diff --git a/lib/config/env.go b/lib/config/env.go
index 71172765f..53e164896 100644
--- a/lib/config/env.go
+++ b/lib/config/env.go
@@ -13,32 +13,35 @@ import (
 )
 
 const (
-	E2E_TEST_LOG_COLLECT_ENV                = "E2E_TEST_LOG_COLLECT"
-	E2E_TEST_LOGGING_RUN_ID_ENV             = "E2E_TEST_LOGGING_RUN_ID"
-	E2E_TEST_LOG_STREAM_LOG_TARGETS_ENV     = "E2E_TEST_LOG_STREAM_LOG_TARGETS"
-	E2E_TEST_LOKI_TENANT_ID_ENV             = "E2E_TEST_LOKI_TENANT_ID"
-	E2E_TEST_LOKI_ENDPOINT_ENV              = "E2E_TEST_LOKI_ENDPOINT"
-	E2E_TEST_LOKI_BASIC_AUTH_ENV            = "E2E_TEST_LOKI_BASIC_AUTH"
-	E2E_TEST_LOKI_BEARER_TOKEN_ENV          = "E2E_TEST_LOKI_BEARER_TOKEN" // #nosec G101
-	E2E_TEST_GRAFANA_BASE_URL_ENV           = "E2E_TEST_GRAFANA_BASE_URL"
-	E2E_TEST_GRAFANA_DASHBOARD_URL_ENV      = "E2E_TEST_GRAFANA_DASHBOARD_URL"
-	E2E_TEST_GRAFANA_BEARER_TOKEN_ENV       = "E2E_TEST_GRAFANA_BEARER_TOKEN" // #nosec G101
-	E2E_TEST_PYROSCOPE_ENABLED_ENV          = "E2E_TEST_PYROSCOPE_ENABLED"
-	E2E_TEST_PYROSCOPE_SERVER_URL_ENV       = "E2E_TEST_PYROSCOPE_SERVER_URL"
-	E2E_TEST_PYROSCOPE_KEY_ENV              = "E2E_TEST_PYROSCOPE_KEY"
-	E2E_TEST_PYROSCOPE_ENVIRONMENT_ENV      = "E2E_TEST_PYROSCOPE_ENVIRONMENT"
-	E2E_TEST_CHAINLINK_IMAGE_ENV            = "E2E_TEST_CHAINLINK_IMAGE"
-	E2E_TEST_CHAINLINK_VERSION_ENV          = "E2E_TEST_CHAINLINK_VERSION"
-	E2E_TEST_CHAINLINK_POSTGRES_VERSION_ENV = "E2E_TEST_CHAINLINK_POSTGRES_VERSION"
-	E2E_TEST_CHAINLINK_UPGRADE_IMAGE_ENV    = "E2E_TEST_CHAINLINK_UPGRADE_IMAGE"
-	E2E_TEST_CHAINLINK_UPGRADE_VERSION_ENV  = "E2E_TEST_CHAINLINK_UPGRADE_VERSION"
-	E2E_TEST_SELECTED_NETWORK_ENV           = `E2E_TEST_SELECTED_NETWORK`
-	E2E_TEST_WALLET_KEY_ENV                 = `E2E_TEST_(.+)_WALLET_KEY$`
-	E2E_TEST_WALLET_KEYS_ENV                = `E2E_TEST_(.+)_WALLET_KEY_(\d+)$`
-	E2E_TEST_RPC_HTTP_URL_ENV               = `E2E_TEST_(.+)_RPC_HTTP_URL$`
-	E2E_TEST_RPC_HTTP_URLS_ENV              = `E2E_TEST_(.+)_RPC_HTTP_URL_(\d+)$`
-	E2E_TEST_RPC_WS_URL_ENV                 = `E2E_TEST_(.+)_RPC_WS_URL$`
-	E2E_TEST_RPC_WS_URLS_ENV                = `E2E_TEST_(.+)_RPC_WS_URL_(\d+)$`
+	E2E_TEST_LOG_COLLECT_ENV                          = "E2E_TEST_LOG_COLLECT"
+	E2E_TEST_LOGGING_RUN_ID_ENV                       = "E2E_TEST_LOGGING_RUN_ID"
+	E2E_TEST_LOG_STREAM_LOG_TARGETS_ENV               = "E2E_TEST_LOG_STREAM_LOG_TARGETS"
+	E2E_TEST_LOKI_TENANT_ID_ENV                       = "E2E_TEST_LOKI_TENANT_ID"
+	E2E_TEST_LOKI_ENDPOINT_ENV                        = "E2E_TEST_LOKI_ENDPOINT"
+	E2E_TEST_LOKI_BASIC_AUTH_ENV                      = "E2E_TEST_LOKI_BASIC_AUTH"
+	E2E_TEST_LOKI_BEARER_TOKEN_ENV                    = "E2E_TEST_LOKI_BEARER_TOKEN" // #nosec G101
+	E2E_TEST_GRAFANA_BASE_URL_ENV                     = "E2E_TEST_GRAFANA_BASE_URL"
+	E2E_TEST_GRAFANA_DASHBOARD_URL_ENV                = "E2E_TEST_GRAFANA_DASHBOARD_URL"
+	E2E_TEST_GRAFANA_BEARER_TOKEN_ENV                 = "E2E_TEST_GRAFANA_BEARER_TOKEN" // #nosec G101
+	E2E_TEST_PYROSCOPE_ENABLED_ENV                    = "E2E_TEST_PYROSCOPE_ENABLED"
+	E2E_TEST_PYROSCOPE_SERVER_URL_ENV                 = "E2E_TEST_PYROSCOPE_SERVER_URL"
+	E2E_TEST_PYROSCOPE_KEY_ENV                        = "E2E_TEST_PYROSCOPE_KEY"
+	E2E_TEST_PYROSCOPE_ENVIRONMENT_ENV                = "E2E_TEST_PYROSCOPE_ENVIRONMENT"
+	E2E_TEST_CHAINLINK_IMAGE_ENV                      = "E2E_TEST_CHAINLINK_IMAGE"
+	E2E_TEST_CHAINLINK_VERSION_ENV                    = "E2E_TEST_CHAINLINK_VERSION"
+	E2E_TEST_CHAINLINK_POSTGRES_VERSION_ENV           = "E2E_TEST_CHAINLINK_POSTGRES_VERSION"
+	E2E_TEST_CHAINLINK_UPGRADE_IMAGE_ENV              = "E2E_TEST_CHAINLINK_UPGRADE_IMAGE"
+	E2E_TEST_CHAINLINK_UPGRADE_VERSION_ENV            = "E2E_TEST_CHAINLINK_UPGRADE_VERSION"
+	E2E_TEST_SELECTED_NETWORK_ENV                     = `E2E_TEST_SELECTED_NETWORK`
+	E2E_TEST_WALLET_KEY_ENV                           = `E2E_TEST_(.+)_WALLET_KEY$`
+	E2E_TEST_WALLET_KEYS_ENV                          = `E2E_TEST_(.+)_WALLET_KEY_(\d+)$`
+	E2E_TEST_RPC_HTTP_URL_ENV                         = `E2E_TEST_(.+)_RPC_HTTP_URL$`
+	E2E_TEST_RPC_HTTP_URLS_ENV                        = `E2E_TEST_(.+)_RPC_HTTP_URL_(\d+)$`
+	E2E_TEST_RPC_WS_URL_ENV                           = `E2E_TEST_(.+)_RPC_WS_URL$`
+	E2E_TEST_RPC_WS_URLS_ENV                          = `E2E_TEST_(.+)_RPC_WS_URL_(\d+)$`
+	E2E_TEST_PRIVATE_ETHEREUM_EXECUTION_LAYER_ENV     = "E2E_TEST_PRIVATE_ETHEREUM_EXECUTION_LAYER"
+	E2E_TEST_PRIVATE_ETHEREUM_ETHEREUM_VERSION_ENV    = "E2E_TEST_PRIVATE_ETHEREUM_ETHEREUM_VERSION"
+	E2E_TEST_PRIVATE_ETHEREUM_CUSTOM_DOCKER_IMAGE_ENV = "E2E_TEST_PRIVATE_ETHEREUM_CUSTOM_DOCKER_IMAGE"
 )
 
