diff --git a/grpc-haskell.cabal b/grpc-haskell.cabal
index 4cadf7c..0ec0e2f 100644
--- a/grpc-haskell.cabal
+++ b/grpc-haskell.cabal
@@ -76,7 +76,9 @@ test-suite test
     , tasty >= 0.11 && <0.12
     , tasty-hunit >= 0.9 && <0.10
     , containers ==0.5.*
-  other-modules: LowLevelTests
+  other-modules:
+    LowLevelTests,
+    UnsafeTests
   default-language:     Haskell2010
   ghc-options:          -Wall -fwarn-incomplete-patterns -g -threaded
   hs-source-dirs:       tests
diff --git a/tests/LowLevelTests.hs b/tests/LowLevelTests.hs
index 4a570ba..41bebec 100644
--- a/tests/LowLevelTests.hs
+++ b/tests/LowLevelTests.hs
@@ -11,17 +11,17 @@ import           Test.Tasty.HUnit ((@?=), testCase)
 
 lowLevelTests :: TestTree
 lowLevelTests = testGroup "Unit tests of low-level Haskell library"
-  [  testGRPCBracket
-   , testCompletionQueueCreateDestroy
-   , testServerCreateDestroy
-   , testClientCreateDestroy
-   , testWithServerCall
-   , testWithClientCall
-   --, testPayloadLowLevel --TODO: currently crashing from free on unalloced ptr
-   --, testClientRequestNoServer --TODO: succeeds when no other tests run.
-   , testServerAwaitNoClient
-   --, testPayloadLowLevelUnregistered --TODO: succeeds when no other tests run.
-   ]
+  [ testGRPCBracket
+  , testCompletionQueueCreateDestroy
+  , testServerCreateDestroy
+  , testClientCreateDestroy
+  , testWithServerCall
+  , testWithClientCall
+  -- , testPayloadLowLevel --TODO: currently crashing from free on unalloced ptr
+  -- , testClientRequestNoServer --TODO: succeeds when no other tests run.
+  , testServerAwaitNoClient
+  -- , testPayloadLowLevelUnregistered --TODO: succeeds when no other tests run.
+  ]
 
 dummyMeta :: M.Map ByteString ByteString
 dummyMeta = M.fromList [("foo","bar")]
diff --git a/tests/Properties.hs b/tests/Properties.hs
index 2a105e2..a6345f2 100644
--- a/tests/Properties.hs
+++ b/tests/Properties.hs
@@ -1,7 +1,6 @@
 {-# LANGUAGE OverloadedStrings #-}
 
 import           Control.Concurrent.Async
-import qualified Data.ByteString                as B
 import           Foreign.Marshal.Alloc
 import           Foreign.Ptr
 import           Foreign.Storable
@@ -10,67 +9,12 @@ import           Network.GRPC.Unsafe.ByteBuffer
 import           Network.GRPC.Unsafe.Constants
 import           Network.GRPC.Unsafe.Metadata
 import           Network.GRPC.Unsafe.Op
-import           Network.GRPC.Unsafe.Slice
 import           Network.GRPC.Unsafe.Time
 import           Test.Tasty
 import           Test.Tasty.HUnit               as HU
 
