diff --git a/integration-tests/testconfig/default.toml b/integration-tests/testconfig/default.toml
index 25d76429d75..6ba70d31216 100644
--- a/integration-tests/testconfig/default.toml
+++ b/integration-tests/testconfig/default.toml
@@ -76,9 +76,9 @@ transaction_timeout = "3m"
 transfer_gas_fee = 40_000
 gas_limit = 30_000_000
 # legacy transactions
-gas_price = 20_000_000_000
+gas_price = 50_000_000_000
 # EIP-1559 transactions
-# eip_1559_dynamic_fees = true2
+# eip_1559_dynamic_fees = true
 gas_fee_cap = 45_000_000_000
 gas_tip_cap = 10_000_000_000
 
diff --git a/integration-tests/testconfig/testconfig.go b/integration-tests/testconfig/testconfig.go
index 7f27ba76700..cd44eb5aa33 100644
--- a/integration-tests/testconfig/testconfig.go
+++ b/integration-tests/testconfig/testconfig.go
@@ -304,12 +304,7 @@ func GetConfig(configurationName string, product Product) (TestConfig, error) {
 		case Automation:
 			return handleAutomationConfigOverride(logger, filename, configurationName, target, content)
 		default:
-			err := ctf_config.BytesToAnyTomlStruct(logger, filename, configurationName, &testConfig, content)
-			if err != nil {
-				return errors.Wrapf(err, "error reading file %s", filename)
-			}
-
-			return nil
+			return handleDefaultConfigOverride(logger, filename, configurationName, target, content)
 		}
 	}
 
@@ -570,3 +565,33 @@ func handleAutomationConfigOverride(logger zerolog.Logger, filename, configurati
 
 	return nil
 }
+
+func handleDefaultConfigOverride(logger zerolog.Logger, filename, configurationName string, target *TestConfig, content []byte) error {
+	logger.Debug().Msgf("Handling default config override for %s", filename)
+	oldConfig := MustCopy(target)
+	newConfig := TestConfig{}
+
+	err := ctf_config.BytesToAnyTomlStruct(logger, filename, configurationName, &target, content)
+	if err != nil {
+		return errors.Wrapf(err, "error reading file %s", filename)
+	}
+
+	err = ctf_config.BytesToAnyTomlStruct(logger, filename, configurationName, &newConfig, content)
+	if err != nil {
+		return errors.Wrapf(err, "error reading file %s", filename)
+	}
+
+	// override instead of merging
+	if (newConfig.Seth != nil && len(newConfig.Seth.Networks) > 0) && (oldConfig != nil && oldConfig.Seth != nil && len(oldConfig.Seth.Networks) > 0) {
+		for i, old_network := range oldConfig.Seth.Networks {
+			for _, new_network := range newConfig.Seth.Networks {
+				if old_network.ChainID == new_network.ChainID {
+					oldConfig.Seth.Networks[i] = new_network
+				}
+			}
+		}
+		target.Seth.Networks = oldConfig.Seth.Networks
+	}
+
+	return nil
+}