diff --git a/Library/.rubocop_rules.yml b/Library/.rubocop_rules.yml
index 6d14287b60..915b2e570b 100644
--- a/Library/.rubocop_rules.yml
+++ b/Library/.rubocop_rules.yml
@@ -11,6 +11,10 @@ Style/StringLiteralsInInterpolation:
 Style/NumericLiterals:
   MinDigits: 7
 
+# zero-prefixed octal literals are just too widely used (and mostly understood)
+Style/NumericLiteralPrefix:
+  EnforcedOctalStyle: zero_only
+
 # percent-x is allowed for multiline
 Style/CommandLiteral:
   EnforcedStyle: mixed
@@ -62,14 +66,6 @@ Lint/ParenthesesAsGroupedExpression:
 Style/EmptyLineBetweenDefs:
   AllowAdjacentOneLineDefs: true
 
-# port numbers and such tech stuff
-Style/NumericLiterals:
-  Enabled: false
-
-# zero-prefixed octal literals are just too widely used (and mostly understood)
-Style/NumericLiteralPrefix:
-  EnforcedOctalStyle: zero_only
-
 # consistency and readability when faced with string interpolation
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
diff --git a/Library/.rubocop_todo.yml b/Library/.rubocop_todo.yml
index 3b5a91c5ec..0b29efe302 100644
--- a/Library/.rubocop_todo.yml
+++ b/Library/.rubocop_todo.yml
@@ -273,11 +273,6 @@ Style/MutableConstant:
     - 'Homebrew/tab.rb'
     - 'Homebrew/tap.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/NumericLiterals:
-  MinDigits: 6
-
 # Offense count: 9
 Style/OpMethod:
   Exclude:
diff --git a/Library/Homebrew/dev-cmd/test-bot.rb b/Library/Homebrew/dev-cmd/test-bot.rb
index aa3a496105..d63f88a1ca 100644
--- a/Library/Homebrew/dev-cmd/test-bot.rb
+++ b/Library/Homebrew/dev-cmd/test-bot.rb
@@ -185,8 +185,8 @@ module Homebrew
 
     def puts_result
       if ENV["TRAVIS"]
-        travis_start_time = @start_time.to_i*1000000000
-        travis_end_time = @end_time.to_i*1000000000
+        travis_start_time = @start_time.to_i * 1_000_000_000
+        travis_end_time = @end_time.to_i * 1_000_000_000
         travis_duration = travis_end_time - travis_start_time
         puts "#{Tty.white}==>#{Tty.green} PASSED#{Tty.reset}" if passed?
         puts "travis_time:end:#{@travis_timer_id},start=#{travis_start_time},finish=#{travis_end_time},duration=#{travis_duration}"
diff --git a/Library/Homebrew/test/test_download_strategies.rb b/Library/Homebrew/test/test_download_strategies.rb
index d107d14e8c..87218fb12b 100644
--- a/Library/Homebrew/test/test_download_strategies.rb
+++ b/Library/Homebrew/test/test_download_strategies.rb
@@ -118,7 +118,7 @@ class GitDownloadStrategyTests < Homebrew::TestCase
 
   def test_source_modified_time
     setup_git_repo
-    assert_equal 1242860651, @strategy.source_modified_time.to_i
+    assert_equal 1_242_860_651, @strategy.source_modified_time.to_i
   end
 
   def test_last_commit
diff --git a/Library/Homebrew/test/test_pathname.rb b/Library/Homebrew/test/test_pathname.rb
index 0cd2876d02..492c09c67a 100644
--- a/Library/Homebrew/test/test_pathname.rb
+++ b/Library/Homebrew/test/test_pathname.rb
@@ -26,7 +26,7 @@ class PathnameTests < Homebrew::TestCase
     mkdir_p @dir/"a-directory"
     touch @dir/".DS_Store"
     touch @dir/"a-file"
-    File.truncate(@dir/"a-file", 1048576)
+    File.truncate(@dir/"a-file", 1_048_576)
     ln_s @dir/"a-file", @dir/"a-symlink"
     ln @dir/"a-file", @dir/"a-hardlink"
     assert_equal 3, @dir.file_count