 import           LowLevelTests
-
-roundtripSlice :: B.ByteString -> TestTree
-roundtripSlice bs = testCase "Slice C bindings roundtrip" $ do
-  slice <- byteStringToSlice bs
-  unslice <- sliceToByteString slice
-  bs HU.@?= unslice
-  freeSlice slice
-
-roundtripByteBuffer :: B.ByteString -> TestTree
-roundtripByteBuffer bs = testCase "ByteBuffer C bindings roundtrip" $ do
-  slice <- byteStringToSlice bs
-  buffer <- grpcRawByteBufferCreate slice 1
-  reader <- byteBufferReaderCreate buffer
-  readSlice <- grpcByteBufferReaderReadall reader
-  bs' <- sliceToByteString readSlice
-  bs' HU.@?= bs
-  --clean up
-  freeSlice slice
-  byteBufferReaderDestroy reader
-  grpcByteBufferDestroy buffer
-  freeSlice readSlice
-
-currTimeMillis :: ClockType -> IO Int
-currTimeMillis t = do
-  gprT <- gprNow t
-  tMillis <- gprTimeToMillis gprT
-  timespecDestroy gprT
-  return tMillis
-
-testNow :: TestTree
-testNow = testCase "create and destroy various clock types" $ do
-  _ <- currTimeMillis GprClockMonotonic
-  _ <- currTimeMillis GprClockRealtime
-  _ <- currTimeMillis GprClockPrecise
-  return ()
-
-testMetadata :: TestTree
-testMetadata = testCase "metadata setter/getter C bindings roundtrip" $ do
-  m <- metadataAlloc 3
-  setMetadataKeyVal "hello" "world" m 0
-  setMetadataKeyVal "foo" "bar" m 1
-  setMetadataKeyVal "Haskell" "Curry" m 2
-  k0 <- getMetadataKey m 0
-  v0 <- getMetadataVal m 0
-  k1 <- getMetadataKey m 1
-  v1 <- getMetadataVal m 1
-  k2 <- getMetadataKey m 2
-  v2 <- getMetadataVal m 2
-  k0 HU.@?= "hello"
-  v0 HU.@?= "world"
-  k1 HU.@?= "foo"
-  v1 HU.@?= "bar"
-  k2 HU.@?= "Haskell"
-  v2 HU.@?= "Curry"
-  metadataFree m
+import           UnsafeTests
 
 assertCqEventComplete :: Event -> IO ()
 assertCqEventComplete e = do
@@ -200,45 +144,17 @@ testPayload = testCase "low-level C bindings request/response " $ do
   grpcInit
   withAsync testPayloadServer $ \a1 -> do
     withAsync testPayloadClient $ \a2 -> do
-      () <- wait a1
+      wait a1
       wait a2
   grpcShutdown
   putStrLn "Done."
 
-testCreateDestroyMetadata :: TestTree
-testCreateDestroyMetadata = testCase "create/destroy metadataArrayPtr " $ do
-  grpcInit
-  withMetadataArrayPtr $ const (return ())
-  grpcShutdown
-
-testCreateDestroyMetadataKeyVals :: TestTree
-testCreateDestroyMetadataKeyVals = testCase "create/destroy metadata k/vs " $ do
-  grpcInit
-  withMetadataKeyValPtr 10 $ const (return ())
-  grpcShutdown
-
-testCreateDestroyDeadline :: TestTree
-testCreateDestroyDeadline = testCase "create/destroy deadline " $ do
-  grpcInit
-  withDeadlineSeconds 10 $ const (return ())
-  grpcShutdown
-
-unsafeTests :: TestTree
-unsafeTests = testGroup "Unit tests for unsafe C bindings."
-  [testPayload,
-   roundtripSlice "Hello, world!",
-   roundtripByteBuffer "Hwaet! We gardena in geardagum...",
-   testMetadata,
-   testNow,
-   testCreateDestroyMetadata,
-   testCreateDestroyMetadataKeyVals,
-   testCreateDestroyDeadline
-   ]
-
 allTests :: TestTree
 allTests = testGroup "All tests"
-  [ unsafeTests,
-   lowLevelTests]
+  [ testPayload
+  , unsafeTests
+  , lowLevelTests
+  ]
 
