diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93d36a6fd9d..1c8072af818 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ For notes on migrating to 2.x / 0.200.x see [the upgrade guide](doc/upgrade-to-2
 ### :house: Internal
 
 * perf(sdk-trace-base): use Uint8Array for browser RandomIdGenerator [#6209](https://github.com/open-telemetry/opentelemetry-js/pull/6209) @overbalance
+* test(sdk-trace-base): remove obsolete TypeScript and platform workarounds [#6327](https://github.com/open-telemetry/opentelemetry-js/pull/6327) @overbalance
 
 ## 2.5.0
 
diff --git a/packages/opentelemetry-sdk-trace-base/test/browser/export/BatchSpanProcessor.test.ts b/packages/opentelemetry-sdk-trace-base/test/browser/export/BatchSpanProcessor.test.ts
index db5d6677450..efbe4e91143 100644
--- a/packages/opentelemetry-sdk-trace-base/test/browser/export/BatchSpanProcessor.test.ts
+++ b/packages/opentelemetry-sdk-trace-base/test/browser/export/BatchSpanProcessor.test.ts
@@ -15,6 +15,7 @@
  */
 
 import * as assert from 'assert';
+import { Suite } from 'mocha';
 import * as sinon from 'sinon';
 import { SpanExporter } from '../../../src';
 import { BatchSpanProcessor } from '../../../src/platform/browser/export/BatchSpanProcessor';
@@ -24,18 +25,19 @@ import {
   setGlobalErrorHandler,
 } from '@opentelemetry/core';
 
-/**
- * VisibilityState has been removed from TypeScript 4.6.0+
- * So just defining a simple replacement
- */
-type WebVisibilityState = 'visible' | 'hidden';
+const isBrowser =
+  typeof window !== 'undefined' && typeof document !== 'undefined';
 
-const describeDocument =
-  typeof document === 'object' ? describe : describe.skip;
+function describeBrowser(title: string, fn: (this: Suite) => void) {
+  title = `Browser: ${title}`;
+  if (isBrowser) {
+    return describe(title, fn);
+  }
+  return describe.skip(title, fn);
+}
 
-describeDocument('BatchSpanProcessor - web main context', () => {
-  // TODO: change to DocumentVisibilityState when TypeScript is upgraded to 4.6+
-  let visibilityState: WebVisibilityState = 'visible';
+describeBrowser('BatchSpanProcessor', () => {
+  let visibilityState: DocumentVisibilityState = 'visible';
   let exporter: SpanExporter;
   let processor: BatchSpanProcessor;
   let forceFlushSpy: sinon.SinonStub;
diff --git a/packages/opentelemetry-sdk-trace-base/test/node/export/BatchSpanProcessorBase.test.ts b/packages/opentelemetry-sdk-trace-base/test/node/export/BatchSpanProcessorBase.test.ts
index ec7c935d08d..12a209ce0ad 100644
--- a/packages/opentelemetry-sdk-trace-base/test/node/export/BatchSpanProcessorBase.test.ts
+++ b/packages/opentelemetry-sdk-trace-base/test/node/export/BatchSpanProcessorBase.test.ts
@@ -25,30 +25,21 @@ class BatchSpanProcessor extends BatchSpanProcessorBase<BufferConfig> {
 describe('BatchSpanProcessorBase', () => {
   describe('constructor', () => {
     it('should read defaults from environment', () => {
-      const exporter = new InMemorySpanExporter();
       const bspConfig = {
         OTEL_BSP_MAX_EXPORT_BATCH_SIZE: 256,
         OTEL_BSP_SCHEDULE_DELAY: 2500,
       };
 
-      let env: Record<string, any>;
-      if (global.process?.versions?.node === undefined) {
-        env = globalThis as unknown as Record<string, any>;
-      } else {
-        env = process.env as Record<string, any>;
-      }
+      Object.assign(process.env, bspConfig);
 
-      Object.entries(bspConfig).forEach(([k, v]) => {
-        env[k] = v;
-      });
+      const processor = new BatchSpanProcessor(new InMemorySpanExporter());
 
-      const processor = new BatchSpanProcessor(exporter);
       assert.ok(processor instanceof BatchSpanProcessor);
       assert.strictEqual(processor['_maxExportBatchSize'], 256);
       assert.strictEqual(processor['_scheduledDelayMillis'], 2500);
       processor.shutdown();
 
-      Object.keys(bspConfig).forEach(k => delete env[k]);
+      Object.keys(bspConfig).forEach(k => delete process.env[k]);
     });
   });
 });