diff --git a/tools/webpack-plugin/src/index.ts b/tools/webpack-plugin/src/index.ts
index 995f0b8d..9e0de13c 100644
--- a/tools/webpack-plugin/src/index.ts
+++ b/tools/webpack-plugin/src/index.ts
@@ -1,3 +1,4 @@
 import { BacktracePlugin } from './BacktracePlugin';
 export { BacktracePlugin };
 export default BacktracePlugin;
+export { BacktracePluginOptions } from '@backtrace/sourcemap-tools';
diff --git a/tools/webpack-plugin/tests/__mocks__/TestDebugIdGenerator.ts b/tools/webpack-plugin/tests/__mocks__/TestDebugIdGenerator.ts
deleted file mode 100644
index 0da08676..00000000
--- a/tools/webpack-plugin/tests/__mocks__/TestDebugIdGenerator.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import { DebugIdGenerator, SOURCEMAP_DEBUG_ID_KEY } from '@backtrace/sourcemap-tools';
-
-export class TestDebugIdGenerator implements DebugIdGenerator {
-    public generateSourceSnippet(): string {
-        return `console.log("Source snippet");`;
-    }
-
-    public generateSourceComment(): string {
-        return `//# Source comment`;
-    }
-
-    public addSourceMapKey<T extends object>(sourceMap: T): T & { [SOURCEMAP_DEBUG_ID_KEY]: string } {
-        return {
-            ...sourceMap,
-            [SOURCEMAP_DEBUG_ID_KEY]: 'Source map key',
-        };
-    }
-
-    public static testForSourceSnippet(content: string) {
-        expect(content).toContain(new TestDebugIdGenerator().generateSourceSnippet());
-    }
-
-    public static testForSourceComment(content: string) {
-        expect(content).toContain(new TestDebugIdGenerator().generateSourceComment());
-    }
-
-    public static testForSourceMapKey(sourceMap: object | string) {
-        if (typeof sourceMap === 'string') {
-            sourceMap = JSON.parse(sourceMap);
-        }
-
-        const expected = new TestDebugIdGenerator().addSourceMapKey({});
-        expect(sourceMap).toMatchObject(expected);
-    }
-}
diff --git a/tools/webpack-plugin/tests/e2e/createE2ETest.ts b/tools/webpack-plugin/tests/e2e/createE2ETest.ts
index 242bd4af..1a7f2507 100644
--- a/tools/webpack-plugin/tests/e2e/createE2ETest.ts
+++ b/tools/webpack-plugin/tests/e2e/createE2ETest.ts
@@ -1,8 +1,8 @@
 import { Ok, SourceProcessor, SymbolUploader, ZipArchive } from '@backtrace/sourcemap-tools';
 import assert from 'assert';
 import crypto from 'crypto';
-import fs from 'fs';
 import path from 'path';
+import { Readable } from 'stream';
 import webpack from 'webpack';
 import { asyncWebpack, expectSuccess, getFiles, removeDir, webpackModeTest } from './helpers';
 
@@ -19,9 +19,7 @@ export function createE2ETest(configBuilder: (mode: webpack.Configuration['mode'
         }
 
         function mockProcessor() {
-            return jest
-                .spyOn(SourceProcessor.prototype, 'processSourceAndSourceMapFiles')
-                .mockImplementation(async (_, __, debugId) => Ok({ debugId: debugId ?? 'debugId' } as never));
+            return jest.spyOn(SourceProcessor.prototype, 'processSourceAndSourceMapFiles');
         }
 
         function mockZipArchiveAppend() {
@@ -34,7 +32,7 @@ export function createE2ETest(configBuilder: (mode: webpack.Configuration['mode'
         let zipArchiveAppendSpy: ReturnType<typeof mockZipArchiveAppend>;
 
         beforeAll(async () => {
-            jest.resetAllMocks();
+            jest.restoreAllMocks();
 
             uploadSpy = mockUploader();
             processSpy = mockProcessor();
@@ -50,44 +48,35 @@ export function createE2ETest(configBuilder: (mode: webpack.Configuration['mode'
             result = webpackResult;
         }, 120000);
 
-        it('should call SourceProcessor for every emitted source file and sourcemap pair', async () => {
+        it('should call SourceProcessor for every emitted source file', async () => {
             const outputDir = result.compilation.outputOptions.path;
             assert(outputDir);
 
             const jsFiles = await getFiles(outputDir, /.js$/);
             expect(jsFiles.length).toBeGreaterThan(0);
 
