diff --git a/haskell-language-server.cabal b/haskell-language-server.cabal
index 9f719d06b4..0922ba8c59 100644
--- a/haskell-language-server.cabal
+++ b/haskell-language-server.cabal
@@ -22,10 +22,18 @@ extra-source-files:
   test/testdata/**/*.cabal
   test/testdata/**/*.yaml
   test/testdata/**/*.hs
+  test/testdata/**/*.json
 
+  -- some README's have a .gif showcasing the feature
+  plugins/**/*.md
+  plugins/**/*.gif
+
+  -- These globs should only match test/testdata
   plugins/**/*.project
+  plugins/**/*.expected
   plugins/**/*.cabal
   plugins/**/*.yaml
+  plugins/**/*.txt
   plugins/**/*.hs
 
   bindist/wrapper.in
diff --git a/plugins/hls-stan-plugin/test/testdata/.hie/Main.hie b/plugins/hls-stan-plugin/test/testdata/.hie/Main.hie
deleted file mode 100644
index 0c7367ab46..0000000000
Binary files a/plugins/hls-stan-plugin/test/testdata/.hie/Main.hie and /dev/null differ