diff --git a/test/.luacheckrc b/test/.luacheckrc
index c9522b1117..a2771a6d55 100644
--- a/test/.luacheckrc
+++ b/test/.luacheckrc
@@ -2,3 +2,7 @@
 
 std = '+luajit +busted'
 cache = true
+exclude_files = {
+  'benchmark/preload.lua',
+  'unit/preload.lua'
+}
diff --git a/test/benchmark/bench_re_freeze_spec.lua b/test/benchmark/bench_re_freeze_spec.lua
index 7242f43c8e..d40d9f9ece 100644
--- a/test/benchmark/bench_re_freeze_spec.lua
+++ b/test/benchmark/bench_re_freeze_spec.lua
@@ -1,7 +1,7 @@
 -- Test for benchmarking RE engine.
 
 local helpers = require('test.functional.helpers')
-local feed, insert, source = helpers.feed, helpers.insert, helpers.source
+local insert, source = helpers.insert, helpers.source
 local clear, execute, wait = helpers.clear, helpers.execute, helpers.wait
 
 -- Temporary file for gathering benchmarking results for each regexp engine.