diff --git a/chains/chaindata_test.go b/chains/chaindata_test.go
index d83b164..b2b6564 100644
--- a/chains/chaindata_test.go
+++ b/chains/chaindata_test.go
@@ -47,7 +47,7 @@ func testReadChainData(t *testing.T, data *chaindata.Paths) {
 }
 
 func TestReadChainData(t *testing.T) {
-	for _, name := range []string{"small", "small2"} {
+	for _, name := range []string{"permerge1", "premerge2"} {
 		t.Run(name, func(t *testing.T) {
 			data, err := chaindata.GetFixture(name)
 			if err != nil {
diff --git a/chains/data/small/geth/000002.ldb b/chains/data/premerge1/geth/chaindata/000002.ldb
similarity index 100%
rename from chains/data/small/geth/000002.ldb
rename to chains/data/premerge1/geth/chaindata/000002.ldb
diff --git a/chains/data/small/geth/000004.ldb b/chains/data/premerge1/geth/chaindata/000004.ldb
similarity index 100%
rename from chains/data/small/geth/000004.ldb
rename to chains/data/premerge1/geth/chaindata/000004.ldb
diff --git a/chains/data/small/geth/ancient/bodies.0000.cdat b/chains/data/premerge1/geth/chaindata/ancient/bodies.0000.cdat
similarity index 100%
rename from chains/data/small/geth/ancient/bodies.0000.cdat
rename to chains/data/premerge1/geth/chaindata/ancient/bodies.0000.cdat
diff --git a/chains/data/small/geth/ancient/bodies.cidx b/chains/data/premerge1/geth/chaindata/ancient/bodies.cidx
similarity index 100%
rename from chains/data/small/geth/ancient/bodies.cidx
rename to chains/data/premerge1/geth/chaindata/ancient/bodies.cidx
diff --git a/chains/data/small/geth/ancient/bodies.meta b/chains/data/premerge1/geth/chaindata/ancient/bodies.meta
similarity index 100%
rename from chains/data/small/geth/ancient/bodies.meta
rename to chains/data/premerge1/geth/chaindata/ancient/bodies.meta
diff --git a/chains/data/small/geth/ancient/diffs.0000.rdat b/chains/data/premerge1/geth/chaindata/ancient/diffs.0000.rdat
similarity index 100%
rename from chains/data/small/geth/ancient/diffs.0000.rdat
rename to chains/data/premerge1/geth/chaindata/ancient/diffs.0000.rdat
diff --git a/chains/data/small/geth/ancient/diffs.meta b/chains/data/premerge1/geth/chaindata/ancient/diffs.meta
similarity index 100%
rename from chains/data/small/geth/ancient/diffs.meta
rename to chains/data/premerge1/geth/chaindata/ancient/diffs.meta
diff --git a/chains/data/small/geth/ancient/diffs.ridx b/chains/data/premerge1/geth/chaindata/ancient/diffs.ridx
similarity index 100%
rename from chains/data/small/geth/ancient/diffs.ridx
rename to chains/data/premerge1/geth/chaindata/ancient/diffs.ridx
diff --git a/chains/data/small/geth/ancient/hashes.0000.rdat b/chains/data/premerge1/geth/chaindata/ancient/hashes.0000.rdat
similarity index 100%
rename from chains/data/small/geth/ancient/hashes.0000.rdat
rename to chains/data/premerge1/geth/chaindata/ancient/hashes.0000.rdat
diff --git a/chains/data/small/geth/ancient/hashes.meta b/chains/data/premerge1/geth/chaindata/ancient/hashes.meta
similarity index 100%
rename from chains/data/small/geth/ancient/hashes.meta
rename to chains/data/premerge1/geth/chaindata/ancient/hashes.meta
diff --git a/chains/data/small/geth/ancient/hashes.ridx b/chains/data/premerge1/geth/chaindata/ancient/hashes.ridx
similarity index 100%
rename from chains/data/small/geth/ancient/hashes.ridx
rename to chains/data/premerge1/geth/chaindata/ancient/hashes.ridx
diff --git a/chains/data/small/geth/ancient/headers.0000.cdat b/chains/data/premerge1/geth/chaindata/ancient/headers.0000.cdat
similarity index 100%
rename from chains/data/small/geth/ancient/headers.0000.cdat
rename to chains/data/premerge1/geth/chaindata/ancient/headers.0000.cdat
diff --git a/chains/data/small/geth/ancient/headers.cidx b/chains/data/premerge1/geth/chaindata/ancient/headers.cidx
similarity index 100%
rename from chains/data/small/geth/ancient/headers.cidx
rename to chains/data/premerge1/geth/chaindata/ancient/headers.cidx
diff --git a/chains/data/small/geth/ancient/headers.meta b/chains/data/premerge1/geth/chaindata/ancient/headers.meta
similarity index 100%
rename from chains/data/small/geth/ancient/headers.meta
rename to chains/data/premerge1/geth/chaindata/ancient/headers.meta
diff --git a/chains/data/small/geth/ancient/receipts.0000.cdat b/chains/data/premerge1/geth/chaindata/ancient/receipts.0000.cdat
similarity index 100%
rename from chains/data/small/geth/ancient/receipts.0000.cdat
rename to chains/data/premerge1/geth/chaindata/ancient/receipts.0000.cdat
diff --git a/chains/data/small/geth/ancient/receipts.cidx b/chains/data/premerge1/geth/chaindata/ancient/receipts.cidx
similarity index 100%
rename from chains/data/small/geth/ancient/receipts.cidx
rename to chains/data/premerge1/geth/chaindata/ancient/receipts.cidx
diff --git a/chains/data/small/geth/ancient/receipts.meta b/chains/data/premerge1/geth/chaindata/ancient/receipts.meta
similarity index 100%
rename from chains/data/small/geth/ancient/receipts.meta
rename to chains/data/premerge1/geth/chaindata/ancient/receipts.meta
