diff --git a/README.md b/README.md
index 7e9ce33..e457c08 100644
--- a/README.md
+++ b/README.md
@@ -129,10 +129,10 @@ In no particular order, features that have been implemented and are planned:
     - [X] Dry run - for validation and checking formatted output
     - [X] Config block in `spec_helper.cr`
     - [X] Config file - `.spectator`
-- [ ] Reporter and formatting
+- [X] Reporter and formatting
     - [X] RSpec/Crystal Spec default
     - [X] JSON
-    - [ ] JUnit
+    - [X] JUnit
     - [X] TAP
 
 ### How it Works
diff --git a/src/spectator/command_line_arguments_config_source.cr b/src/spectator/command_line_arguments_config_source.cr
index 59a3347..cd8651a 100644
--- a/src/spectator/command_line_arguments_config_source.cr
+++ b/src/spectator/command_line_arguments_config_source.cr
@@ -23,7 +23,7 @@ module Spectator
         parser.on("-p", "--profile", "Display the 10 slowest specs") { raise NotImplementedError.new("-p") }
         parser.on("--location FILE:LINE", "Run the example at line 'LINE' in the file 'FILE', multiple allowed") { |location| raise NotImplementedError.new("--location") }
         parser.on("--json", "Generate JSON output") { builder.formatter = Formatting::JsonFormatter.new }
-        parser.on("--junit_output OUTPUT_DIR", "Generate JUnit XML output") { |output_dir| raise NotImplementedError.new("--juni_output") }
+        parser.on("--junit_output OUTPUT_DIR", "Generate JUnit XML output") { |output_dir| builder.add_formatter(Formatting::JUnitFormatter.new(output_dir)) }
         parser.on("--tap", "Generate TAP output (Test Anything Protocol)") { builder.formatter = Formatting::TAPFormatter.new }
         parser.on("--no-color", "Disable colored output") { raise NotImplementedError.new("--no-color") }
       end