diff --git a/core/package.json b/core/package.json
index 5deba3d90..cb27c4b08 100644
--- a/core/package.json
+++ b/core/package.json
@@ -63,7 +63,7 @@
     "adapter-hash": "node --no-warnings --import=specifier-resolution-node/register --experimental-json-modules dist/cli/generate-adapter-hash.js",
     "aggregator-hash": "node --no-warnings --import=specifier-resolution-node/register --experimental-json-modules dist/cli/generate-aggregator-hash.js",
     "flush": "node --no-warnings --import=specifier-resolution-node/register --experimental-json-modules dist/tools/flush-queues.js",
-    "test": "node --no-warnings --experimental-vm-modules node_modules/jest/bin/jest.js",
+    "test": "node --no-warnings --experimental-vm-modules node_modules/.bin/jest",
     "lint": "DEBUG=eslint:cli-engine eslint 'src/**/*.ts' 'src/*.ts' 'test/*.ts'",
     "bull-dashboard": "docker-compose -f docker-compose.bull-monitor.yaml up"
   },
diff --git a/core/src/api.ts b/core/src/api.ts
index 18afb3d3f..c0060a3f8 100644
--- a/core/src/api.ts
+++ b/core/src/api.ts
@@ -69,7 +69,11 @@ export async function getReporters({
     return (await axios.get(endpoint, { data: { service, chain } }))?.data
   } catch (e) {
     logger?.error({ name: 'getReporters', file: FILE_NAME, ...e }, 'error')
-    throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    if (e.code === 'ECONNREFUSED') {
+      throw new OraklError(OraklErrorCode.FailedToConnectAPI)
+    } else {
+      throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    }
   }
 }
 
@@ -92,8 +96,12 @@ export async function getReporter({
     const endpoint = buildUrl(ORAKL_NETWORK_API_URL, `reporter/${id}`)
     return (await axios.get(endpoint))?.data
   } catch (e) {
-    logger?.error({ name: 'getReporter', file: FILE_NAME, ...e }, 'error')
-    throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    logger?.error({ name: 'getReporters', file: FILE_NAME, ...e }, 'error')
+    if (e.code === 'ECONNREFUSED') {
+      throw new OraklError(OraklErrorCode.FailedToConnectAPI)
+    } else {
+      throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    }
   }
 }
 
@@ -131,7 +139,11 @@ export async function getReporterByOracleAddress({
     return reporter[0]
   } catch (e) {
     logger.error({ name: 'getReportersByOracleAddress', file: FILE_NAME, ...e }, 'error')
-    throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    if (e.code === 'ECONNREFUSED') {
+      throw new OraklError(OraklErrorCode.FailedToConnectAPI)
+    } else {
+      throw new OraklError(OraklErrorCode.GetReporterRequestFailed)
+    }
   }
 }
 
diff --git a/core/src/errors.ts b/core/src/errors.ts
index 864f76ce1..b43ecce6e 100644
--- a/core/src/errors.ts
+++ b/core/src/errors.ts
@@ -72,5 +72,6 @@ export enum OraklErrorCode {
   AxiosBadRequest,
   AxiosCanceledByUser,
   AxiosNotSupported,
-  AxiosInvalidUrl
+  AxiosInvalidUrl,
+  FailedToConnectAPI
 }