diff --git a/js/accessibility/pdom/PDOMSiblingTests.js b/js/accessibility/pdom/PDOMSiblingTests.js
index 3ee818f2d..76321473e 100644
--- a/js/accessibility/pdom/PDOMSiblingTests.js
+++ b/js/accessibility/pdom/PDOMSiblingTests.js
@@ -1,4 +1,4 @@
-// Copyright 2019-2022, University of Colorado Boulder
+// Copyright 2019-2023, University of Colorado Boulder
 
 /**
  * Tests for styling accessibility siblings. Siblings should be positioned on top of other elements in the PDOM.
diff --git a/js/accessibility/pdom/PDOMUtilsTests.js b/js/accessibility/pdom/PDOMUtilsTests.js
index dcacb0ce3..22ba91056 100644
--- a/js/accessibility/pdom/PDOMUtilsTests.js
+++ b/js/accessibility/pdom/PDOMUtilsTests.js
@@ -1,4 +1,4 @@
-// Copyright 2018-2021, University of Colorado Boulder
+// Copyright 2018-2023, University of Colorado Boulder
 
 /**
  * ParallelDOM tests