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-rw-r--r--railties/lib/rails/test_unit/runner.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/railties/lib/rails/test_unit/runner.rb b/railties/lib/rails/test_unit/runner.rb
index c777091b57..d84f1cf9af 100644
--- a/railties/lib/rails/test_unit/runner.rb
+++ b/railties/lib/rails/test_unit/runner.rb
@@ -14,6 +14,13 @@ module Rails
opts.separator ""
opts.separator "Filter options:"
+ opts.separator ""
+ opts.separator <<-DESC
+ You can run a single test by appending the line number to filename:
+
+ bin/rails test test/models/user_test.rb:27
+
+ DESC
opts.on("-n", "--name [NAME]",
"Only run tests matching NAME") do |name|