Fixed docker tests.

tox.ini

@@ -93,6 +93,7 @@ indent-string = "    "
 disable = 
         bad-continuation,
         broad-except,
+        duplicate-code,
         fixme,
         invalid-name,
         line-too-long,
@@ -125,9 +126,9 @@ max-module-lines = 2500
 
 [flake8]
 ignore =
-	E241,  # multiple spaces after operator; should be kept for tabular data
+        E241,  # multiple spaces after operator; should be kept for tabular data
         E303,  # too many blank lines
-	E501,  # line too long
+        E501,  # line too long
 
 [pytest]
 junit_family = xunit1