diff --git a/pkg/geth/client/rpc_client.go b/pkg/geth/client/rpc_client.go
index bbaf26a2..e8453e87 100644
--- a/pkg/geth/client/rpc_client.go
+++ b/pkg/geth/client/rpc_client.go
@@ -24,7 +24,7 @@ func (client RpcClient) CallContext(ctx context.Context, result interface{}, met
 	if args == nil {
 		return client.client.CallContext(ctx, result, method)
 	} else {
-		return client.client.CallContext(ctx, result, method, args)
+		return client.client.CallContext(ctx, result, method, args...)
 	}
 }
 
diff --git a/pkg/transformers/price_feeds/integration_test.go b/pkg/transformers/price_feeds/integration_test.go
new file mode 100644
index 00000000..9789b71c
--- /dev/null
+++ b/pkg/transformers/price_feeds/integration_test.go
@@ -0,0 +1,146 @@
+package price_feeds_test
+
+import (
+	"context"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/geth"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/client"
+	rpc2 "github.com/vulcanize/vulcanizedb/pkg/geth/converters/rpc"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/node"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/price_feeds"
+	"github.com/vulcanize/vulcanizedb/test_config"
+	"math/big"
+)
+
+var _ = Describe("Price feeds transformer", func() {
+	var (
+		db         *postgres.DB
+		blockChain core.BlockChain
+	)
+
+	BeforeEach(func() {
+		ipc := "https://kovan.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
+		rpcClient, ethClient, err := getClients(ipc)
+		Expect(err).NotTo(HaveOccurred())
+		blockChain, err = getBlockChain(rpcClient, ethClient)
+		Expect(err).NotTo(HaveOccurred())
+		db = test_config.NewTestDB(blockChain.Node())
+		test_config.CleanTestDB(db)
+
+		for i := 8763054; i < 8763063; i++ {
+			err = persistHeader(rpcClient, db, int64(i))
+			Expect(err).NotTo(HaveOccurred())
+		}
+	})
+
+	It("persists a ETH/USD price feed event", func() {
+		config := price_feeds.IPriceFeedConfig{
+			ContractAddresses:   []string{"0x9FfFE440258B79c5d6604001674A4722FfC0f7Bc"},
+			StartingBlockNumber: 8763054,
+			EndingBlockNumber:   8763054,
+		}
+		transformerInitializer := price_feeds.PriceFeedTransformerInitializer{Config: config}
+		transformer := transformerInitializer.NewPriceFeedTransformer(db, blockChain)
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		var model price_feeds.PriceFeedModel
+		err = db.Get(&model, `SELECT block_number, medianizer_address, usd_value, tx_idx, raw_log FROM maker.price_feeds WHERE block_number = $1`, config.StartingBlockNumber)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model.UsdValue).To(Equal("207.314891143"))
+	})
+
+	It("persists a MKR/USD price feed event", func() {
+		config := price_feeds.IPriceFeedConfig{
+			ContractAddresses:   []string{"0xB1997239Cfc3d15578A3a09730f7f84A90BB4975"},
+			StartingBlockNumber: 8763059,
+			EndingBlockNumber:   8763059,
+		}
+		transformerInitializer := price_feeds.PriceFeedTransformerInitializer{Config: config}
+		transformer := transformerInitializer.NewPriceFeedTransformer(db, blockChain)
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		var model price_feeds.PriceFeedModel
+		err = db.Get(&model, `SELECT block_number, medianizer_address, usd_value, tx_idx, raw_log FROM maker.price_feeds WHERE block_number = $1`, config.StartingBlockNumber)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model.UsdValue).To(Equal("391.803979212"))
+	})
+
+	It("persists a REP/USD price feed event", func() {
+		config := price_feeds.IPriceFeedConfig{
+			ContractAddresses:   []string{"0xf88bBDc1E2718F8857F30A180076ec38d53cf296"},
+			StartingBlockNumber: 8763062,
+			EndingBlockNumber:   8763062,
+		}
+		transformerInitializer := price_feeds.PriceFeedTransformerInitializer{Config: config}
+		transformer := transformerInitializer.NewPriceFeedTransformer(db, blockChain)
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		var model price_feeds.PriceFeedModel
+		err = db.Get(&model, `SELECT block_number, medianizer_address, usd_value, tx_idx, raw_log FROM maker.price_feeds WHERE block_number = $1`, config.StartingBlockNumber)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model.UsdValue).To(Equal("12.8169284827"))
+	})
+})
+
+type POAHeader struct {
+	ParentHash  common.Hash    `json:"parentHash"       gencodec:"required"`
+	UncleHash   common.Hash    `json:"sha3Uncles"       gencodec:"required"`
+	Coinbase    common.Address `json:"miner"            gencodec:"required"`
+	Root        common.Hash    `json:"stateRoot"        gencodec:"required"`
+	TxHash      common.Hash    `json:"transactionsRoot" gencodec:"required"`
+	ReceiptHash common.Hash    `json:"receiptsRoot"     gencodec:"required"`
+	Bloom       types.Bloom    `json:"logsBloom"        gencodec:"required"`
+	Difficulty  *hexutil.Big   `json:"difficulty"       gencodec:"required"`
+	Number      *hexutil.Big   `json:"number"           gencodec:"required"`
+	GasLimit    hexutil.Uint64 `json:"gasLimit"         gencodec:"required"`
+	GasUsed     hexutil.Uint64 `json:"gasUsed"          gencodec:"required"`
+	Time        *hexutil.Big   `json:"timestamp"        gencodec:"required"`
+	Extra       hexutil.Bytes  `json:"extraData"        gencodec:"required"`
+	Hash        common.Hash    `json:"hash"`
+}
+
+func getClients(ipc string) (client.RpcClient, *ethclient.Client, error) {
+	raw, err := rpc.Dial(ipc)
+	if err != nil {
+		return client.RpcClient{}, &ethclient.Client{}, err
+	}
+	return client.NewRpcClient(raw, ipc), ethclient.NewClient(raw), nil
+}
+
+func getBlockChain(rpcClient client.RpcClient, ethClient *ethclient.Client) (core.BlockChain, error) {
+	client := client.NewEthClient(ethClient)
+	node := node.MakeNode(rpcClient)
+	transactionConverter := rpc2.NewRpcTransactionConverter(client)
+	blockChain := geth.NewBlockChain(client, node, transactionConverter)
+	return blockChain, nil
+}
+
+func persistHeader(rpcClient client.RpcClient, db *postgres.DB, blockNumber int64) error {
+	var poaHeader POAHeader
+	blockNumberArg := hexutil.EncodeBig(big.NewInt(int64(blockNumber)))
+	err := rpcClient.CallContext(context.Background(), &poaHeader, "eth_getBlockByNumber", blockNumberArg, false)
+	if err != nil {
+		return err
+	}
+	headerRepository := repositories.NewHeaderRepository(db)
+	_, err = headerRepository.CreateOrUpdateHeader(core.Header{
+		BlockNumber: poaHeader.Number.ToInt().Int64(),
+		Hash:        poaHeader.Hash.String(),
+	})
+	return err
+}