diff --git a/bin/install-macos-nix-grpc.sh b/bin/install-macos-nix-grpc.sh
index 2a6fa79..fea7433 100755
--- a/bin/install-macos-nix-grpc.sh
+++ b/bin/install-macos-nix-grpc.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 function purge_grpc {
diff --git a/nix/grpc.nix b/nix/grpc.nix
index 8e68f0f..1581c5e 100644
--- a/nix/grpc.nix
+++ b/nix/grpc.nix
@@ -3,12 +3,12 @@
 
 stdenv.mkDerivation rec {
   name    = "grpc-${version}";
-  version = "0.15-${lib.strings.substring 0 7 rev}";
-  rev     = "03efbd34ce64615f58007eae667b375accc6c8e6";
+  version = "1.0.1-${lib.strings.substring 0 7 rev}";
+  rev     = "6040b471bcd1d6bb05b25c126b6545180a1d3528";
   src = fetchgit {
     inherit rev;
     url    = "https://github.com/grpc/grpc.git";
-    sha256 = "0a48swsip09bd0yk80gl9r7pny9dal3byyd22bdz4fcvydna43m0";
+    sha256 = "1kx6jkx2dnnfnjfyc50ravfk7mfdszj988vndrlzs1zkd6627k4z";
   };
   preInstall  = "export prefix";
   buildInputs =
diff --git a/tests/LowLevelTests.hs b/tests/LowLevelTests.hs
index 75c24b5..1476fe7 100644
--- a/tests/LowLevelTests.hs
+++ b/tests/LowLevelTests.hs
@@ -244,9 +244,7 @@ testAuthMetadataTransfer =
       let authCtx = (channelAuthContext authMetaCtx)
 
       addAuthProperty authCtx (AuthProperty "foo1" "bar1")
-      print "getting properties"
       newProps <- getAuthProperties authCtx
-      print "got properties"
       let addedProp = find ((== "foo1") . authPropName) newProps
       addedProp @?= Just (AuthProperty "foo1" "bar1")
       return $ ClientMetadataCreateResult [("foo","bar")] StatusOk ""
@@ -620,13 +618,13 @@ testGoaway =
       rm <- clientRegisterMethodNormal c "/foo"
       clientRequest c rm 10 "" mempty
       clientRequest c rm 10 "" mempty
-      lastResult  <- clientRequest c rm 1 "" mempty
-      assertBool "Client handles server shutdown gracefully" $
-        lastResult == badStatus StatusUnavailable
-        ||
-        lastResult == badStatus StatusDeadlineExceeded
-        ||
-        lastResult == Left GRPCIOTimeout
+      eer <- clientRequest c rm 1 "" mempty
+      assertBool "Client handles server shutdown gracefully" $ case eer of
+        Left (GRPCIOBadStatusCode StatusUnavailable _)                        -> True
+        Left (GRPCIOBadStatusCode StatusDeadlineExceeded "Deadline Exceeded") -> True
+        Left GRPCIOTimeout                                                    -> True
+        _                                                                     -> False
+
     server s = do
       let rm = head (normalMethods s)
       serverHandleNormalCall s rm mempty dummyHandler
@@ -640,7 +638,7 @@ testSlowServer =
     client c = do
       rm <- clientRegisterMethodNormal c "/foo"
       result <- clientRequest c rm 1 "" mempty
-      result @?= badStatus StatusDeadlineExceeded
+      result @?= Left (GRPCIOBadStatusCode StatusDeadlineExceeded "Deadline Exceeded")
     server s = do
       let rm = head (normalMethods s)
       serverHandleNormalCall s rm mempty $ \_ -> do
@@ -789,12 +787,6 @@ dummyResult' :: StatusDetails
              -> IO (ByteString, MetadataMap, StatusCode, StatusDetails)
 dummyResult' = return . (mempty, mempty, StatusOk, )
 
-badStatus :: StatusCode -> Either GRPCIOError a
-badStatus st = Left . GRPCIOBadStatusCode st $ case st of
-  StatusDeadlineExceeded -> "Deadline Exceeded"
-  StatusCancelled        -> "Received RST_STREAM err=8"
-  _ -> mempty
-
 nop :: Monad m => a -> m ()
 nop = const (return ())