 main :: IO ()
 main = defaultMain allTests
diff --git a/tests/UnsafeTests.hs b/tests/UnsafeTests.hs
new file mode 100644
index 0000000..9a87819
--- /dev/null
+++ b/tests/UnsafeTests.hs
@@ -0,0 +1,96 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module UnsafeTests where
+
+import           Data.ByteString                as B (ByteString)
+import           Network.GRPC.Unsafe
+import           Network.GRPC.Unsafe.ByteBuffer
+import           Network.GRPC.Unsafe.Metadata
+import           Network.GRPC.Unsafe.Slice
+import           Network.GRPC.Unsafe.Time
+import           Test.Tasty
+import           Test.Tasty.HUnit               as HU (testCase, (@?=))
+
+unsafeTests :: TestTree
+unsafeTests = testGroup "Unit tests for unsafe C bindings."
+  [ roundtripSlice "Hello, world!"
+  , roundtripByteBuffer "Hwaet! We gardena in geardagum..."
+  , testMetadata
+  , testNow
+  , testCreateDestroyMetadata
+  , testCreateDestroyMetadataKeyVals
+  , testCreateDestroyDeadline
+  ]
+
+roundtripSlice :: B.ByteString -> TestTree
+roundtripSlice bs = testCase "Slice C bindings roundtrip" $ do
+  slice <- byteStringToSlice bs
+  unslice <- sliceToByteString slice
+  bs HU.@?= unslice
+  freeSlice slice
+
+roundtripByteBuffer :: B.ByteString -> TestTree
+roundtripByteBuffer bs = testCase "ByteBuffer C bindings roundtrip" $ do
+  slice <- byteStringToSlice bs
+  buffer <- grpcRawByteBufferCreate slice 1
+  reader <- byteBufferReaderCreate buffer
+  readSlice <- grpcByteBufferReaderReadall reader
+  bs' <- sliceToByteString readSlice
+  bs' HU.@?= bs
+  -- clean up
+  freeSlice slice
+  byteBufferReaderDestroy reader
+  grpcByteBufferDestroy buffer
+  freeSlice readSlice
+
+testMetadata :: TestTree
+testMetadata = testCase "metadata setter/getter C bindings roundtrip" $ do
+  m <- metadataAlloc 3
+  setMetadataKeyVal "hello" "world" m 0
+  setMetadataKeyVal "foo" "bar" m 1
+  setMetadataKeyVal "Haskell" "Curry" m 2
+  k0 <- getMetadataKey m 0
+  v0 <- getMetadataVal m 0
+  k1 <- getMetadataKey m 1
+  v1 <- getMetadataVal m 1
+  k2 <- getMetadataKey m 2
+  v2 <- getMetadataVal m 2
+  k0 HU.@?= "hello"
+  v0 HU.@?= "world"
+  k1 HU.@?= "foo"
+  v1 HU.@?= "bar"
+  k2 HU.@?= "Haskell"
+  v2 HU.@?= "Curry"
+  metadataFree m
+
+currTimeMillis :: ClockType -> IO Int
+currTimeMillis t = do
+  gprT <- gprNow t
+  tMillis <- gprTimeToMillis gprT
+  timespecDestroy gprT
+  return tMillis
+
+testNow :: TestTree
+testNow = testCase "create and destroy various clock types" $ do
+  _ <- currTimeMillis GprClockMonotonic
+  _ <- currTimeMillis GprClockRealtime
+  _ <- currTimeMillis GprClockPrecise
+  return ()
+
+testCreateDestroyMetadata :: TestTree
+testCreateDestroyMetadata = testCase "create/destroy metadataArrayPtr " $ do
+  grpcInit
+  withMetadataArrayPtr $ const $ return ()
+  grpcShutdown
+
+testCreateDestroyMetadataKeyVals :: TestTree
+testCreateDestroyMetadataKeyVals = testCase "create/destroy metadata k/vs " $ do
+  grpcInit
+  withMetadataKeyValPtr 10 $ const $ return ()
+  grpcShutdown
+
+testCreateDestroyDeadline :: TestTree
+testCreateDestroyDeadline = testCase "create/destroy deadline " $ do
+  grpcInit
+  withDeadlineSeconds 10 $ const $ return ()
+  grpcShutdown