diff --git a/.changeset/shiny-rats-move.md b/.changeset/shiny-rats-move.md
new file mode 100644
index 00000000000..5421df11aa3
--- /dev/null
+++ b/.changeset/shiny-rats-move.md
@@ -0,0 +1,5 @@
+---
+"@firebase/webchannel-wrapper": patch
+---
+
+Remove an unused option (`backgroundChannelTest`).
diff --git a/packages/webchannel-wrapper/externs/overrides.js b/packages/webchannel-wrapper/externs/overrides.js
index 60f98a6382c..df4b8b32d8b 100644
--- a/packages/webchannel-wrapper/externs/overrides.js
+++ b/packages/webchannel-wrapper/externs/overrides.js
@@ -54,8 +54,6 @@ goog.net.WebChannel.Options.httpSessionIdParam;
 /** @type {string|undefined} */
 goog.net.WebChannel.Options.httpHeadersOverwriteParam;
 
-goog.net.WebChannel.Options.backgroundChannelTest;
-
 /** @type {boolean|undefined} */
 goog.net.WebChannel.Options.fastHandshake;