diff --git a/src/index.js b/src/index.js
index db75312..68092ba 100644
--- a/src/index.js
+++ b/src/index.js
@@ -7,30 +7,6 @@ import WebWorkerTemplatePlugin from 'webpack/lib/webworker/WebWorkerTemplatePlug
 
 export default function loader() {}
 
-const CACHE = {};
-const tapName = 'workerize-loader';
-
-function compilationHook(compiler, handler) {
-	if (compiler.hooks) {
-		return compiler.hooks.compilation.tap(tapName, handler);
-	}
-	return compiler.plugin('compilation', handler);
-}
-
-function parseHook(data, handler) {
-	if (data.normalModuleFactory.hooks) {
-		return data.normalModuleFactory.hooks.parser.for('javascript/auto').tap(tapName, handler);
-	}
-	return data.normalModuleFactory.plugin('parser', handler);
-}
-
-function exportDeclarationHook(parser, handler) {
-	if (parser.hooks) {
-		return parser.hooks.exportDeclaration.tap(tapName, handler);
-	}
-	return parser.plugin('export declaration', handler);
-}
-
 loader.pitch = function(request) {
 	this.cacheable(false);
 
@@ -84,51 +60,20 @@ loader.pitch = function(request) {
 	}
 
 	(new SingleEntryPlugin(this.context, `!!${path.resolve(__dirname, 'rpc-worker-loader.js')}!${request}`, 'main')).apply(worker.compiler);
-
-	const subCache = `subcache ${__dirname} ${request}`;
-
-	compilationHook(worker.compiler, (compilation, data) => {
-		if (compilation.cache) {
-			if (!compilation.cache[subCache]) compilation.cache[subCache] = {};
-
-			compilation.cache = compilation.cache[subCache];
-		}
-		parseHook(data, (parser, options) => {
-			exportDeclarationHook(parser, expr => {
-				let decl = expr.declaration || expr,
-					{ compilation, current } = parser.state,
-					entry = compilation.entries[0].resource;
-
-				// only process entry exports
-				if (current.resource!==entry) return;
-
-				let key = current.nameForCondition();
-				let exports = CACHE[key] || (CACHE[key] = {});
-
-				if (decl.id) {
-					exports[decl.id.name] = true;
-				}
-				else if (decl.declarations) {
-					for (let i=0; i<decl.declarations.length; i++) {
-						exports[decl.declarations[i].id.name] = true;
-					}
-				}
-				else {
-					console.warn('[workerize] unknown export declaration: ', expr);
-				}
-			});
-		});
-	});
-
 	worker.compiler.runAsChild((err, entries, compilation) => {
 		if (err) return cb(err);
 
 		if (entries[0]) {
-			worker.file = entries[0].files[0];
+			worker.file = Array.from(entries[0].files)[0];
 
-			let key = entries[0].entryModule.nameForCondition();
 			let contents = compilation.assets[worker.file].source();
-			let exports = Object.keys(CACHE[key] || {});
+
+			if (entries[0].entryModule.buildMeta.providedExports === true) {
+				// Can also occur if doing `export * from 'common js module'`
+				throw new Error('Attempted to load a worker implemented in CommonJS');
+			}
+
+			let exports = entries[0].entryModule.buildMeta.providedExports;
 
 			// console.log('Workerized exports: ', exports.join(', '));
 
diff --git a/test/src/and-the-other.js b/test/src/and-the-other.js
new file mode 100644
index 0000000..c9ece14
--- /dev/null
+++ b/test/src/and-the-other.js
@@ -0,0 +1,9 @@
+export function otherOtherFoo() {
+	return 2;
+}
+
+export function anyFoo() {
+	return 4;
+}
+
+export const otherOtherBar = 3;
diff --git a/test/src/common.js b/test/src/common.js
new file mode 100644
index 0000000..c7b6a1f
--- /dev/null
+++ b/test/src/common.js
@@ -0,0 +1,3 @@
+exports.tragedy = function tragedy() {
+	return 'common';
+};
diff --git a/test/src/index.test.js b/test/src/index.test.js
index 0b1bfc8..35d201b 100644
--- a/test/src/index.test.js
+++ b/test/src/index.test.js
@@ -8,6 +8,7 @@ describe('worker', () => {
 
 	it('should be an instance of Worker', () => {
 		worker = new Worker();
+		// eslint-disable-next-line jest/no-jasmine-globals
 		expect(worker).toEqual(jasmine.any(window.Worker));
 	});
 
@@ -15,6 +16,25 @@ describe('worker', () => {
 		expect(await worker.foo()).toBe(1);
 	});
 
+	it('worker.otherFoo()', async () => {
+		expect(await worker.otherFoo()).toBe(-1);
+	});
+
+	it('worker.otherOtherFoo()', async () => {
+		expect(await worker.otherOtherFoo()).toBe(2);
+	});
+	it('worker.andTheOtherFoo()', async () => {
+		expect(await worker.andTheOtherFoo()).toBe(2);
+	});
+
+	it('worker.anyFoo()', async () => {
+		expect(await worker.anyFoo()).toBe(4);
+	});
+
+	it('worker.tragedy()', async () => {
+		expect(await worker.tragedy()).toBe('common');
+	});
+
 	it('worker.bar()', async () => {
 		let out = await worker.bar('a', 'b');
 		expect(out).toEqual('a [bar:3] b');
@@ -102,6 +122,7 @@ describe('?import option', () => {
 
 	it('should be an instance of Worker', () => {
 		worker = new ImportWorker();
+		// eslint-disable-next-line jest/no-jasmine-globals
 		expect(worker).toEqual(jasmine.any(window.Worker));
 	});
 
diff --git a/test/src/other.js b/test/src/other.js
index f4fbc35..8a2402b 100644
--- a/test/src/other.js
+++ b/test/src/other.js
@@ -1,3 +1,5 @@
-export function otherFoo() {}
+export function otherFoo() {
+	return -1;
+}
 
-export const otherBar = 3;
\ No newline at end of file
+export const otherBar = 3;
diff --git a/test/src/worker.js b/test/src/worker.js
index 73b1049..1751c3c 100644
--- a/test/src/worker.js
+++ b/test/src/worker.js
@@ -1,11 +1,17 @@
 import { otherFoo, otherBar } from './other';
 
 export { otherFoo };
+export { otherOtherFoo as andTheOtherFoo } from './and-the-other';
+export * from './and-the-other';
+
+export { tragedy } from './common.js';
 
 export function foo() {
 	return 1;
 }
 
+export const value = 3;
+
 export function throwError() {
 	throw new Error('Error in worker.js');
 }