diff --git a/ruby/lib/minitest/queue/junit_reporter.rb b/ruby/lib/minitest/queue/junit_reporter.rb
index 0559b9c4..e8278d17 100644
--- a/ruby/lib/minitest/queue/junit_reporter.rb
+++ b/ruby/lib/minitest/queue/junit_reporter.rb
@@ -71,6 +71,7 @@ def add_tests_to(testsuites, suite, tests)
             'classname' => suite,
             'assertions' => test.assertions,
             'time' => test.time,
+            'timestamp' => test.start_timestamp,
             'flaky_test' => test.flaked?,
             'run-command' => Minitest.run_command_for_runnable(test),
           }
diff --git a/ruby/test/integration/minitest_redis_test.rb b/ruby/test/integration/minitest_redis_test.rb
index 05e426ef..0d9c872c 100644
--- a/ruby/test/integration/minitest_redis_test.rb
+++ b/ruby/test/integration/minitest_redis_test.rb
@@ -673,13 +673,13 @@ def test_junit_reporter
         <?xml version="1.1" encoding="UTF-8"?>
         <testsuites>
           <testsuite name="ATest" filepath="test/dummy_test.rb" skipped="5" failures="1" errors="0" tests="6" assertions="5" time="X.XX">
-            <testcase name="test_foo" classname="ATest" assertions="0" time="X.XX" flaky_test="false" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_foo\" lineno="5">
+            <testcase name="test_foo" classname="ATest" assertions="0" time="X.XX" timestamp="X.XX" flaky_test="false" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_foo\" lineno="5">
               <skipped type="Minitest::Skip"/>
             </testcase>
-            <testcase name="test_bar" classname="ATest" assertions="1" time="X.XX" flaky_test="false" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_bar\" lineno="5">
+            <testcase name="test_bar" classname="ATest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="false" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_bar\" lineno="5">
               <skipped type="Minitest::Assertion"/>
             </testcase>
-            <testcase name="test_flaky" classname="ATest" assertions="1" time="X.XX" flaky_test="true" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky\" lineno="5">
+            <testcase name="test_flaky" classname="ATest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="true" run-command=\"bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky\" lineno="5">
               <failure type="Minitest::Assertion" message="Expected false to be truthy.">
                 <![CDATA[
         Skipped:
@@ -688,8 +688,8 @@ def test_junit_reporter
         ]]>
               </failure>
             </testcase>
-            <testcase name="test_flaky_passes" classname="ATest" assertions="1" time="X.XX" flaky_test="true" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky_passes" lineno="5"/>
-            <testcase name="test_flaky_fails_retry" classname="ATest" assertions="1" time="X.XX" flaky_test="true" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky_fails_retry" lineno="5">
+            <testcase name="test_flaky_passes" classname="ATest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="true" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky_passes" lineno="5"/>
+            <testcase name="test_flaky_fails_retry" classname="ATest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="true" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_flaky_fails_retry" lineno="5">
               <failure type="Minitest::Assertion" message="Expected false to be truthy.">
                 <![CDATA[
         Skipped:
@@ -698,7 +698,7 @@ def test_junit_reporter
         ]]>
               </failure>
             </testcase>
-            <testcase name="test_bar" classname="ATest" assertions="1" time="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_bar" lineno="5">
+            <testcase name="test_bar" classname="ATest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n ATest\\#test_bar" lineno="5">
               <failure type="Minitest::Assertion" message="Expected false to be truthy.">
                 <![CDATA[
         Failure:
@@ -709,11 +709,11 @@ def test_junit_reporter
             </testcase>
           </testsuite>
           <testsuite name="BTest" filepath="test/dummy_test.rb" skipped="1" failures="0" errors="1" tests="3" assertions="1" time="X.XX">
-            <testcase name="test_bar" classname="BTest" assertions="0" time="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_bar" lineno="36">
+            <testcase name="test_bar" classname="BTest" assertions="0" time="X.XX" timestamp="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_bar" lineno="36">
               <skipped type="TypeError"/>
             </testcase>
-            <testcase name="test_foo" classname="BTest" assertions="1" time="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_foo" lineno="36"/>
-            <testcase name="test_bar" classname="BTest" assertions="0" time="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_bar" lineno="36">
+            <testcase name="test_foo" classname="BTest" assertions="1" time="X.XX" timestamp="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_foo" lineno="36"/>
+            <testcase name="test_bar" classname="BTest" assertions="0" time="X.XX" timestamp="X.XX" flaky_test="false" run-command="bundle exec ruby -Ilib:test test/dummy_test.rb -n BTest\\#test_bar" lineno="36">
               <error type="TypeError" message="TypeError: String can&apos;t be coerced into Integer">
                 <![CDATA[
         Failure:
diff --git a/ruby/test/support/output_test_helpers.rb b/ruby/test/support/output_test_helpers.rb
index 3c86a0b7..ca968371 100644
--- a/ruby/test/support/output_test_helpers.rb
+++ b/ruby/test/support/output_test_helpers.rb
@@ -29,7 +29,7 @@ def rewrite_paths(output)
   end
 
   def freeze_xml_timing(output)
-    output.gsub(/time="[\d\-\.e]+"/, 'time="X.XX"')
+    output.gsub(/time="[\d\-\.e]+"/, 'time="X.XX"').gsub(/timestamp="[\d\-\.e]+"/, 'timestamp="X.XX"')
   end
 
   def normalize(output)