diff --git a/op-e2e/system/e2esys/setup.go b/op-e2e/system/e2esys/setup.go
index cc52c983a4c8..9517b9d1aaa3 100644
--- a/op-e2e/system/e2esys/setup.go
+++ b/op-e2e/system/e2esys/setup.go
@@ -116,6 +116,7 @@ func DefaultSystemConfig(t testing.TB, opts ...SystemConfigOpt) SystemConfig {
 	require.NoError(t, err)
 	deployConfig := config.DeployConfig(sco.AllocType)
 	deployConfig.L1GenesisBlockTimestamp = hexutil.Uint64(time.Now().Unix())
+	deployConfig.L2GenesisBlobTimeOffset = nil
 	e2eutils.ApplyDeployConfigForks(deployConfig)
 	require.NoError(t, deployConfig.Check(testlog.Logger(t, log.LevelInfo)),
 		"Deploy config is invalid, do you need to run make devnet-allocs?")