/smm/smm_ptr.py
index cb19fb45cc..c0f307603b 100644
--- a/chipsec/modules/tools/smm/smm_ptr.py
+++ b/chipsec/modules/tools/smm/smm_ptr.py
@@ -215,6 +215,8 @@ def clear(self):
         self.confirmed = False
 
     def add(self, duration, code, data, gprs, confirmed=False):
+        if duration is None:
+            return
         if not self.code:
             self.code = code
         outlier = self.is_outlier(duration)
@@ -444,6 +446,7 @@ def smi_fuzz_iter(self, thread_id, _addr, _smi_desc, fill_contents=True, restore
         if not scan:
             self.send_smi(thread_id, _smi_desc.smi_code, _smi_desc.smi_data, _smi_desc.name, _smi_desc.desc, _rax, _rbx, _rcx, _rdx, _rsi, _rdi)
         else:
+            duration = None
             _, duration = self.send_smi_timed(thread_id, _smi_desc.smi_code, _smi_desc.smi_data, _smi_desc.name, _smi_desc.desc, _rax, _rbx, _rcx, _rdx, _rsi, _rdi)
             #
             # Re-do the call if it was identified as an outlier, due to periodic SMI delays
@@ -484,7 +487,7 @@ def test_config(self, thread_id, _smi_config_fname, _addr, _addr1):
         for line in fcfg:
             if '' == line.strip():
                 self.logger.log(f'\n[*] Testing SMI# 0x{_smi_desc.smi_code:02X} (data: 0x{_smi_desc.smi_data:02X}) {_smi_desc.name} ({_smi_desc.desc})')
-                if selfsmi_fuzz_iter(thread_id, _addr, _smi_desc):
+                if self.smi_fuzz_iter(thread_id, _addr, _smi_desc):
                     bad_ptr_cnt += 1
                 _smi_desc = None
                 _smi_desc = smi_desc()
@@ -608,7 +611,7 @@ def test_fuzz(self, thread_id, smic_start, smic_end, _addr, _addr1, scan_mode=Tr
                     if scan and scan.skip():
                         break
                 if scan_mode:
-                    msg = scan.log_smi_result(self.logger)
+                    scan.log_smi_result(self.logger)
                     scan.clear()
 
         return bad_ptr_cnt, scan
@@ -709,12 +712,13 @@ def run(self, module_argv):
                 bad_ptr_cnt, _ = self.test_fuzz(thread_id, smic_start, smic_end, _addr, _addr1)
             elif test_mode in ['scan']:
                 scan_mode =  True
+                scan = None
                 bad_ptr_cnt, scan = self.test_fuzz(thread_id, smic_start, smic_end, _addr, _addr1, True)
         except BadSMIDetected as msg:
             bad_ptr_cnt = 1
             self.logger.log_important("Potentially bad SMI detected! Stopped fuzing (see FUZZ_BAIL_ON_1ST_DETECT option)")
 
-        if scan_mode:
+        if scan_mode and scan:
             self.logger.log_good(f'<<< Done: found {scan.get_total_outliers()} long-running SMIs')
         if bad_ptr_cnt > 0:
             self.logger.log_bad(f'<<< Done: found {bad_ptr_cnt:d} potential occurrences of unchecked input pointers')