diff --git a/itests/wdpost_worker_config_test.go b/itests/wdpost_worker_config_test.go
index d1672c20f..ca22d82e4 100644
--- a/itests/wdpost_worker_config_test.go
+++ b/itests/wdpost_worker_config_test.go
@@ -139,7 +139,7 @@ func TestWindowPostNoBuiltinWindowWithWorker(t *testing.T) {
 
 	t.Log("post message landed")
 
-	bm.MineBlocks(ctx, 2*time.Millisecond)
+	bm.MineBlocksMustPost(ctx, 2*time.Millisecond)
 
 	waitUntil = di.Open + di.WPoStChallengeWindow*3
 	t.Logf("End for head.Height > %d", waitUntil)
diff --git a/itests/worker_test.go b/itests/worker_test.go
index c4f885fb0..d3273dd6c 100644
--- a/itests/worker_test.go
+++ b/itests/worker_test.go
@@ -551,7 +551,7 @@ func TestWindowPostV1P1NV20WorkerFault(t *testing.T) {
 			}
 		}))
 
-	bm := ens.InterconnectAll().BeginMining(blocktime)[0]
+	bm := ens.InterconnectAll().BeginMiningMustPost(blocktime)[0]
 
 	maddr, err := miner.ActorAddress(ctx)
 	require.NoError(t, err)