-To test make sure you have the following language servers installed:
-- [haskell-ide-engine](https://github.com/haskell/haskell-ide-engine)
-- [javascript-typescript-langserver](https://github.com/sourcegraph/javascript-typescript-langserver)
+The tests for lsp-test use a dummy server found in `test/dummy-server/`.
+Run the tests with `cabal test` or `stack test`.
+Tip: If you want to filter the tests, use `cabal run test:tests -- -m "foo"`
+
+## Troubleshooting
+Seeing funny stuff when running lsp-test via stack? If your server is built upon Haskell tooling, [keep in mind that stack sets some environment variables related to GHC, and you may want to unset them.](https://github.com/alanz/haskell-ide-engine/blob/bfb16324d396da71000ef81d51acbebbdaa854ab/test/utils/TestUtils.hs#L290-L298)