4 files changed, 21 insertions, 7 deletions
diff --git a/railties/lib/rails/test_unit/minitest_plugin.rb b/railties/lib/rails/test_unit/minitest_plugin.rb
index 8e5301d1e0..dacab08ec3 100644
--- a/railties/lib/rails/test_unit/minitest_plugin.rb
+++ b/railties/lib/rails/test_unit/minitest_plugin.rb
@@ -29,12 +29,21 @@ module Minitest
     options[:patterns] = opts.order!
   end
 
+  # Running several Rake tasks in a single command would trip up the runner,
+  # as the patterns would also contain the other Rake tasks.
+  def self.rake_run(patterns) # :nodoc:
+    @rake_patterns = patterns
+    run
+  end
+
   def self.plugin_rails_init(options)
     self.run_with_rails_extension = true
 
     ENV["RAILS_ENV"] = options[:environment] || "test"
 
-    ::Rails::TestRequirer.require_files options[:patterns] unless run_with_autorun
+    unless run_with_autorun
+      ::Rails::TestRequirer.require_files @rake_patterns || options[:patterns]
+    end
 
     unless options[:full_backtrace] || ENV["BACKTRACE"]
       # Plugin can run without Rails loaded, check before filtering.
diff --git a/railties/lib/rails/test_unit/test_requirer.rb b/railties/lib/rails/test_unit/test_requirer.rb
index 84c2256729..83d2c55ffd 100644
--- a/railties/lib/rails/test_unit/test_requirer.rb
+++ b/railties/lib/rails/test_unit/test_requirer.rb
@@ -18,7 +18,7 @@ module Rails
             arg = arg.gsub(/:(\d+)?$/, '')
             if Dir.exist?(arg)
               "#{arg}/**/*_test.rb"
-            elsif File.file?(arg)
+            else
               arg
             end
           end
diff --git a/railties/lib/rails/test_unit/testing.rake b/railties/lib/rails/test_unit/testing.rake
index dda492f974..6676c6a079 100644
--- a/railties/lib/rails/test_unit/testing.rake
+++ b/railties/lib/rails/test_unit/testing.rake
@@ -7,7 +7,7 @@ task default: :test
 desc "Runs all tests in test folder"
 task :test do
   $: << "test"
-  Minitest.run(['test'])
+  Minitest.rake_run(["test"])
 end
 
 namespace :test do
@@ -24,22 +24,22 @@ namespace :test do
   ["models", "helpers", "controllers", "mailers", "integration", "jobs"].each do |name|
     task name => "test:prepare" do
       $: << "test"
-      Minitest.run(["test/#{name}"])
+      Minitest.rake_run(["test/#{name}"])
     end
   end
 
   task :generators => "test:prepare" do
     $: << "test"
-    Minitest.run(["test/lib/generators"])
+    Minitest.rake_run(["test/lib/generators"])
   end
 
   task :units => "test:prepare" do
     $: << "test"
-    Minitest.run(["test/models", "test/helpers", "test/unit"])
+    Minitest.rake_run(["test/models", "test/helpers", "test/unit"])
   end
 
   task :functionals => "test:prepare" do
     $: << "test"
-    Minitest.run(["test/controllers", "test/mailers", "test/functional"])
+    Minitest.rake_run(["test/controllers", "test/mailers", "test/functional"])
   end
 end
diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 494e6dd7bd..2d47a31826 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -340,6 +340,11 @@ module ApplicationTests
       assert_match '0 runs, 0 assertions', run_test_command('')
     end
 
+    def test_raise_error_when_specified_file_does_not_exist
+      error = capture(:stderr) { run_test_command('test/not_exists.rb') }
+      assert_match(%r{cannot load such file.+test/not_exists\.rb}, error)
+    end
+
     private
       def run_test_command(arguments = 'test/unit/test_test.rb')
         Dir.chdir(app_path) { `bin/rails t #{arguments}` }