diff --git a/spec/expression/methods/printing_spec.rb b/spec/expression/methods/printing_spec.rb
index 6646a15..27ac6e5 100644
--- a/spec/expression/methods/printing_spec.rb
+++ b/spec/expression/methods/printing_spec.rb
@@ -19,7 +19,7 @@
 
 RSpec.describe('Expression::Shared#pretty_print') do
   it 'works' do
-    require 'pp' # rubocop:disable Lint/RedundantRequireStatement
+    require 'pp'
     pp_to_s = ->(arg) { ''.dup.tap { |buffer| PP.new(buffer).pp(arg) } }
 
     root = Regexp::Parser.parse(/(a)+/)
diff --git a/spec/scanner/sets_spec.rb b/spec/scanner/sets_spec.rb
index e8a72c2..1ce6f45 100644
--- a/spec/scanner/sets_spec.rb
+++ b/spec/scanner/sets_spec.rb
@@ -87,7 +87,8 @@
   include_examples 'scan', /[a-bd-f]/,              2 => [:set,     :range,          '-',          2, 3]
   include_examples 'scan', /[a-cd-f]/,              5 => [:set,     :range,          '-',          5, 6]
   # this is a buggy range, it matches only `c`, but not `a`, `b` or `-`
-  include_examples 'scan', /[a-[c]]/,               2 => [:set,     :range,          '-',          2, 3]
+  # (this is a string to work around a rubocop error in Lint/MixedCaseRange)
+  include_examples 'scan', '[a-[c]]',               2 => [:set,     :range,          '-',          2, 3]
   # these are not ranges, they match `a`, `c` and `-` (or non-`-` if negated)
   include_examples 'scan', /[[a]-[c]]/,             4 => [:literal, :literal,        '-',          4, 5]
   include_examples 'scan', /[[a]-c]/,               4 => [:literal, :literal,        '-',          4, 5]