diff --git a/test/OuraFilters.hs b/test/OuraFilters.hs
index d8e0bd7..d92e227 100644
--- a/test/OuraFilters.hs
+++ b/test/OuraFilters.hs
@@ -76,15 +76,15 @@ ouraFiltersSpec = Utils.killProcessesOnError do
       let
         tx = Mock.txToBS exampleTx
         matchingTx = Mock.txToBS exampleMatchingTx
-      oura.send tx
-      -- _ <- oura.receive
-      oura.send matchingTx
-      Right outTxHash <-
-        extractOutputTxHash <$> oura.receive
-      Right inputTxHash <-
-        pure $ extractInputTxHash matchingTx
-      outTxHash `shouldBe` inputTxHash
-      oura.shutDown
+      Utils.withTimeout 3.0 do
+        oura.send tx
+        oura.send matchingTx
+        Right outTxHash <-
+          extractOutputTxHash <$> oura.receive
+        Right inputTxHash <-
+          pure $ extractInputTxHash matchingTx
+        outTxHash `shouldBe` inputTxHash
+        oura.shutDown
   OuraFilters.Auction.spec
 
 extractInputTxHash :: BS.ByteString -> Either String T.Text
diff --git a/test/OuraFilters/Auction.hs b/test/OuraFilters/Auction.hs
index 2a664ef..747d400 100644
--- a/test/OuraFilters/Auction.hs
+++ b/test/OuraFilters/Auction.hs
@@ -9,16 +9,17 @@ import Control.Arrow ((>>>))
 import Control.Lens ((%~), (.~), (^.))
 import Data.Aeson qualified as Aeson
 import Data.Function ((&))
-import Data.Functor ((<&>))
+import Data.Functor (void, (<&>))
 import Oura qualified
 import OuraFilters.Mock qualified as Mock
 import PlutusLedgerApi.V1 qualified
 import PlutusLedgerApi.V1.Value qualified as V1.Value
 import PlutusTx.AssocMap qualified as AssocMap
 import System.Process (ProcessHandle)
+import System.Timeout (timeout)
 import Test.Hspec (describe, focus, it, shouldBe)
 import Test.Hspec.Core.Spec (SpecM)
-import Utils (SpotGarbage)
+import Utils (SpotGarbage, withTimeout)
 import Prelude
 
 spec :: SpecM (SpotGarbage IO ProcessHandle) ()
@@ -47,13 +48,15 @@ spec =
                 Mock.hash .~ rightTxHash $
                   createTxMock params
           unmatchingTx = Mock.txToBS $ Mock.mkTxEvent Mock.arbitraryTx
-        oura.send unmatchingTx
-        oura.send tx
-        Right txEvent <-
-          Aeson.eitherDecodeStrict @Mock.TxEvent
-            <$> oura.receive
-        (txEvent ^. Mock.parsed_tx . Mock.hash) `shouldBe` rightTxHash
-        oura.shutDown
+        withTimeout 3.0 do
+          oura.send unmatchingTx
+          oura.send tx
+          -- 2 sec
+          Right txEvent <-
+            Aeson.eitherDecodeStrict @Mock.TxEvent
+              <$> oura.receive
+          (txEvent ^. Mock.parsed_tx . Mock.hash) `shouldBe` rightTxHash
+          oura.shutDown
     it "Recognizes 'Start' transition" \spotGarbage -> do
       fail @IO @() "Not implemented"
     it "Recognizes 'MakeBid' transition" \spotGarbage -> do
diff --git a/test/Utils.hs b/test/Utils.hs
index f3bd146..65d1fa8 100644
--- a/test/Utils.hs
+++ b/test/Utils.hs
@@ -45,15 +45,22 @@ import Cardano.Extras
 import Data.Spine (HasSpine (..))
 
 import Control.Exception (bracket)
+import Control.Monad ((<=<))
 import Data.Aeson.Types qualified as Aeson
 import Data.Foldable (traverse_)
 import Data.IORef qualified as IORef
 import System.Directory (removeFile)
 import System.IO (hClose, openTempFile)
 import System.Process qualified as Process
+import System.Timeout (timeout)
 import Test.Hspec qualified as Hspec
 import TestNFT
 
+withTimeout :: (Hspec.HasCallStack) => Float -> IO a -> IO a
+withTimeout sec =
+  maybe (error "Failed by timeout") pure
+    <=< timeout (round $ sec * 10 ** 6)
+
 resultToEither :: Aeson.Result a -> Either String a
 resultToEither (Aeson.Success a) = Right a
 resultToEither (Aeson.Error err) = Left err