diff --git a/packages/opentelemetry-resources/src/platform/node/detectors/ProcessDetector.ts b/packages/opentelemetry-resources/src/platform/node/detectors/ProcessDetector.ts
index ba8ee52fd3..90a1851490 100644
--- a/packages/opentelemetry-resources/src/platform/node/detectors/ProcessDetector.ts
+++ b/packages/opentelemetry-resources/src/platform/node/detectors/ProcessDetector.ts
@@ -29,7 +29,7 @@ import { ResourceAttributes } from '../../../types';
 class ProcessDetector implements Detector {
   async detect(config: ResourceDetectionConfigWithLogger): Promise<Resource> {
     const processResource: ResourceAttributes = {
-      [PROCESS_RESOURCE.PID]: process.pid || '',
+      [PROCESS_RESOURCE.PID]: process.pid,
       [PROCESS_RESOURCE.NAME]: process.title || '',
       [PROCESS_RESOURCE.COMMAND]: process.argv[1] || '',
       [PROCESS_RESOURCE.COMMAND_LINE]: process.argv.join(' ') || '',
@@ -47,7 +47,7 @@ class ProcessDetector implements Detector {
     processResource: ResourceAttributes,
     config: ResourceDetectionConfigWithLogger
   ) {
-    if (processResource[PROCESS_RESOURCE.PID] === '') {
+    if (processResource[PROCESS_RESOURCE.PID] === undefined) {
       config.logger.debug(
         'ProcessDetector failed: unable to locate pid for currently running process'
       );
diff --git a/packages/opentelemetry-resources/test/detectors/ProcessDetector.test.ts b/packages/opentelemetry-resources/test/detectors/ProcessDetector.test.ts
index ab235bba3f..96a80ce43b 100644
--- a/packages/opentelemetry-resources/test/detectors/ProcessDetector.test.ts
+++ b/packages/opentelemetry-resources/test/detectors/ProcessDetector.test.ts
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+import * as sinon from 'sinon';
 import { processDetector, Resource } from '../../src';
 import {
   assertProcessResource,
@@ -22,16 +22,23 @@ import {
 import { NoopLogger } from '@opentelemetry/core';
 
 describe('processDetector()', () => {
+  let sandbox: sinon.SinonSandbox;
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox();
+  });
+
+  afterEach(() => {
+    sandbox.restore();
+  });
+
   it('should return resource information from process', async () => {
-    Object.defineProperty(process, 'pid', {
-      value: 1234,
-    });
-    Object.defineProperty(process, 'title', {
-      value: 'otProcess',
-    });
-    Object.defineProperty(process, 'argv', {
-      value: ['/tmp/node', '/home/ot/test.js', 'arg1', 'arg2'],
-    });
+    sandbox.stub(process, 'pid').value(1234);
+    sandbox.stub(process, 'title').value('otProcess');
+    sandbox
+      .stub(process, 'argv')
+      .value(['/tmp/node', '/home/ot/test.js', 'arg1', 'arg2']);
+
     const resource: Resource = await processDetector.detect({
       logger: new NoopLogger(),
     });
@@ -43,30 +50,21 @@ describe('processDetector()', () => {
     });
   });
   it('should return empty resources if title, command and commondLine is missing', async () => {
-    Object.defineProperty(process, 'pid', {
-      value: 1234,
-    });
-    Object.defineProperty(process, 'title', {
-      value: undefined,
-    });
-    Object.defineProperty(process, 'argv', {
-      value: [],
-    });
+    sandbox.stub(process, 'pid').value(1234);
+    sandbox.stub(process, 'title').value(undefined);
+    sandbox.stub(process, 'argv').value([]);
     const resource: Resource = await processDetector.detect({
       logger: new NoopLogger(),
     });
     assertEmptyResource(resource);
   });
   it('should return empty resources if pid is missing', async () => {
-    Object.defineProperty(process, 'pid', {
-      value: undefined,
-    });
-    Object.defineProperty(process, 'title', {
-      value: 'otProcess',
-    });
-    Object.defineProperty(process, 'argv', {
-      value: ['/tmp/node', '/home/ot/test.js', 'arg1', 'arg2'],
-    });
+    sandbox.stub(process, 'pid').value(undefined);
+    sandbox.stub(process, 'title').value('otProcess');
+    sandbox
+      .stub(process, 'argv')
+      .value(['/tmp/node', '/home/ot/test.js', 'arg1', 'arg2']);
+
     const resource: Resource = await processDetector.detect({
       logger: new NoopLogger(),
     });