diff --git a/data/testable-phet-io-validated b/data/testable-phet-io-validated
index 66e6237a..16d3c8a8 100644
--- a/data/testable-phet-io-validated
+++ b/data/testable-phet-io-validated
@@ -22,3 +22,4 @@ molarity
 molecules-and-light
 ohms-law
 resistance-in-a-wire
+wave-on-a-string