diff --git a/.travis.yml b/.travis.yml
index 66918fd..1ff94bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,9 +7,9 @@ install:
     - pip install flake8 -r requirements.txt
 before_script:
     # stop the build if there are Python syntax errors or undefined names
-    - flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+    - flake8 bin lib --count --select=E9,F63,F7,F82 --show-source --statistics
     # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
-    - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - flake8 bin lib --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 script:
     - true  # pytest --capture=sys  # add other tests here
 notifications:
diff --git a/lib/spark.py b/lib/spark.py
index 2d740e5..0c7baef 100644
--- a/lib/spark.py
+++ b/lib/spark.py
@@ -43,7 +43,7 @@ import translations
 import wttr_line
 
 if not sys.version_info >= (3, 0):
-    reload(sys)
+    reload(sys) # noqa: F821
     sys.setdefaultencoding("utf-8")
 
 # data processing {{{