diff --git a/autotests/samplefiles/testexternalextractor/main.py b/autotests/samplefiles/testexternalextractor/main.py
--- a/autotests/samplefiles/testexternalextractor/main.py
+++ b/autotests/samplefiles/testexternalextractor/main.py
@@ -1,9 +1,6 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 
 import sys
-import subprocess
-import os.path
-import os
 import json
 
 extractor_data = json.loads(sys.stdin.read())
diff --git a/autotests/samplefiles/testexternalwriter/main.py b/autotests/samplefiles/testexternalwriter/main.py
--- a/autotests/samplefiles/testexternalwriter/main.py
+++ b/autotests/samplefiles/testexternalwriter/main.py
@@ -1,9 +1,6 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 
 import sys
-import subprocess
-import os.path
-import os
 import json
 
 writer_data = json.loads(sys.stdin.read())