diff --git a/package.json b/package.json
index b9700485..31c248b1 100644
--- a/package.json
+++ b/package.json
@@ -72,6 +72,7 @@
     "@commitlint/config-conventional": "^8.3.4",
     "@mdx-js/mdx": "^1.5.8",
     "@types/babel__code-frame": "^7.0.1",
+    "@types/cross-spawn": "^6.0.2",
     "@types/eslint": "^6.8.0",
     "@types/fs-extra": "^8.1.0",
     "@types/jest": "^25.2.1",
@@ -85,6 +86,7 @@
     "@typescript-eslint/eslint-plugin": "^2.27.0",
     "@typescript-eslint/parser": "^2.27.0",
     "commitlint": "^8.3.5",
+    "cross-spawn": "^7.0.2",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.10.1",
     "eslint-plugin-node": "^11.1.0",
@@ -101,6 +103,7 @@
     "ts-jest": "^25.3.1",
     "ts-loader": "^6.2.2",
     "typescript": "^3.8.3",
+    "unixify": "^1.0.0",
     "vue": "^2.6.11",
     "vue-class-component": "^7.2.3",
     "vue-loader": "^15.9.1",
diff --git a/test/e2e/EsLint.spec.ts b/test/e2e/EsLint.spec.ts
index ccd136ad..f1ae39b0 100644
--- a/test/e2e/EsLint.spec.ts
+++ b/test/e2e/EsLint.spec.ts
@@ -30,18 +30,20 @@ describe('EsLint', () => {
   ])('reports lint error for %p', async ({ async, webpack }) => {
     await sandbox.load(
       await readFixture(join(__dirname, 'fixtures/eslint-basic.fixture'), {
-        FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION,
-        TS_LOADER_VERSION: '^5.0.0',
-        TYPESCRIPT_VERSION: '~3.8.0',
-        WEBPACK_VERSION: webpack,
-        WEBPACK_CLI_VERSION,
-        WEBPACK_DEV_SERVER_VERSION,
-        ASYNC: async ? 'true' : 'false',
+        FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
+          FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION
+        ),
+        TS_LOADER_VERSION: JSON.stringify('^5.0.0'),
+        TYPESCRIPT_VERSION: JSON.stringify('~3.8.0'),
+        WEBPACK_VERSION: JSON.stringify(webpack),
+        WEBPACK_CLI_VERSION: JSON.stringify(WEBPACK_CLI_VERSION),
+        WEBPACK_DEV_SERVER_VERSION: JSON.stringify(WEBPACK_DEV_SERVER_VERSION),
+        ASYNC: JSON.stringify(async),
       })
     );
 
     const driver = createWebpackDevServerDriver(
-      sandbox.spawn('yarn exec webpack-dev-server'),
+      sandbox.spawn('./node_modules/.bin/webpack-dev-server'),
       async
     );
     let errors: string[];
diff --git a/test/e2e/PluginOutOfMemory.spec.ts b/test/e2e/PluginOutOfMemory.spec.ts
index 21bb6b5a..c176942d 100644
--- a/test/e2e/PluginOutOfMemory.spec.ts
+++ b/test/e2e/PluginOutOfMemory.spec.ts
@@ -26,13 +26,15 @@ describe('ForkTsCheckerWebpackPlugin Out Of Memory', () => {
   ])('handles out of memory for %p', async ({ async, webpack }) => {
     await sandbox.load(
       await readFixture(join(__dirname, 'fixtures/typescript-basic.fixture'), {
-        FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION,
-        TS_LOADER_VERSION: '^5.0.0',
-        TYPESCRIPT_VERSION: '~3.8.0',
-        WEBPACK_VERSION: webpack,
-        WEBPACK_CLI_VERSION: '^3.3.11',
-        WEBPACK_DEV_SERVER_VERSION: '^3.10.3',
-        ASYNC: async ? 'true' : 'false',
+        FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
+          FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION
+        ),
+        TS_LOADER_VERSION: JSON.stringify('^5.0.0'),
+        TYPESCRIPT_VERSION: JSON.stringify('~3.8.0'),
+        WEBPACK_VERSION: JSON.stringify(webpack),
+        WEBPACK_CLI_VERSION: JSON.stringify('^3.3.11'),
+        WEBPACK_DEV_SERVER_VERSION: JSON.stringify('^3.10.3'),
+        ASYNC: JSON.stringify(async),
       })
     );
 
@@ -48,7 +50,9 @@ describe('ForkTsCheckerWebpackPlugin Out Of Memory', () => {
       ].join('\n')
     );
 
