diff --git a/extensions/vscode-api-tests/package.json b/extensions/vscode-api-tests/package.json
index 51a74ad7b00557..868f7cfd4e756f 100644
--- a/extensions/vscode-api-tests/package.json
+++ b/extensions/vscode-api-tests/package.json
@@ -8,6 +8,7 @@
     "activeComment",
     "authSession",
     "defaultChatParticipant",
+    "chatParticipantPrivate",
     "chatVariableResolver",
     "contribViewsRemote",
     "contribStatusBarItems",