diff --git a/core/chains/evm/client/errors.go b/core/chains/evm/client/errors.go
index 4c4e0c0b793..b5e45672976 100644
--- a/core/chains/evm/client/errors.go
+++ b/core/chains/evm/client/errors.go
@@ -158,7 +158,7 @@ var arbitrum = ClientErrors{
 	Fatal:                 arbitrumFatal,
 	L2FeeTooLow:           regexp.MustCompile(`(: |^)max fee per gas less than block base fee(:|$)`),
 	L2Full:                regexp.MustCompile(`(: |^)(queue full|sequencer pending tx pool full, please try again)(:|$)`),
-	ServiceUnavailable:    regexp.MustCompile(`(: |^)502 Bad Gateway: [\s\S]*$|network is unreachable|observed invariant violation on SendTransaction`),
+	ServiceUnavailable:    regexp.MustCompile(`(: |^)502 Bad Gateway: [\s\S]*$|network is unreachable|i/o timeout`),
 }
 
 var celo = ClientErrors{
diff --git a/core/chains/evm/client/errors_test.go b/core/chains/evm/client/errors_test.go
index ab081a2bc4d..c455f4ba252 100644
--- a/core/chains/evm/client/errors_test.go
+++ b/core/chains/evm/client/errors_test.go
@@ -229,7 +229,7 @@ func Test_Eth_Errors(t *testing.T) {
 		tests := []errorCase{
 			{"call failed: 503 Service Unavailable: <html>\r\n<head><title>503 Service Temporarily Unavailable</title></head>\r\n<body>\r\n<center><h1>503 Service Temporarily Unavailable</h1></center>\r\n</body>\r\n</html>\r\n", true, "Nethermind"},
 			{"call failed: 502 Bad Gateway: <html>\r\n<head><title>502 Bad Gateway</title></head>\r\n<body>\r\n<center><h1>502 Bad Gateway</h1></center>\r\n<hr><center>", true, "Arbitrum"},
-			{"observed invariant violation on SendTransaction", true, "Arbitrum"},
+			{"i/o timeout", true, "Arbitrum"},
 			{"network is unreachable", true, "Arbitrum"},
 			{"client error service unavailable", true, "tomlConfig"},
 		}
