Mention LSP_TEST_LOG_STDERR in README

diff --git a/README.md b/README.md
index 2a3259dfba77d27df1083727c59d69915e7e8079..dbf803cdb2eff01de2c22747e0d62b5c0a3269e3 100644 (file)
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Whilst writing your tests you may want to debug them to see what's going wrong.
 You can set the `logMessages` and `logStdErr` options in `SessionConfig` to see what the server is up to.
 There are also corresponding environment variables so you can turn them on from the command line:
 ```
-LSP_TEST_LOG_MESSAGES=1 cabal test
+LSP_TEST_LOG_MESSAGES=1 LSP_TEST_LOG_STDERR=1 cabal test
 ```
 
 ## Developing