diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Revision history for lsp-test
 
+## 0.14.1.0
+
+* Compatibility with new `lsp-types` major version.
+* Export `runSessionWithConfigCustomProcess` to allow modifying the CreateProcess used to start a server
+* Add `MonadThrow` instance for `Session`
+
 ## 0.14.0.3
 
 * Compatibility with new `lsp-types` major version.
diff --git a/lsp-test.cabal b/lsp-test.cabal
--- a/lsp-test.cabal
+++ b/lsp-test.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                lsp-test
-version:             0.14.0.3
+version:             0.14.1.0
 synopsis:            Functional test framework for LSP servers.
 description:
   A test framework for writing tests against
@@ -36,8 +36,8 @@
                      , parser-combinators:Control.Applicative.Combinators
   default-language:    Haskell2010
   build-depends:       base >= 4.10 && < 5
-                     , lsp-types == 1.5.*
-                     , lsp == 1.5.*
+                     , lsp-types == 1.5.* || == 1.6.*
+                     , lsp == 1.5.* || == 1.6.*
                      , aeson
                      , time
                      , aeson-pretty
@@ -51,6 +51,7 @@
                      , data-default
                      , Diff >= 0.3
                      , directory
+                     , exceptions
                      , filepath
                      , Glob >= 0.9 && < 0.11
                      , lens
@@ -83,7 +84,7 @@
   build-depends:       base >= 4.10 && < 5
                      , hspec
                      , lens
-                     , lsp == 1.5.*
+                     , lsp == 1.6.*
                      , lsp-test
                      , data-default
                      , aeson
@@ -101,7 +102,7 @@
   main-is:             FuncTest.hs
   hs-source-dirs:      func-test
   type:                exitcode-stdio-1.0
-  build-depends:       base 
+  build-depends:       base
                      , lsp-test
                      , lsp
                      , process
diff --git a/src/Language/LSP/Test.hs b/src/Language/LSP/Test.hs
--- a/src/Language/LSP/Test.hs
+++ b/src/Language/LSP/Test.hs
@@ -25,7 +25,9 @@
     Session
   , runSession
   , runSessionWithConfig
+  , runSessionWithConfigCustomProcess
   , runSessionWithHandles
+  , runSessionWithHandles'
   -- ** Config
   , SessionConfig(..)
   , defaultConfig
@@ -132,7 +134,7 @@
 import System.IO
 import System.Directory
 import System.FilePath
-import System.Process (ProcessHandle)
+import System.Process (ProcessHandle, CreateProcess)
 import qualified System.FilePath.Glob as Glob
 import Control.Monad.State (execState)
 
@@ -158,9 +160,19 @@
                      -> FilePath -- ^ The filepath to the root directory for the session.
                      -> Session a -- ^ The session to run.
                      -> IO a
-runSessionWithConfig config' serverExe caps rootDir session = do
+runSessionWithConfig = runSessionWithConfigCustomProcess id
+
+-- | Starts a new session with a custom configuration and server 'CreateProcess'.
+runSessionWithConfigCustomProcess :: (CreateProcess -> CreateProcess) -- ^ Tweak the 'CreateProcess' used to start the server.
+                                  -> SessionConfig -- ^ Configuration options for the session.
+                                  -> String -- ^ The command to run the server.
+                                  -> C.ClientCapabilities -- ^ The capabilities that the client should declare.
+                                  -> FilePath -- ^ The filepath to the root directory for the session.
+                                  -> Session a -- ^ The session to run.
+                                  -> IO a
+runSessionWithConfigCustomProcess modifyCreateProcess config' serverExe caps rootDir session = do
   config <- envOverrideConfig config'
-  withServer serverExe (logStdErr config) $ \serverIn serverOut serverProc ->
+  withServer serverExe (logStdErr config) modifyCreateProcess $ \serverIn serverOut serverProc ->
     runSessionWithHandles' (Just serverProc) serverIn serverOut config caps rootDir session
 
 -- | Starts a new session, using the specified handles to communicate with the
@@ -769,7 +781,7 @@
 getSemanticTokens doc = do
   let params = SemanticTokensParams Nothing Nothing doc
   rsp <- request STextDocumentSemanticTokensFull params
-  pure $ getResponseResult rsp 
+  pure $ getResponseResult rsp
 
 -- | Returns a list of capabilities that the server has requested to /dynamically/
 -- register during the 'Session'.
diff --git a/src/Language/LSP/Test/Server.hs b/src/Language/LSP/Test/Server.hs
--- a/src/Language/LSP/Test/Server.hs
+++ b/src/Language/LSP/Test/Server.hs
@@ -6,13 +6,13 @@
 import System.IO
 import System.Process hiding (withCreateProcess)
 
-withServer :: String -> Bool -> (Handle -> Handle -> ProcessHandle -> IO a) -> IO a
-withServer serverExe logStdErr f = do
+withServer :: String -> Bool -> (CreateProcess -> CreateProcess) -> (Handle -> Handle -> ProcessHandle -> IO a) -> IO a
+withServer serverExe logStdErr modifyCreateProcess f = do
   -- TODO Probably should just change runServer to accept
   -- separate command and arguments
   let cmd:args = words serverExe
       createProc = (proc cmd args) { std_in = CreatePipe, std_out = CreatePipe, std_err = CreatePipe }
-  withCreateProcess createProc $ \(Just serverIn) (Just serverOut) (Just serverErr) serverProc -> do
+  withCreateProcess (modifyCreateProcess createProc) $ \(Just serverIn) (Just serverOut) (Just serverErr) serverProc -> do
     -- Need to continuously consume to stderr else it gets blocked
     -- Can't pass NoStream either to std_err
     hSetBuffering serverErr NoBuffering
diff --git a/src/Language/LSP/Test/Session.hs b/src/Language/LSP/Test/Session.hs
--- a/src/Language/LSP/Test/Session.hs
+++ b/src/Language/LSP/Test/Session.hs
@@ -40,8 +40,9 @@
 import Control.Exception
 import Control.Lens hiding (List, Empty)
 import Control.Monad
-import Control.Monad.IO.Class
+import Control.Monad.Catch (MonadThrow)
 import Control.Monad.Except
+import Control.Monad.IO.Class
 #if __GLASGOW_HASKELL__ == 806
 import Control.Monad.Fail
 #endif
@@ -92,7 +93,7 @@
 -- 'Language.LSP.Test.sendNotification'.
 
 newtype Session a = Session (ConduitParser FromServerMessage (StateT SessionState (ReaderT SessionContext IO)) a)
-  deriving (Functor, Applicative, Monad, MonadIO, Alternative)
+  deriving (Functor, Applicative, Monad, MonadIO, Alternative, MonadThrow)
 
 #if __GLASGOW_HASKELL__ >= 806
 instance MonadFail Session where