diff --git a/gen.go b/gen.go
index 2cad06d..757fefb 100644
--- a/gen.go
+++ b/gen.go
@@ -121,6 +121,7 @@
 		_          = generate("./encoding/htmlindex", unicode, language, mib)
 		_          = generate("./encoding/ianaindex", unicode, language, mib)
 		_          = generate("./secure/precis", unicode, norm, rangetable, cases, width, bidi)
+		_          = generate("./internal/cldrtree", language)
 		_          = generate("./currency", unicode, cldr, language, internal, number)
 		_          = generate("./feature/plural", unicode, cldr, language, internal, number)
 		_          = generate("./internal/export/idna", unicode, bidi, norm)
diff --git a/internal/cldrtree/cldrtree.go b/internal/cldrtree/cldrtree.go
index 660a5b2..7530831 100644
--- a/internal/cldrtree/cldrtree.go
+++ b/internal/cldrtree/cldrtree.go
@@ -7,6 +7,8 @@
 //
 package cldrtree
 
+//go:generate go test -gen
+
 // cldrtree stores CLDR data in a tree-like structure called Tree. In the CLDR
 // data each branch in the tree is indicated by either an element name or an
 // attribute value. A Tree does not distinguish between these two cases, but