--- a/build/compare-mozconfig/compare-mozconfigs.py
+++ b/build/compare-mozconfig/compare-mozconfigs.py
@@ -31,18 +31,17 @@ def verify_mozconfigs(mozconfig_pair, ni
     are pairs containing the mozconfig's identifier and the list of lines in
     the mozconfig."""
 
     # unpack the pairs to get the names, the names are just for
     # identifying the mozconfigs when logging the error messages
     mozconfig_name, mozconfig_lines = mozconfig_pair
     nightly_mozconfig_name, nightly_mozconfig_lines = nightly_mozconfig_pair
 
-    missing_args = mozconfig_lines == [] or nightly_mozconfig_lines == []
-    if missing_args:
+    if not mozconfig_lines or not nightly_mozconfig_lines:
         log.info("Missing mozconfigs to compare for %s" % platform)
         return False
 
     success = True
 
     diff_instance = difflib.Differ()
     diff_result = diff_instance.compare(mozconfig_lines, nightly_mozconfig_lines)
     diff_list = list(diff_result)