diff --git a/ruby/test/minitest/queue/order_reporter_test.rb b/ruby/test/minitest/queue/order_reporter_test.rb
index 3ba2952d..ad29d58c 100644
--- a/ruby/test/minitest/queue/order_reporter_test.rb
+++ b/ruby/test/minitest/queue/order_reporter_test.rb
@@ -25,18 +25,16 @@ def test_before_test
 
     unless truffleruby?
       def test_forking
-        pid = fork do
-          @reporter.start
-        end
+        # `start` truncates the log. In production it runs in the parent before
+        # workers fork; wait for it here so the truncate can't race the appends.
+        Process.waitpid(fork { @reporter.start })
         pids = 5.times.map do
           fork do
             @reporter.before_test(runnable(Process.pid))
             @reporter.report
           end
         end
-        (pids + [pid]).map do |pid|
-          Process.waitpid(pid)
-        end
+        pids.each { |pid| Process.waitpid(pid) }
 
         assert_equal pids.map { |pid| "Minitest::Test##{pid}" }.sort, File.readlines(log_path).map(&:chomp).sort
       end
@@ -44,10 +42,6 @@ def test_forking
 
     private
 
-    def delete_log
-      File.delete(log_path) if File.exists?(log_path)
-    end
-
     def log_path
       @path ||= File.join(Dir.tmpdir, 'test_order.log')
     end