 func MustReadEnvVar_String(name string) string {
diff --git a/lib/config/testconfig.go b/lib/config/testconfig.go
index afe287fa6..1e74f936c 100644
--- a/lib/config/testconfig.go
+++ b/lib/config/testconfig.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/smartcontractkit/chainlink-testing-framework/seth"
 
+	"github.com/smartcontractkit/chainlink-testing-framework/lib/config/types"
 	"github.com/smartcontractkit/chainlink-testing-framework/lib/logging"
 )
 
@@ -284,6 +285,36 @@ func (c *TestConfig) ReadFromEnvVar() error {
 		c.ChainlinkUpgradeImage.Version = &chainlinkUpgradeVersion
 	}
 
+	ethereumExecutionLayer := MustReadEnvVar_String(E2E_TEST_PRIVATE_ETHEREUM_EXECUTION_LAYER_ENV)
+	if ethereumExecutionLayer != "" {
+		if c.PrivateEthereumNetwork == nil {
+			c.PrivateEthereumNetwork = &EthereumNetworkConfig{}
+		}
+		logger.Debug().Msgf("Using %s env var to override PrivateEthereumNetwork.ExecutionLayer", E2E_TEST_PRIVATE_ETHEREUM_EXECUTION_LAYER_ENV)
+		el := types.ExecutionLayer(ethereumExecutionLayer)
+		c.PrivateEthereumNetwork.ExecutionLayer = &el
+	}
+
+	ethereumVersion := MustReadEnvVar_String(E2E_TEST_PRIVATE_ETHEREUM_ETHEREUM_VERSION_ENV)
+	if ethereumVersion != "" {
+		if c.PrivateEthereumNetwork == nil {
+			c.PrivateEthereumNetwork = &EthereumNetworkConfig{}
+		}
+		logger.Debug().Msgf("Using %s env var to override PrivateEthereumNetwork.EthereumVersion", E2E_TEST_PRIVATE_ETHEREUM_ETHEREUM_VERSION_ENV)
+		ev := types.EthereumVersion(ethereumVersion)
+		c.PrivateEthereumNetwork.EthereumVersion = &ev
+	}
+
+	customDockerImage := MustReadEnvVar_String(E2E_TEST_PRIVATE_ETHEREUM_CUSTOM_DOCKER_IMAGE_ENV)
+	if customDockerImage != "" {
+		if c.PrivateEthereumNetwork == nil {
+			c.PrivateEthereumNetwork = &EthereumNetworkConfig{}
+		}
+		logger.Debug().Msgf("Using %s env var to override PrivateEthereumNetwork.CustomDockerImages", E2E_TEST_PRIVATE_ETHEREUM_CUSTOM_DOCKER_IMAGE_ENV)
+		customImages := map[ContainerType]string{"execution_layer": customDockerImage}
+		c.PrivateEthereumNetwork.CustomDockerImages = customImages
+	}
+
 	return nil
 }