diff --git a/lib/face_control/checker_runner.rb b/lib/face_control/checker_runner.rb
index b5c0c9a..698abfb 100644
--- a/lib/face_control/checker_runner.rb
+++ b/lib/face_control/checker_runner.rb
@@ -18,6 +18,8 @@ def comments
     private
 
     def relevant_filenames
+      return @filenames unless @checker.respond_to?(:relevant_globs)
+
       @relevant_filenames ||= @checker.relevant_globs.map do |glob|
         @filenames.select do |filename|
           File.fnmatch?(glob, filename)
diff --git a/lib/face_control/checkers/_example.rb b/lib/face_control/checkers/_example.rb
index f620016..b54eeae 100644
--- a/lib/face_control/checkers/_example.rb
+++ b/lib/face_control/checkers/_example.rb
@@ -7,6 +7,7 @@ class Example
       # Define only if you use @options in the following methods
       attr_writer :options
 
+      # @optional
       # @return [Array<String>] Shell globs to filter only files relevant to this checker
       #                         out of all files with added lines in the pull request
       def relevant_globs
diff --git a/test/face_control/checker_runner_test.rb b/test/face_control/checker_runner_test.rb
index ecacef7..faeba6d 100644
--- a/test/face_control/checker_runner_test.rb
+++ b/test/face_control/checker_runner_test.rb
@@ -1,17 +1,22 @@
 require 'test_helper'
 
-class TestChecker
+class CheckerWithoutGlobs
+end
+
+class CheckerWithGlobs
   def relevant_globs
     %w(*.rb Rakefile)
   end
 end
 
 class CheckerRunnerTest < Minitest::Test
-  def setup
-    @runner = FaceControl::CheckerRunner.new(TestChecker, %w(config/file.yml Rakefile assets/foo.coffee lib/foo.rb))
+  def test_relevant_filenames_without_globs
+    runner = FaceControl::CheckerRunner.new(CheckerWithoutGlobs, %w(config/file.yml lib/foo.rb))
+    assert_equal %w(config/file.yml lib/foo.rb), runner.send(:relevant_filenames)
   end
 
-  def test_relevant_filenames
-    assert_equal %w(lib/foo.rb Rakefile), @runner.send(:relevant_filenames)
+  def test_relevant_filenames_with_globs
+    runner = FaceControl::CheckerRunner.new(CheckerWithGlobs, %w(config/file.yml Rakefile assets/foo.coffee lib/foo.rb))
+    assert_equal %w(lib/foo.rb Rakefile), runner.send(:relevant_filenames)
   end
 end