-            const processedPairs = processSpy.mock.calls.map(
-                ([p1, p2]) => [path.resolve(p1), p2 ? path.resolve(p2) : undefined] as const,
-            );
-            for (const file of jsFiles) {
-                const content = await fs.promises.readFile(file, 'utf8');
-                const matches = [...content.matchAll(/^\/\/# sourceMappingURL=(.+)$/gm)];
-                expect(matches.length).toEqual(1);
-                const [, sourceMapPath] = matches[0];
-
-                expect(processedPairs).toContainEqual([
-                    path.resolve(file),
-                    path.resolve(path.dirname(file), sourceMapPath),
-                ]);
-            }
+            const processedFiles = processSpy.mock.calls
+                .map(([sourcePath]) => path.resolve(sourcePath))
+                .sort((a, b) => a.localeCompare(b));
+
+            expect(processedFiles).toEqual(jsFiles.sort((a, b) => a.localeCompare(b)));
         });
 
         it('should append every emitted sourcemap to archive', async () => {
             const outputDir = result.compilation.outputOptions.path;
             assert(outputDir);
 
-            const mapFiles = await getFiles(outputDir, /.js.map$/);
+            const mapFiles = (await getFiles(outputDir, /.js.map$/)).map((f) => path.basename(f));
             expect(mapFiles.length).toBeGreaterThan(0);
 
-            const uploadedFiles = zipArchiveAppendSpy.mock.calls.map((c) => path.resolve(c[1] as string));
+            const uploadedFiles = zipArchiveAppendSpy.mock.calls.map(([name]) => name);
             for (const file of mapFiles) {
-                expect(uploadedFiles).toContain(path.resolve(file));
+                expect(uploadedFiles).toContainEqual(expect.stringContaining(file));
             }
         });
 
         it('should upload archive', async () => {
-            expect(uploadSpy).toBeCalledWith(expect.any(ZipArchive));
+            expect(uploadSpy).toHaveBeenCalledWith(expect.any(Readable));
         });
     });
 }
diff --git a/tools/webpack-plugin/tests/e2e/helpers.ts b/tools/webpack-plugin/tests/e2e/helpers.ts
index f835a954..7e9e14d9 100644
--- a/tools/webpack-plugin/tests/e2e/helpers.ts
+++ b/tools/webpack-plugin/tests/e2e/helpers.ts
@@ -2,7 +2,6 @@ import fs from 'fs';
 import path from 'path';
 import webpack from 'webpack';
 import { BacktracePlugin, BacktracePluginOptions } from '../../src';
-import { TestDebugIdGenerator } from '../__mocks__/TestDebugIdGenerator';
 
 export interface BaseConfigOptions {
     tsconfigPath?: string;
@@ -62,18 +61,6 @@ export function expectSuccess(stats?: webpack.Stats): asserts stats is webpack.S
     }
 }
 
-export async function expectSourceSnippet(content: string) {
-    TestDebugIdGenerator.testForSourceSnippet(content);
-}
-
-export async function expectSourceComment(content: string) {
-    TestDebugIdGenerator.testForSourceComment(content);
-}
-
-export async function expectSourceMapSnippet(content: string) {
-    TestDebugIdGenerator.testForSourceMapKey(content);
-}
-
 export async function getFiles(dir: string, test?: RegExp) {
     const files = (await fs.promises.readdir(dir)).map((f) => path.join(dir, f));
     if (test) {
diff --git a/tools/webpack-plugin/tsconfig.build.json b/tools/webpack-plugin/tsconfig.build.json
index 7993723f..e8bfc757 100644
--- a/tools/webpack-plugin/tsconfig.build.json
+++ b/tools/webpack-plugin/tsconfig.build.json
@@ -2,7 +2,8 @@
     "extends": "./tsconfig.json",
     "compilerOptions": {
         "rootDir": "./src",
-        "outDir": "./lib"
+        "outDir": "./lib",
+        "lib": []
     },
     "exclude": ["node_modules", "tests", "lib"]
 }
diff --git a/tools/webpack-plugin/tsconfig.json b/tools/webpack-plugin/tsconfig.json
index eb7bf768..14d6f934 100644
--- a/tools/webpack-plugin/tsconfig.json
+++ b/tools/webpack-plugin/tsconfig.json
@@ -1,5 +1,8 @@
 {
     "extends": "../../tsconfig.base.json",
+    "compilerOptions": {
+        "lib": ["ES2020"]
+    },
     "references": [
         {
             "path": "../sourcemap-tools/tsconfig.json"