diff --git a/plugins/hls-module-name-plugin/hls-module-name-plugin.cabal b/plugins/hls-module-name-plugin/hls-module-name-plugin.cabal
index 3fa203c4c6..5c503797bb 100644
--- a/plugins/hls-module-name-plugin/hls-module-name-plugin.cabal
+++ b/plugins/hls-module-name-plugin/hls-module-name-plugin.cabal
@@ -14,8 +14,8 @@ category:           Development
 build-type:         Simple
 extra-source-files:
   LICENSE
-  test/testdata/*.hs
-  test/testdata/*.yaml
+  test/testdata/**/*.yaml
+  test/testdata/**/*.hs
 
 library
   exposed-modules:  Ide.Plugin.ModuleName