diff --git a/.circleci/config.yml b/.circleci/config.yml
index a13ce5f82d..300ddc6518 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -500,7 +500,7 @@ workflows:
       - test-windows:
           name: Windows, Node 12 - Packages, Jest, Acceptance, System tests
           context: nodejs-install
-          node_version: '12.16.2'
+          node_version: '12.21.0'
           jest_tests: true
           acceptance_tests: true
           system_tests: true
@@ -510,7 +510,7 @@ workflows:
       - test-windows:
           name: Windows, Node 12 - "Root" tap tests
           context: nodejs-install
-          node_version: '12.16.2'
+          node_version: '12.21.0'
           root_tap_tests: true
           requires:
             - Regression Test
@@ -552,7 +552,7 @@ workflows:
       - test-linux:
           name: Linux, Node 12 - Packages, Jest, Acceptance, System tests
           context: nodejs-install
-          node_version: '12.16.2'
+          node_version: '12.21.0'
           jest_tests: true
           acceptance_tests: true
           system_tests: true
@@ -562,7 +562,7 @@ workflows:
       - test-linux:
           name: Linux, Node 12 - "Root" tap tests
           context: nodejs-install
-          node_version: '12.16.2'
+          node_version: '12.21.0'
           root_tap_tests: true
           requires:
             - Regression Test
diff --git a/package.json b/package.json
index f11969f5b1..8149de9fde 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "test:acceptance": "tap test/acceptance/**/*.test.* test/acceptance/*.test.* -Rspec --timeout=300 --node-arg=-r --node-arg=ts-node/register",
     "test:acceptance-windows": "tap test/acceptance/**/*.test.* -Rspec --timeout=300 --node-arg=-r --node-arg=ts-node/register",
     "test:system": "tap test/system/*.test.* -Rspec --timeout=300 --node-arg=-r --node-arg=ts-node/register",
-    "test:jest": "jest test/*",
+    "test:jest": "jest --runInBand test/*",
     "test:packages-unit": "jest packages/**/test/unit/*.spec.ts",
     "test:packages-acceptance": "jest packages/**/test/acceptance/*.spec.ts",
     "test:test": "tap test/*.test.* -Rspec --timeout=300 --node-arg=-r --node-arg=ts-node/register",
@@ -131,7 +131,7 @@
   "devDependencies": {
     "@types/agent-base": "^4.2.1",
     "@types/diff": "^3.5.2",
-    "@types/jest": "^25.2.3",
+    "@types/jest": "^26.0.20",
     "@types/lodash": "^4.14.161",
     "@types/needle": "^2.0.4",
     "@types/node": "^10.0.0",
@@ -143,7 +143,7 @@
     "@typescript-eslint/parser": "^2.0.0",
     "eslint": "6.8.0",
     "eslint-config-prettier": "^6.1.0",
-    "jest": "^25.5.4",
+    "jest": "^26.6.3",
     "lodash": "^4.17.20",
     "lodash.countby": "^4.6.0",
     "lodash.every": "^4.6.0",
@@ -157,7 +157,7 @@
     "sinon": "^4.0.0",
     "tap": "^12.6.1",
     "tape": "^4.0.0",
-    "ts-jest": "^25.5.1",
+    "ts-jest": "^26.5.2",
     "ts-node": "^8.0.0",
     "tslint": "^5.14.0",
     "typescript": "^3.4.1"
diff --git a/test/cli-json-file-output.spec.ts b/test/cli-json-file-output.spec.ts
index 28e93b4d1b..25714efe23 100644
--- a/test/cli-json-file-output.spec.ts
+++ b/test/cli-json-file-output.spec.ts
@@ -20,21 +20,18 @@ describe('test --json-file-output ', () => {
   );
   it(
     '`can save JSON output to file while sending human readable output to stdout`',
-    async (done) => {
-      return exec(
-        `node ${main} test ${noVulnsProjectPath} --json-file-output=snyk-direct-json-test-output.json`,
-        async (err, stdout) => {
+    (done) => {
+      const jsonOutputFilename = `${uuidv4()}.json`;
+      exec(
+        `node ${main} test ${noVulnsProjectPath} --json-file-output=${jsonOutputFilename}`,
+        (err, stdout) => {
           if (err) {
             throw err;
           }
-          // give file a little time to be finished to be written
-          await new Promise((r) => setTimeout(r, 5000));
+
           expect(stdout).toMatch('Organization:');
-          const outputFileContents = readFileSync(
-            'snyk-direct-json-test-output.json',
-            'utf-8',
-          );
-          unlinkSync('./snyk-direct-json-test-output.json');
+          const outputFileContents = readFileSync(jsonOutputFilename, 'utf-8');
+          unlinkSync(`./${jsonOutputFilename}`);
           const jsonObj = JSON.parse(outputFileContents);
           const okValue = jsonObj.ok as boolean;
           expect(okValue).toBeTruthy();
@@ -48,8 +45,9 @@ describe('test --json-file-output ', () => {
   it(
     '`test --json-file-output produces same JSON output as normal JSON output to stdout`',
     (done) => {
+      const jsonOutputFilename = `${uuidv4()}.json`;
       return exec(
-        `node ${main} test ${noVulnsProjectPath} --json --json-file-output=snyk-direct-json-test-output.json`,
+        `node ${main} test ${noVulnsProjectPath} --json --json-file-output=${jsonOutputFilename}`,
         async (err, stdout) => {
           if (err) {
             throw err;
@@ -57,11 +55,8 @@ describe('test --json-file-output ', () => {
           // give file a little time to be finished to be written
           await new Promise((r) => setTimeout(r, 3000));
           const stdoutJson = stdout;
-          const outputFileContents = readFileSync(
-            'snyk-direct-json-test-output.json',
-            'utf-8',
-          );
-          unlinkSync('./snyk-direct-json-test-output.json');
+          const outputFileContents = readFileSync(jsonOutputFilename, 'utf-8');
+          unlinkSync(`./${jsonOutputFilename}`);
           expect(stdoutJson).toEqual(outputFileContents);
           done();
         },