diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd3d8fe607..1888cb3a2a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,12 +60,13 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (rpc) [tharsis#661](https://github.com/tharsis/ethermint/pull/661) Fix OOM bug when creating too many filters using JSON-RPC.
 * (evm) [tharsis#660](https://github.com/tharsis/ethermint/pull/660) Fix `nil` pointer panic in `ApplyNativeMessage`.
 * (evm, test) [tharsis#649](https://github.com/tharsis/ethermint/pull/649) Test DynamicFeeTx.
-* (evm) [tharsis#702](https://github.com/tharsis/ethermint/pull/702) Fix panic in web3 RPC handlers 
+* (evm) [tharsis#702](https://github.com/tharsis/ethermint/pull/702) Fix panic in web3 RPC handlers
 * (rpc) [tharsis#720](https://github.com/tharsis/ethermint/pull/720) Fix `debug_traceTransaction` failure
 * (rpc) [tharsis#743](https://github.com/tharsis/ethermint/pull/743) Fix debug JSON RPC handler crash on non-existing block
 
 ### Improvements
 
+* (tests) [tharsis#704](https://github.com/tharsis/ethermint/pull/704) Introduce E2E testing framework for clients
 * (deps) [tharsis#737](https://github.com/tharsis/ethermint/pull/737) Bump ibc-go to [`v2.0.0`](https://github.com/cosmos/ibc-go/releases/tag/v2.0.0)
 * (rpc) [tharsis#671](https://github.com/tharsis/ethermint/pull/671) Don't pass base fee externally for `EthCall`/`EthEstimateGas` apis.
 * (evm) [tharsis#674](https://github.com/tharsis/ethermint/pull/674) Refactor `ApplyMessage`, remove
diff --git a/go.mod b/go.mod
index ba339daaf4..4d23aa6bc7 100644
--- a/go.mod
+++ b/go.mod
@@ -19,6 +19,7 @@ require (
 	github.com/improbable-eng/grpc-web v0.15.0
 	github.com/klauspost/compress v1.11.9 // indirect
 	github.com/miguelmota/go-ethereum-hdwallet v0.1.1
+	github.com/onsi/ginkgo v1.16.5
 	github.com/palantir/stacktrace v0.0.0-20161112013806-78658fd2d177
 	github.com/pkg/errors v0.9.1
 	github.com/rakyll/statik v0.1.7
@@ -42,8 +43,6 @@ require (
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-require github.com/onsi/ginkgo v1.16.5
-
 require (
 	filippo.io/edwards25519 v1.0.0-beta.2 // indirect
 	github.com/99designs/keyring v1.1.6 // indirect
diff --git a/testutil/network/util.go b/testutil/network/util.go
index 4208c9e1ab..fe3e138c36 100644
--- a/testutil/network/util.go
+++ b/testutil/network/util.go
@@ -259,10 +259,5 @@ func WriteFile(name string, dir string, contents []byte) error {
 		return err
 	}
 
-	err = tmos.WriteFile(file, contents, 0o644)
-	if err != nil {
-		return err
-	}
-
-	return nil
+	return tmos.WriteFile(file, contents, 0o644)
 }