diff --git a/api/test/window_post.go b/api/test/window_post.go
index 0a7940513..d21224670 100644
--- a/api/test/window_post.go
+++ b/api/test/window_post.go
@@ -201,7 +201,7 @@ func pledgeSectors(t *testing.T, ctx context.Context, miner TestStorageNode, n,
 
 func TestWindowPost(t *testing.T, b APIBuilder, blocktime time.Duration, nSectors int) {
 	for _, height := range []abi.ChainEpoch{
-		1,    // before
+		2,    // before
 		162,  // while sealing
 		5000, // while proving
 	} {