diff --git a/builder.go b/builder.go
index f5658ec..af5a16e 100644
--- a/builder.go
+++ b/builder.go
@@ -165,7 +165,7 @@ func (sdb *builder) WriteStateDiffTracked(
 	args Args, params Params,
 	nodeSink sdtypes.StateNodeSink,
 	ipldSink sdtypes.IPLDSink,
-	tracker *tracker.Tracker,
+	tracker tracker.Tracker,
 ) error {
 	defer metrics.UpdateDuration(time.Now(), metrics.IndexerMetrics.WriteStateDiffTimer)
 	// Load tries for old and new states
@@ -194,9 +194,9 @@ func (sdb *builder) WriteStateDiffTracked(
 		return fmt.Errorf("error restoring iterators: %w", err)
 	}
 
-	if subiters != nil {
+	if len(subiters) != 0 {
 		// Completed iterators are not saved by the tracker, so restoring fewer than configured is ok,
-		// but having too many is not expected.
+		// but having too many is a problem.
 		if len(subiters) > int(sdb.subtrieWorkers) {
 			return fmt.Errorf("restored too many iterators: expected %d, got %d",
 				sdb.subtrieWorkers, len(subiters))
diff --git a/go.mod b/go.mod
index ffb599b..7e2e6f1 100644
--- a/go.mod
+++ b/go.mod
@@ -124,8 +124,8 @@ require (
 )
 
 replace (
-	github.com/cerc-io/eth-iterator-utils => git.vdb.to/cerc-io/eth-iterator-utils v0.1.1
-	github.com/cerc-io/eth-testing => git.vdb.to/cerc-io/eth-testing v0.2.1
+	github.com/cerc-io/eth-iterator-utils => git.vdb.to/cerc-io/eth-iterator-utils v0.1.2-0.20230925184550-062eb329435f
+	github.com/cerc-io/eth-testing => git.vdb.to/cerc-io/eth-testing v0.3.1-0.20230925181540-2ea71042e7e0
 	github.com/ethereum/go-ethereum => git.vdb.to/cerc-io/plugeth v0.0.0-20230808125822-691dc334fab1
 	github.com/openrelayxyz/plugeth-utils => git.vdb.to/cerc-io/plugeth-utils v0.0.0-20230706160122-cd41de354c46
 )
diff --git a/go.sum b/go.sum
index 0cd8482..74a0fe7 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,8 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-git.vdb.to/cerc-io/eth-iterator-utils v0.1.1 h1:AGen4U2GaYJVzPjEo3U+GPczSfOUEMkM1nWTM+cq5Dk=
-git.vdb.to/cerc-io/eth-iterator-utils v0.1.1/go.mod h1:uiocO9elfDe78kd3c/VZ2in26V+gyXJuN+sdTxK4Xag=
-git.vdb.to/cerc-io/eth-testing v0.2.1 h1:IZAX7DVgzPkSmu1xdKZ5aOemdEYbvtgae7GUl/TUNtQ=
-git.vdb.to/cerc-io/eth-testing v0.2.1/go.mod h1:qdvpc/W1xvf2MKx3rMOqvFvYaYIHG77Z1g0lwsmw0Uk=
+git.vdb.to/cerc-io/eth-iterator-utils v0.1.2-0.20230925184550-062eb329435f h1:sIuSkD6U7uYD/FGfvWOBViIuaHd+YhLM0Hln+4BQM10=
+git.vdb.to/cerc-io/eth-iterator-utils v0.1.2-0.20230925184550-062eb329435f/go.mod h1:Xv+d7Q11qGJcggcfxoj2JEvJJBKj0C66I6PyG5/lz9o=
+git.vdb.to/cerc-io/eth-testing v0.3.1-0.20230925181540-2ea71042e7e0 h1:fWAvsSiuDqveuxwnfc8psInfLZhMqHlQnmOpOHsd8Tk=
+git.vdb.to/cerc-io/eth-testing v0.3.1-0.20230925181540-2ea71042e7e0/go.mod h1:qdvpc/W1xvf2MKx3rMOqvFvYaYIHG77Z1g0lwsmw0Uk=
 git.vdb.to/cerc-io/plugeth v0.0.0-20230808125822-691dc334fab1 h1:KLjxHwp9Zp7xhECccmJS00RiL+VwTuUGLU7qeIctg8g=
 git.vdb.to/cerc-io/plugeth v0.0.0-20230808125822-691dc334fab1/go.mod h1:cYXZu70+6xmDgIgrTD81GPasv16piiAFJnKyAbwVPMU=
 git.vdb.to/cerc-io/plugeth-utils v0.0.0-20230706160122-cd41de354c46 h1:KYcbbne/RXd7AuxbUd/3hgk1jPN+33k2CKiNsUsMCC0=