diff --git a/web3.js/package-lock.json b/web3.js/package-lock.json
index 7da9470022..4c19194ab3 100644
--- a/web3.js/package-lock.json
+++ b/web3.js/package-lock.json
@@ -4206,6 +4206,12 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "@types/json-schema": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.3.tgz",
+      "integrity": "sha512-Il2DtDVRGDcqjDtE+rF8iqg1CArehSK84HZJCT7AMITlyXRBpuPhqGLDQMowraqqu1coEaimg4ZOqggt6L6L+A==",
+      "dev": true
+    },
     "@types/minimatch": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
@@ -4257,6 +4263,39 @@
       "integrity": "sha512-SOhuU4wNBxhhTHxYaiG5NY4HBhDIDnJF60GU+2LqHAdKKer86//e4yg69aENCtQ04n0ovz+tq2YPME5t5yp4pw==",
       "dev": true
     },
+    "@typescript-eslint/experimental-utils": {
+      "version": "1.13.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-1.13.0.tgz",
+      "integrity": "sha512-zmpS6SyqG4ZF64ffaJ6uah6tWWWgZ8m+c54XXgwFtUv0jNz8aJAVx8chMCvnk7yl6xwn8d+d96+tWp7fXzTuDg==",
+      "dev": true,
+      "requires": {
+        "@types/json-schema": "^7.0.3",
+        "@typescript-eslint/typescript-estree": "1.13.0",
+        "eslint-scope": "^4.0.0"
+      },
+      "dependencies": {
+        "eslint-scope": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-4.0.3.tgz",
+          "integrity": "sha512-p7VutNr1O/QrxysMo3E45FjYDTeXBy0iTltPFNSqKAIfjDSXC+4dj+qfyuD8bfAXrW/y6lW3O76VaYNPKfpKrg==",
+          "dev": true,
+          "requires": {
+            "esrecurse": "^4.1.0",
+            "estraverse": "^4.1.1"
+          }
+        }
+      }
+    },
+    "@typescript-eslint/typescript-estree": {
+      "version": "1.13.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-1.13.0.tgz",
+      "integrity": "sha512-b5rCmd2e6DCC6tCTN9GSUAuxdYwCM/k/2wdjHGrIRGPSJotWMCe/dGpi66u42bhuh8q3QBzqM4TMA1GUUCJvdw==",
+      "dev": true,
+      "requires": {
+        "lodash.unescape": "4.0.1",
+        "semver": "5.5.0"
+      }
+    },
     "JSONStream": {
       "version": "1.3.4",
       "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.4.tgz",
@@ -7636,10 +7675,13 @@
       }
     },
     "eslint-plugin-jest": {
-      "version": "22.7.2",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-22.7.2.tgz",
-      "integrity": "sha512-Aecqe3ulBVI7amgOycVI8ZPL8o0SnGHOf3zn2/Ciu8TXyXDHcjtwD3hOs3ss/Qh/VAwlW/DMcuiXg5btgF+XMA==",
-      "dev": true
+      "version": "22.15.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-22.15.0.tgz",
+      "integrity": "sha512-hgnPbSqAIcLLS9ePb12hNHTRkXnkVaCfOwCt2pzQ8KpOKPWGA4HhLMaFN38NBa/0uvLfrZpcIRjT+6tMAfr58Q==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/experimental-utils": "^1.13.0"
+      }
     },
     "eslint-plugin-prettier": {
       "version": "3.1.0",
@@ -12990,6 +13032,12 @@
       "integrity": "sha1-JMS/zWsvuji/0FlNsRedjptlZWE=",
       "dev": true
     },
+    "lodash.unescape": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/lodash.unescape/-/lodash.unescape-4.0.1.tgz",
+      "integrity": "sha1-vyJJiGzlFM2hEvrpIYzcBlIR/Jw=",
+      "dev": true
+    },
     "lodash.uniq": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/lodash.uniq/-/lodash.uniq-4.5.0.tgz",
diff --git a/web3.js/package.json b/web3.js/package.json
index ce4fc0cbde..3a88a5070b 100644
--- a/web3.js/package.json
+++ b/web3.js/package.json
@@ -103,7 +103,7 @@
     "eslint": "6.1.0",
     "eslint-config-prettier": "^6.0.0",
     "eslint-plugin-import": "2.18.2",
-    "eslint-plugin-jest": "22.7.2",
+    "eslint-plugin-jest": "22.15.0",
     "eslint-plugin-prettier": "^3.0.0",
     "flow-bin": "0.104.0",
     "flow-typed": "2.6.1",
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index 44e7b52f88..fa811e252e 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -540,7 +540,7 @@ export class Connection {
     return res.result;
   }
 
- /**
+  /**
    * Fetch the current slot that the node is processing
    */
   async getSlot(): Promise<number> {
@@ -553,7 +553,6 @@ export class Connection {
     return res.result;
   }
 
-
   /**
    * Fetch the current slot leader of the cluster
    */
diff --git a/web3.js/test/connection.test.js b/web3.js/test/connection.test.js
index 1fde8094e4..e4e810871b 100644
--- a/web3.js/test/connection.test.js
+++ b/web3.js/test/connection.test.js
@@ -39,7 +39,7 @@ test('get account info - error', () => {
     errorResponse,
   ]);
 
-  expect(connection.getAccountInfo(account.publicKey)).rejects.toThrow(
+  return expect(connection.getAccountInfo(account.publicKey)).rejects.toThrow(
     errorMessage,
   );
 });
@@ -152,7 +152,6 @@ test('get slot', async () => {
   }
 });
 
-
 test('get slot leader', async () => {
   const connection = new Connection(url);
 
@@ -222,7 +221,7 @@ test('getEpochVoteAccounts', async () => {
   expect(voteAccounts.length).toBeGreaterThan(0);
 });
 
-test('confirm transaction - error', () => {
+test('confirm transaction - error', async () => {
   const connection = new Connection(url);
 
   const badTransactionSignature = 'bad transaction signature';
@@ -236,7 +235,7 @@ test('confirm transaction - error', () => {
     errorResponse,
   ]);
 
-  expect(
+  await expect(
     connection.confirmTransaction(badTransactionSignature),
   ).rejects.toThrow(errorMessage);
 
@@ -249,7 +248,7 @@ test('confirm transaction - error', () => {
     errorResponse,
   ]);
 
-  expect(
+  await expect(
     connection.getSignatureStatus(badTransactionSignature),
   ).rejects.toThrow(errorMessage);
 });