diff --git a/lsp-test.cabal b/lsp-test.cabal
--- a/lsp-test.cabal
+++ b/lsp-test.cabal
@@ -1,5 +1,5 @@
 name:                lsp-test
-version:             0.11.0.5
+version:             0.11.0.6
 synopsis:            Functional test framework for LSP servers.
 description:
   A test framework for writing tests against
diff --git a/src/Language/Haskell/LSP/Test/Session.hs b/src/Language/Haskell/LSP/Test/Session.hs
--- a/src/Language/Haskell/LSP/Test/Session.hs
+++ b/src/Language/Haskell/LSP/Test/Session.hs
@@ -71,7 +71,10 @@
 import System.Console.ANSI
 import System.Directory
 import System.IO
-import System.Process (waitForProcess, ProcessHandle())
+import System.Process (ProcessHandle())
+#ifndef mingw32_HOST_OS
+import System.Process (waitForProcess)
+#endif
 import System.Timeout
 
 -- | A session representing one instance of launching and connecting to a server.
@@ -271,7 +274,10 @@
           -- handles etc via cleanupProcess
           killThread tid
           -- Give the server some time to exit cleanly
+          -- It makes the server hangs in windows so we have to avoid it
+#ifndef mingw32_HOST_OS
           timeout msgTimeoutMs (waitForProcess serverProc)
+#endif
           cleanupProcess server
 
   (result, _) <- bracket serverListenerLauncher