diff --git a/packages/beacon-node/src/execution/engine/utils.ts b/packages/beacon-node/src/execution/engine/utils.ts
index 720abf4c456a..559a9c2f57bb 100644
--- a/packages/beacon-node/src/execution/engine/utils.ts
+++ b/packages/beacon-node/src/execution/engine/utils.ts
@@ -36,8 +36,8 @@ export class ExecutionEngineMockJsonRpcClient implements IJsonRpcHttpClient {
   }
 }
 
-const fatalErrorCodes = ["ECONNREFUSED", "ENOTFOUND", "EAI_AGAIN"];
-const connectionErrorCodes = ["ECONNRESET", "ECONNABORTED"];
+export const HTTP_FATAL_ERROR_CODES = ["ECONNREFUSED", "ENOTFOUND", "EAI_AGAIN"];
+export const HTTP_CONNECTION_ERROR_CODES = ["ECONNRESET", "ECONNABORTED"];
 
 function getExecutionEngineStateForPayloadStatus(payloadStatus: ExecutePayloadStatus): ExecutionEngineState {
   switch (payloadStatus) {
@@ -75,11 +75,11 @@ function getExecutionEngineStateForPayloadError(
     return ExecutionEngineState.SYNCING;
   }
 
-  if (payloadError && isFetchError(payloadError) && fatalErrorCodes.includes(payloadError.code)) {
+  if (payloadError && isFetchError(payloadError) && HTTP_FATAL_ERROR_CODES.includes(payloadError.code)) {
     return ExecutionEngineState.OFFLINE;
   }
 
-  if (payloadError && isFetchError(payloadError) && connectionErrorCodes.includes(payloadError.code)) {
+  if (payloadError && isFetchError(payloadError) && HTTP_CONNECTION_ERROR_CODES.includes(payloadError.code)) {
     return ExecutionEngineState.AUTH_FAILED;
   }
 
