diff --git a/lib/vernier/output/file_listing.rb b/lib/vernier/output/file_listing.rb
index b21d62d2..8227a6a2 100644
--- a/lib/vernier/output/file_listing.rb
+++ b/lib/vernier/output/file_listing.rb
@@ -20,8 +20,9 @@ def +(other)
         end
       end
 
-      def initialize(profile)
+      def initialize(profile, relevant_files_filter: nil)
         @profile = profile
+        @relevant_files_filter ||= -> (filename) { default_relevant_files_filter(filename) }
       end
 
       def samples_by_file
@@ -77,11 +78,9 @@ def samples_by_file
       def output(template: nil)
         output = +""
 
-        relevant_files = samples_by_file.select do |k, v|
-          next if k.start_with?("gem:")
-          next if k.start_with?("rubylib:")
-          next if k.start_with?("<")
-          v.values.map(&:total).sum > total * 0.01
+        relevant_files = samples_by_file.select do |filename, v|
+          @relevant_files_filter.call(filename) &&
+            v.values.map(&:total).sum > total * 0.01
         end
 
         if template == "html"
@@ -97,6 +96,12 @@ def output(template: nil)
         end
       end
 
+      def default_relevant_files_filter(filename)
+        !filename.start_with?("gem:") &&
+          !filename.start_with?("rubylib:") &&
+          !filename.start_with?("<")
+      end
+
       def total
         thread = @profile.main_thread
         thread[:weights].sum
@@ -116,7 +121,7 @@ def format_file(output, filename, all_samples, total:)
           else
             output << sprintf("       |        | % 4i  %s", lineno, line)
           end
-        end
+        end if File.exist?(filename)
       end
 
       def html_output(output, relevant_files)
@@ -145,7 +150,7 @@ def format_file_html(output, filename, relevant_files)
           else
             output << sprintf("       |        | % 4i  %s", lineno, CGI::escapeHTML(line))
           end
-        end
+        end if File.exist?(filename)
       end
     end
   end
diff --git a/test/output/test_file_listing.rb b/test/output/test_file_listing.rb
index 16a9de41..8367e3a8 100644
--- a/test/output/test_file_listing.rb
+++ b/test/output/test_file_listing.rb
@@ -30,10 +30,27 @@ def test_complex_profile
       assert_match(/\d+\.\d% \| *\d+\.\d% \| *\d+ +while Process\.clock_gettime/, output)
     end
 
-    def test_html_output
+    def test_complex_profile_html_output
       output = Vernier::Output::FileListing.new(@result).output(template: "html")
       assert_match(/<details style=\"display:inline-block;vertical-align:top;\"><summary>.+#{Regexp.escape(File.basename(__FILE__))}<\/summary>/, output)
     end
+
+    def test_complex_profile_default_exclude_irrelevant_files
+      file_listing = Vernier::Output::FileListing.new(@result)
+      output = file_listing.output
+      assert_includes(file_listing.samples_by_file.keys.join, "gem:")
+      refute_match(/^gem:/, output)
+    end
+
+    def test_complex_profile_customize_relevant_files
+      custom_relevant_files_filter = ->(filename) { filename == "lib/vernier.rb" }
+      file_listing = Vernier::Output::FileListing.new(@result, relevant_files_filter: custom_relevant_files_filter)
+      output = file_listing.output
+
+      assert_includes(file_listing.samples_by_file.keys.join, File.basename(__FILE__))
+      refute_match(File.basename(__FILE__), output)
+      assert_match("lib/vernier.rb", output)
+    end
   end
 
   describe "with a parsed profile" do
@@ -51,10 +68,26 @@ def test_parsed_profile
 TEXT
     end
 
-    def test_html_output
+    def test_parsed_profile_html_output
       output = Vernier::Output::FileListing.new(@profile).output(template: "html")
       assert_includes output,
         " 24.5%   <details style=\"display:inline-block;vertical-align:top;\"><summary>examples/gvl_sleep.rb</summary>\n"
     end
+
+    def test_parsed_profile_default_exclude_irrelevant_files
+      file_listing = Vernier::Output::FileListing.new(@profile)
+      output = file_listing.output
+      assert_includes(file_listing.samples_by_file.keys.join, "gem:")
+      refute_match(/^gem:/, output)
+    end
+
+    def test_parsed_profile_customize_relevant_files
+      custom_relevant_files_filter = ->(filename) { filename != "examples/gvl_sleep.rb" }
+      file_listing = Vernier::Output::FileListing.new(@profile, relevant_files_filter: custom_relevant_files_filter)
+      output = file_listing.output
+
+      assert_includes(file_listing.samples_by_file.keys.join, "examples/gvl_sleep.rb")
+      refute_match("examples/gvl_sleep.rb", output)
+    end
   end
 end