diff --git a/chains/data/small2/geth/000002.ldb b/chains/data/premerge2/geth/chaindata/000002.ldb
similarity index 100%
rename from chains/data/small2/geth/000002.ldb
rename to chains/data/premerge2/geth/chaindata/000002.ldb
diff --git a/chains/data/small2/geth/000003.ldb b/chains/data/premerge2/geth/chaindata/000003.ldb
similarity index 100%
rename from chains/data/small2/geth/000003.ldb
rename to chains/data/premerge2/geth/chaindata/000003.ldb
diff --git a/chains/data/small2/geth/ancient/chain/bodies.0000.cdat b/chains/data/premerge2/geth/chaindata/ancient/chain/bodies.0000.cdat
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/bodies.0000.cdat
rename to chains/data/premerge2/geth/chaindata/ancient/chain/bodies.0000.cdat
diff --git a/chains/data/small2/geth/ancient/chain/bodies.cidx b/chains/data/premerge2/geth/chaindata/ancient/chain/bodies.cidx
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/bodies.cidx
rename to chains/data/premerge2/geth/chaindata/ancient/chain/bodies.cidx
diff --git a/chains/data/small2/geth/ancient/chain/bodies.meta b/chains/data/premerge2/geth/chaindata/ancient/chain/bodies.meta
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/bodies.meta
rename to chains/data/premerge2/geth/chaindata/ancient/chain/bodies.meta
diff --git a/chains/data/small2/geth/ancient/chain/diffs.0000.rdat b/chains/data/premerge2/geth/chaindata/ancient/chain/diffs.0000.rdat
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/diffs.0000.rdat
rename to chains/data/premerge2/geth/chaindata/ancient/chain/diffs.0000.rdat
diff --git a/chains/data/small2/geth/ancient/chain/diffs.meta b/chains/data/premerge2/geth/chaindata/ancient/chain/diffs.meta
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/diffs.meta
rename to chains/data/premerge2/geth/chaindata/ancient/chain/diffs.meta
diff --git a/chains/data/small2/geth/ancient/chain/diffs.ridx b/chains/data/premerge2/geth/chaindata/ancient/chain/diffs.ridx
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/diffs.ridx
rename to chains/data/premerge2/geth/chaindata/ancient/chain/diffs.ridx
diff --git a/chains/data/small2/geth/ancient/chain/hashes.0000.rdat b/chains/data/premerge2/geth/chaindata/ancient/chain/hashes.0000.rdat
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/hashes.0000.rdat
rename to chains/data/premerge2/geth/chaindata/ancient/chain/hashes.0000.rdat
diff --git a/chains/data/small2/geth/ancient/chain/hashes.meta b/chains/data/premerge2/geth/chaindata/ancient/chain/hashes.meta
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/hashes.meta
rename to chains/data/premerge2/geth/chaindata/ancient/chain/hashes.meta
diff --git a/chains/data/small2/geth/ancient/chain/hashes.ridx b/chains/data/premerge2/geth/chaindata/ancient/chain/hashes.ridx
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/hashes.ridx
rename to chains/data/premerge2/geth/chaindata/ancient/chain/hashes.ridx
diff --git a/chains/data/small2/geth/ancient/chain/headers.0000.cdat b/chains/data/premerge2/geth/chaindata/ancient/chain/headers.0000.cdat
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/headers.0000.cdat
rename to chains/data/premerge2/geth/chaindata/ancient/chain/headers.0000.cdat
diff --git a/chains/data/small2/geth/ancient/chain/headers.cidx b/chains/data/premerge2/geth/chaindata/ancient/chain/headers.cidx
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/headers.cidx
rename to chains/data/premerge2/geth/chaindata/ancient/chain/headers.cidx
diff --git a/chains/data/small2/geth/ancient/chain/headers.meta b/chains/data/premerge2/geth/chaindata/ancient/chain/headers.meta
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/headers.meta
rename to chains/data/premerge2/geth/chaindata/ancient/chain/headers.meta
diff --git a/chains/data/small2/geth/ancient/chain/receipts.0000.cdat b/chains/data/premerge2/geth/chaindata/ancient/chain/receipts.0000.cdat
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/receipts.0000.cdat
rename to chains/data/premerge2/geth/chaindata/ancient/chain/receipts.0000.cdat
diff --git a/chains/data/small2/geth/ancient/chain/receipts.cidx b/chains/data/premerge2/geth/chaindata/ancient/chain/receipts.cidx
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/receipts.cidx
rename to chains/data/premerge2/geth/chaindata/ancient/chain/receipts.cidx
diff --git a/chains/data/small2/geth/ancient/chain/receipts.meta b/chains/data/premerge2/geth/chaindata/ancient/chain/receipts.meta
similarity index 100%
rename from chains/data/small2/geth/ancient/chain/receipts.meta
rename to chains/data/premerge2/geth/chaindata/ancient/chain/receipts.meta
diff --git a/chains/small/chain.go b/chains/premerge1/chain.go
similarity index 62%
rename from chains/small/chain.go
rename to chains/premerge1/chain.go
index ed8670e..5e11d9a 100644
--- a/chains/small/chain.go
+++ b/chains/premerge1/chain.go
@@ -1,11 +1,11 @@
-package small
+package premerge1
 
