diff --git a/packages/opentelemetry-plugin-mongodb-core/package.json b/packages/opentelemetry-plugin-mongodb-core/package.json
index f54d725add..6744a3c994 100644
--- a/packages/opentelemetry-plugin-mongodb-core/package.json
+++ b/packages/opentelemetry-plugin-mongodb-core/package.json
@@ -8,6 +8,7 @@
   "repository": "open-telemetry/opentelemetry-js",
   "scripts": {
     "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.ts'",
+    "codecov": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../",
     "tdd": "yarn test -- --watch-extensions ts --watch",
     "clean": "rimraf build/*",
     "check": "gts check",
@@ -40,8 +41,8 @@
     "access": "public"
   },
   "devDependencies": {
-    "@opentelemetry/node": "^0.1.1",
-    "@opentelemetry/tracing": "^0.1.1",
+    "@opentelemetry/node": "^0.2.0",
+    "@opentelemetry/tracing": "^0.2.0",
     "@types/mocha": "^5.2.7",
     "@types/mongodb": "^3.2.3",
     "@types/node": "^12.7.2",
diff --git a/packages/opentelemetry-plugin-mongodb-core/src/mongodb.ts b/packages/opentelemetry-plugin-mongodb-core/src/mongodb.ts
index 7300556e1f..0c2afbbf3f 100644
--- a/packages/opentelemetry-plugin-mongodb-core/src/mongodb.ts
+++ b/packages/opentelemetry-plugin-mongodb-core/src/mongodb.ts
@@ -106,7 +106,7 @@ export class MongoDBCorePlugin extends BasePlugin<typeof mongodb> {
         const resultHandler =
           typeof options === 'function' ? options : callback;
         if (
-          currentSpan === null ||
+          currentSpan === undefined ||
           typeof resultHandler !== 'function' ||
           typeof commands !== 'object'
         ) {
@@ -208,7 +208,7 @@ export class MongoDBCorePlugin extends BasePlugin<typeof mongodb> {
       ): mongodb.Cursor {
         const currentSpan = plugin._tracer.getCurrentSpan();
         const resultHandler = args[0];
-        if (currentSpan === null || typeof resultHandler !== 'function') {
+        if (currentSpan === undefined || typeof resultHandler !== 'function') {
           return original.apply(this, args);
         }
         const span = plugin._tracer.startSpan(`mongodb.query`, {
diff --git a/packages/opentelemetry-scope-async-hooks/src/AsyncHooksScopeManager.ts b/packages/opentelemetry-scope-async-hooks/src/AsyncHooksScopeManager.ts
index a8a5b1f13d..f3f4ee7f78 100644
--- a/packages/opentelemetry-scope-async-hooks/src/AsyncHooksScopeManager.ts
+++ b/packages/opentelemetry-scope-async-hooks/src/AsyncHooksScopeManager.ts
@@ -50,7 +50,7 @@ export class AsyncHooksScopeManager implements ScopeManager {
   }
 
   active(): unknown {
-    return this._scopes[asyncHooks.executionAsyncId()] || null;
+    return this._scopes[asyncHooks.executionAsyncId()] || undefined;
   }
 
   with<T extends (...args: unknown[]) => ReturnType<T>>(
diff --git a/packages/opentelemetry-scope-async-hooks/test/AsyncHooksScopeManager.test.ts b/packages/opentelemetry-scope-async-hooks/test/AsyncHooksScopeManager.test.ts
index fa6d85cef8..c5333786f4 100644
--- a/packages/opentelemetry-scope-async-hooks/test/AsyncHooksScopeManager.test.ts
+++ b/packages/opentelemetry-scope-async-hooks/test/AsyncHooksScopeManager.test.ts
@@ -135,7 +135,7 @@ describe('AsyncHooksScopeManager', () => {
         setTimeout(() => {
           assert.strictEqual(
             scopeManager.active(),
-            null,
+            undefined,
             'should have no scope'
           );
           return done();
@@ -228,7 +228,7 @@ describe('AsyncHooksScopeManager', () => {
       const patchedEe = scopeManager.bind(ee, scope);
       const handler = () => {
         setImmediate(() => {
-          assert.deepStrictEqual(scopeManager.active(), null);
+          assert.deepStrictEqual(scopeManager.active(), undefined);
           patchedEe.removeAllListeners('test');
           assert.strictEqual(patchedEe.listeners('test').length, 0);
           return done();
diff --git a/packages/opentelemetry-scope-base/src/NoopScopeManager.ts b/packages/opentelemetry-scope-base/src/NoopScopeManager.ts
index 348e84cd50..ac32db311f 100644
--- a/packages/opentelemetry-scope-base/src/NoopScopeManager.ts
+++ b/packages/opentelemetry-scope-base/src/NoopScopeManager.ts
@@ -18,7 +18,7 @@ import * as types from './types';
 
 export class NoopScopeManager implements types.ScopeManager {
   active(): unknown {
-    return null;
+    return undefined;
   }
 
   with<T extends (...args: unknown[]) => ReturnType<T>>(
diff --git a/packages/opentelemetry-scope-base/test/NoopScopeManager.test.ts b/packages/opentelemetry-scope-base/test/NoopScopeManager.test.ts
index 735a578cfc..4767f5793f 100644
--- a/packages/opentelemetry-scope-base/test/NoopScopeManager.test.ts
+++ b/packages/opentelemetry-scope-base/test/NoopScopeManager.test.ts
@@ -48,7 +48,7 @@ describe('NoopScopeManager', () => {
       scopeManager.with(test, () => {
         assert.strictEqual(
           scopeManager.active(),
-          null,
+          undefined,
           'should not have scope'
         );
         return done();
@@ -66,12 +66,20 @@ describe('NoopScopeManager', () => {
 
   describe('.active()', () => {
     it('should always return null (when enabled)', () => {
-      assert.strictEqual(scopeManager.active(), null, 'should not have scope');
+      assert.strictEqual(
+        scopeManager.active(),
+        undefined,
+        'should not have scope'
+      );
     });
 
     it('should always return null (when disabled)', () => {
       scopeManager.disable();
-      assert.strictEqual(scopeManager.active(), null, 'should not have scope');
+      assert.strictEqual(
+        scopeManager.active(),
+        undefined,
+        'should not have scope'
+      );
       scopeManager.enable();
     });
   });