diff --git a/wa/instruments/serialmon.py b/wa/instruments/serialmon.py
index 1b5c137e..f91164a5 100644
--- a/wa/instruments/serialmon.py
+++ b/wa/instruments/serialmon.py
@@ -62,7 +62,7 @@ class SerialMon(Instrument):
         if self._collector.collecting:
             self._collector.stop()
             data = self._collector.get_data()
-            for l in data:
+            for l in data:  # noqa: E741
                 context.add_artifact("{}_serial_log".format(identifier),
                                      l.path, kind="log")
 
diff --git a/wa/utils/types.py b/wa/utils/types.py
index 6cf064cc..5968e60c 100644
--- a/wa/utils/types.py
+++ b/wa/utils/types.py
@@ -218,7 +218,7 @@ def version_tuple(v):
     return tuple(map(str, (v.split("."))))
 
 
-def module_name_set(l):
+def module_name_set(l):  # noqa: E741
     """
     Converts a list of target modules into a set of module names, disregarding
     any configuration that may be present.