 import (
 	"github.com/cerc-io/eth-testing/chains"
 )
 
 var (
-	ChainData, err = chaindata.GetFixture("small")
+	ChainData, err = chains.GetFixture("premerge1")
 )
 
 func init() {
diff --git a/chains/small2/chain.go b/chains/premerge2/chain.go
similarity index 86%
rename from chains/small2/chain.go
rename to chains/premerge2/chain.go
index b63d39d..cdbd7ae 100644
--- a/chains/small2/chain.go
+++ b/chains/premerge2/chain.go
@@ -1,4 +1,4 @@
-package small2
+package premerge2
 
 import (
 	"github.com/cerc-io/eth-testing/chains"
@@ -6,7 +6,7 @@ import (
 )
 
 var (
-	ChainData, err = chaindata.GetFixture("small2")
+	ChainData, err = chains.GetFixture("premerge2")
 
 	// keybytes-encoded leaf keys of all state nodes
 	Block1_StateNodeLeafKeys [][]byte
diff --git a/chains/small2/paths.go b/chains/premerge2/paths.go
similarity index 99%
rename from chains/small2/paths.go
rename to chains/premerge2/paths.go
index 42b2f77..3f17384 100644
--- a/chains/small2/paths.go
+++ b/chains/premerge2/paths.go
@@ -1,4 +1,4 @@
-package small2
+package premerge2
 
 var Block1_StateNodePaths = [][]byte{
 	{},