diff --git a/tools/buildbot/PackageScript b/tools/buildbot/PackageScript
index 2c5f3c41..a24529aa 100644
--- a/tools/buildbot/PackageScript
+++ b/tools/buildbot/PackageScript
@@ -337,6 +337,7 @@ CopyFiles('plugins/include', 'addons/sourcemod/scripting/include',
     'sorting.inc',
     'sourcemod.inc',
     'string.inc',
+    'testing.inc',
     'textparse.inc',
     'tf2.inc',
     'tf2_stocks.inc',