Don't leak the global verbose flag into the test runner's ARGV

lib/rake/testtask.rb

@@ -110,9 +110,12 @@ def define
       task @name => Array(deps) do
         effective_verbose = @verbose || FileUtilsExt.verbose_flag == true
         FileUtilsExt.verbose(effective_verbose) do
+          # The global verbose flag (e.g. set by --trace or -n) controls
+          # whether rake echoes the command, but it must not inject "-v"
+          # into the test runner's ARGV. Only the task's own @verbose does.
           args =
             "#{ruby_opts_string} #{run_code} " +
-            "#{file_list_string} #{option_list(verbose: effective_verbose)}"
+            "#{file_list_string} #{option_list(verbose: @verbose)}"
           ruby args do |ok, status|
             if !ok && status.respond_to?(:signaled?) && status.signaled?
               raise SignalException.new(status.termsig)

test/test_rake_test_task.rb

@@ -242,11 +242,40 @@ def test_option_list_verbose_keyword_overrides
     assert_equal "-v", tt.option_list(verbose: true)
   end
 
+  def test_run_omits_v_for_global_verbose_only
+    # --trace and -n set the global verbose flag via Rake.verbose(true), but
+    # that must not leak "-v" into the test runner's ARGV. (issue #732)
+    Rake::FileUtilsExt.verbose_flag = true
+    tt = Rake::TestTask.new { |t| t.verbose = false }
+    refute_includes captured_test_command(tt).split, "-v"
+  ensure
+    Rake::FileUtilsExt.verbose_flag = false
+  end
+
+  def test_run_injects_v_for_task_verbose
+    tt = Rake::TestTask.new { |t| t.verbose = true }
+    assert_includes captured_test_command(tt).split, "-v"
+  end
+
   def test_task_order_only_prerequisites_key
     t = task "a" => "b", order_only: ["c"]
     b, c = task("b"), task("c")
     assert_equal ["b"], t.prerequisites
     assert_equal ["c"], t.order_only_prerequisites
     assert_equal [b, c], t.prerequisite_tasks
   end
+
+  private
+
+  # Run the test task's action with the +ruby+ invocation stubbed out and
+  # return the command string that would have been executed.
+  def captured_test_command(test_task)
+    command = nil
+    test_task.define_singleton_method(:ruby) do |*args, **_opts, &_block|
+      command = args.first
+      nil
+    end
+    Rake::Task[test_task.name].execute
+    command
+  end
 end