diff --git a/packages/beacon-node/test/unit/execution/engine/utils.test.ts b/packages/beacon-node/test/unit/execution/engine/utils.test.ts
new file mode 100644
index 000000000000..95770a4f8ada
--- /dev/null
+++ b/packages/beacon-node/test/unit/execution/engine/utils.test.ts
@@ -0,0 +1,191 @@
+import {expect} from "chai";
+import {ErrorAborted} from "@lodestar/utils";
+import {ExecutePayloadStatus, ExecutionEngineState} from "../../../../src/execution/index.js";
+import {
+  HTTP_CONNECTION_ERROR_CODES,
+  HTTP_FATAL_ERROR_CODES,
+  getExecutionEngineState,
+} from "../../../../src/execution/engine/utils.js";
+import {QueueError, QueueErrorCode} from "../../../../src/util/queue/errors.js";
+import {ErrorJsonRpcResponse, HttpRpcError} from "../../../../src/eth1/provider/jsonRpcHttpClient.js";
+
+describe("execution/engine/utils", () => {
+  describe("getExecutionEngineState", () => {
+    const testCasesPayload: Record<
+      ExecutePayloadStatus,
+      [oldState: ExecutionEngineState, newState: ExecutionEngineState][]
+    > = {
+      [ExecutePayloadStatus.ACCEPTED]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCED],
+      ],
+      [ExecutePayloadStatus.VALID]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCED],
+      ],
+      [ExecutePayloadStatus.UNSAFE_OPTIMISTIC_STATUS]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCED],
+      ],
+      [ExecutePayloadStatus.ELERROR]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+      ],
+      [ExecutePayloadStatus.INVALID]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+      ],
+      [ExecutePayloadStatus.SYNCING]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+      ],
+      [ExecutePayloadStatus.INVALID_BLOCK_HASH]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+      ],
+      [ExecutePayloadStatus.UNAVAILABLE]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.OFFLINE],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.OFFLINE],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.OFFLINE],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.OFFLINE],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.OFFLINE],
+      ],
+      ["unknown" as ExecutePayloadStatus]: [
+        [ExecutionEngineState.ONLINE, ExecutionEngineState.ONLINE],
+        [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.ONLINE],
+        [ExecutionEngineState.OFFLINE, ExecutionEngineState.ONLINE],
+        [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+        [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+      ],
+    };
+
+    type ErrorTestCase = [
+      string,
+      Error,
+      [oldState: ExecutionEngineState, newState: ExecutionEngineState | undefined][],
+    ];
+    const testCasesError: ErrorTestCase[] = [
+      [
+        "abort error",
+        new ErrorAborted(),
+        [
+          [ExecutionEngineState.ONLINE, ExecutionEngineState.ONLINE],
+          [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.AUTH_FAILED],
+          [ExecutionEngineState.OFFLINE, ExecutionEngineState.OFFLINE],
+          [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+          [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+        ],
+      ],
+      [
+        "queue aborted error",
+        new QueueError({code: QueueErrorCode.QUEUE_ABORTED}),
+        [
+          [ExecutionEngineState.ONLINE, ExecutionEngineState.ONLINE],
+          [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.AUTH_FAILED],
+          [ExecutionEngineState.OFFLINE, ExecutionEngineState.OFFLINE],
+          [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCED],
+          [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+        ],
+      ],
+      [
+        "rpc error",
+        new HttpRpcError(12, "error"),
+        [
+          [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+        ],
+      ],
+      [
+        "rpc response error",
+        new ErrorJsonRpcResponse({jsonrpc: "2.0", id: 123, error: {code: 123, message: "error"}}, "error"),
+        [
+          [ExecutionEngineState.ONLINE, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.OFFLINE, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.SYNCED, ExecutionEngineState.SYNCING],
+          [ExecutionEngineState.SYNCING, ExecutionEngineState.SYNCING],
+        ],
+      ],
+      ...HTTP_FATAL_ERROR_CODES.map(
+        (code) =>
+          [
+            `http error with code '${code}'`,
+            {code: code, errno: "error"} as unknown as Error,
+            [
+              [ExecutionEngineState.ONLINE, ExecutionEngineState.OFFLINE],
+              [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.OFFLINE],
+              [ExecutionEngineState.OFFLINE, ExecutionEngineState.OFFLINE],
+              [ExecutionEngineState.SYNCED, ExecutionEngineState.OFFLINE],
+              [ExecutionEngineState.SYNCING, ExecutionEngineState.OFFLINE],
+            ],
+          ] as ErrorTestCase
+      ),
+      ...HTTP_CONNECTION_ERROR_CODES.map(
+        (code) =>
+          [
+            `http error with code '${code}'`,
+            {code: code, errno: "error"} as unknown as Error,
+            [
+              [ExecutionEngineState.ONLINE, ExecutionEngineState.AUTH_FAILED],
+              [ExecutionEngineState.AUTH_FAILED, ExecutionEngineState.AUTH_FAILED],
+              [ExecutionEngineState.OFFLINE, ExecutionEngineState.AUTH_FAILED],
+              [ExecutionEngineState.SYNCED, ExecutionEngineState.AUTH_FAILED],
+              [ExecutionEngineState.SYNCING, ExecutionEngineState.AUTH_FAILED],
+            ],
+          ] as ErrorTestCase
+      ),
+      [
+        "unknown error",
+        new Error("unknown error"),
+        [
+          [ExecutionEngineState.ONLINE, undefined],
+          [ExecutionEngineState.AUTH_FAILED, undefined],
+          [ExecutionEngineState.OFFLINE, undefined],
+          [ExecutionEngineState.SYNCED, undefined],
+          [ExecutionEngineState.SYNCING, undefined],
+        ],
+      ],
+    ];
+
+    for (const payloadStatus of Object.keys(testCasesPayload) as ExecutePayloadStatus[]) {
+      for (const [oldState, newState] of testCasesPayload[payloadStatus]) {
+        it(`should transition from "${oldState}" to "${newState}" on payload status "${payloadStatus}"`, () => {
+          expect(getExecutionEngineState({payloadStatus, oldState})).to.equal(newState);
+        });
+      }
+    }
+
+    for (const testCase of testCasesError) {
+      const [message, payloadError, errorCases] = testCase;
+      for (const [oldState, newState] of errorCases) {
+        it(`should transition from "${oldState}" to "${newState}" on error "${message}"`, () => {
+          expect(getExecutionEngineState({payloadError, oldState})).to.equal(newState);
+        });
+      }
+    }
+  });
+});