diff --git a/chain/gen/gen.go b/chain/gen/gen.go
index 206b6c8cf..01b874f92 100644
--- a/chain/gen/gen.go
+++ b/chain/gen/gen.go
@@ -361,6 +361,10 @@ func (cg *ChainGen) NextTipSet() (*MinedTipSet, error) {
 	return mts, nil
 }
 
+func (cg *ChainGen) SetWinningPoStProver(m address.Address, wpp WinningPoStProver) {
+	cg.eppProvs[m] = wpp
+}
+
 func (cg *ChainGen) NextTipSetFromMiners(base *types.TipSet, miners []address.Address) (*MinedTipSet, error) {
 	var blks []*types.FullBlock
 
diff --git a/chain/sync_test.go b/chain/sync_test.go
index efb601041..bf06f908b 100644
--- a/chain/sync_test.go
+++ b/chain/sync_test.go
@@ -433,6 +433,42 @@ func TestSyncBadTimestamp(t *testing.T) {
 	}
 }
 
+type badWpp struct{}
+
+func (wpp badWpp) GenerateCandidates(context.Context, abi.PoStRandomness, uint64) ([]uint64, error) {
+	return []uint64{1}, nil
+}
+
+func (wpp badWpp) ComputeProof(context.Context, []abi.SectorInfo, abi.PoStRandomness) ([]abi.PoStProof, error) {
+	return []abi.PoStProof{
+		abi.PoStProof{
+			PoStProof:  abi.RegisteredPoStProof_StackedDrgWinning2KiBV1,
+			ProofBytes: []byte("evil"),
+		},
+	}, nil
+}
+
+func TestSyncBadWinningPoSt(t *testing.T) {
+	H := 10
+	tu := prepSyncTest(t, H)
+
+	client := tu.addClientNode()
+
+	require.NoError(t, tu.mn.LinkAll())
+	tu.connect(client, 0)
+	tu.waitUntilSync(0, client)
+
+	base := tu.g.CurTipset
+
+	tu.g.SetWinningPoStProver(tu.g.Miners[0], &badWpp{})
+	tu.g.SetWinningPoStProver(tu.g.Miners[1], &badWpp{})
+	a1 := tu.mineOnBlock(base, 0, nil, false, true)
+
+	fmt.Println(a1)
+
+	t.Fatal("WIP: TODO")
+}
+
 func (tu *syncTestUtil) loadChainToNode(to int) {
 	// utility to simulate incoming blocks without miner process
 	// TODO: should call syncer directly, this won't work correctly in all cases