diff --git a/codex/utils/asyncstatemachine.nim b/codex/utils/asyncstatemachine.nim
index 3f15af31..2d02110d 100644
--- a/codex/utils/asyncstatemachine.nim
+++ b/codex/utils/asyncstatemachine.nim
@@ -90,13 +90,13 @@ proc start*(machine: Machine, initialState: State) =
     machine.scheduled = newAsyncQueue[Event]()
 
   machine.started = true
-  try:
-    discard machine.scheduler().track(machine)
-    machine.schedule(Event.transition(machine.state, initialState))
-  except CancelledError as e:
-    discard
-  except CatchableError as e:
-    error("Error in scheduler", error = e.msg)
+  machine.scheduler()
+    .track(machine)
+    .cancelled(proc() = trace("machine.scheduler cancelled, swallowing"))
+    .catch((err: ref CatchableError) =>
+      error("Error in scheduler", error = err.msg)
+    )
+  machine.schedule(Event.transition(machine.state, initialState))
 
 proc stop*(machine: Machine) {.async.} =
   if not machine.started:
diff --git a/tests/codex/utils/testasyncstatemachine.nim b/tests/codex/utils/testasyncstatemachine.nim
index f65bb7ea..a114f7c9 100644
--- a/tests/codex/utils/testasyncstatemachine.nim
+++ b/tests/codex/utils/testasyncstatemachine.nim
@@ -25,7 +25,6 @@ method run(state: State1, machine: Machine): Future[?State] {.async.} =
 
 method run(state: State2, machine: Machine): Future[?State] {.async.} =
   inc runs[1]
-  echo "State2 run, runs: ", $runs
   try:
     await sleepAsync(1.hours)
   except CancelledError:
@@ -37,7 +36,6 @@ method run(state: State3, machine: Machine): Future[?State] {.async.} =
 
 method run(state: State4, machine: Machine): Future[?State] {.async.} =
   inc runs[3]
-  echo "State4 run, runs: ", $runs
   raise newException(ValueError, "failed")
 
 method onMoveToNextStateEvent*(state: State): ?State {.base, upraises:[].} =
@@ -60,7 +58,6 @@ method onError(state: State3, error: ref CatchableError): ?State =
 
 method onError(state: State4, error: ref CatchableError): ?State =
   inc errors[3]
-  echo "State4 onError, errors: ", $errors
   some State(State2.new())
 
 asyncchecksuite "async state machines":
diff --git a/tests/integration/marketplacesuite.nim b/tests/integration/marketplacesuite.nim
index 01bfd712..d3b1ef57 100644
--- a/tests/integration/marketplacesuite.nim
+++ b/tests/integration/marketplacesuite.nim
@@ -1,5 +1,5 @@
 import pkg/chronos
-import pkg/ethers
+import pkg/ethers/erc20
 from pkg/libp2p import Cid
 import pkg/codex/contracts/marketplace as mp
 import pkg/codex/periods