-    const driver = createGenericProcessDriver(sandbox.spawn('yarn exec webpack-dev-server'));
+    const driver = createGenericProcessDriver(
+      sandbox.spawn('./node_modules/.bin/webpack-dev-server')
+    );
 
     // we should see an error message about out of memory
     await driver.waitForStderrIncludes(
diff --git a/test/e2e/TypeScriptSolutionBuilderApi.spec.ts b/test/e2e/TypeScriptSolutionBuilderApi.spec.ts
index 8e5e1e56..45e18d6c 100644
--- a/test/e2e/TypeScriptSolutionBuilderApi.spec.ts
+++ b/test/e2e/TypeScriptSolutionBuilderApi.spec.ts
@@ -28,18 +28,20 @@ describe('TypeScript SolutionBuilder API', () => {
       async ({ async }) => {
         await sandbox.load(
           await readFixture(join(__dirname, 'fixtures/typescript-project-references.fixture'), {
-            FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION,
-            TS_LOADER_VERSION: '^7.0.1',
-            TYPESCRIPT_VERSION: '~3.8.0',
-            WEBPACK_VERSION: '^4.0.0',
-            WEBPACK_CLI_VERSION,
-            WEBPACK_DEV_SERVER_VERSION,
-            ASYNC: async ? 'true' : 'false',
+            FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
+              FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION
+            ),
+            TS_LOADER_VERSION: JSON.stringify('^7.0.1'),
+            TYPESCRIPT_VERSION: JSON.stringify('~3.8.0'),
+            WEBPACK_VERSION: JSON.stringify('^4.0.0'),
+            WEBPACK_CLI_VERSION: JSON.stringify(WEBPACK_CLI_VERSION),
+            WEBPACK_DEV_SERVER_VERSION: JSON.stringify(WEBPACK_DEV_SERVER_VERSION),
+            ASYNC: JSON.stringify(async),
           })
         );
 
         const driver = createWebpackDevServerDriver(
-          sandbox.spawn('yarn exec webpack-dev-server'),
+          sandbox.spawn('./node_modules/.bin/webpack-dev-server'),
           async
         );
         let errors: string[];
diff --git a/test/e2e/TypeScriptWatchApi.spec.ts b/test/e2e/TypeScriptWatchApi.spec.ts
index 5ccfebda..1a0fdd0c 100644
--- a/test/e2e/TypeScriptWatchApi.spec.ts
+++ b/test/e2e/TypeScriptWatchApi.spec.ts
@@ -33,13 +33,15 @@ describe('TypeScript Watch API', () => {
       async ({ async, webpack }) => {
         await sandbox.load(
           await readFixture(join(__dirname, 'fixtures/typescript-basic.fixture'), {
-            FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION,
-            TS_LOADER_VERSION: '^5.0.0',
-            TYPESCRIPT_VERSION: '~3.8.0',
-            WEBPACK_VERSION: webpack,
-            WEBPACK_CLI_VERSION,
-            WEBPACK_DEV_SERVER_VERSION,
-            ASYNC: async ? 'true' : 'false',
+            FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
+              FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION
+            ),
+            TS_LOADER_VERSION: JSON.stringify('^5.0.0'),
+            TYPESCRIPT_VERSION: JSON.stringify('~3.8.0'),
+            WEBPACK_VERSION: JSON.stringify(webpack),
+            WEBPACK_CLI_VERSION: JSON.stringify(WEBPACK_CLI_VERSION),
+            WEBPACK_DEV_SERVER_VERSION: JSON.stringify(WEBPACK_DEV_SERVER_VERSION),
+            ASYNC: JSON.stringify(async),
           })
         );
 
@@ -52,7 +54,7 @@ describe('TypeScript Watch API', () => {
         );
 
         const driver = createWebpackDevServerDriver(
-          sandbox.spawn('yarn exec webpack-dev-server'),
+          sandbox.spawn('./node_modules/.bin/webpack-dev-server'),
           async
         );
         let errors: string[];
@@ -155,18 +157,20 @@ describe('TypeScript Watch API', () => {
     ])('reports semantic error for %p', async ({ async, webpack, typescript, tsloader }) => {
       await sandbox.load(
         await readFixture(join(__dirname, 'fixtures/typescript-basic.fixture'), {
-          FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION,
-          TS_LOADER_VERSION: tsloader,
-          TYPESCRIPT_VERSION: typescript,
-          WEBPACK_VERSION: webpack,
-          WEBPACK_CLI_VERSION,
-          WEBPACK_DEV_SERVER_VERSION,
-          ASYNC: async ? 'true' : 'false',
+          FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
+            FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION
+          ),
+          TS_LOADER_VERSION: JSON.stringify(tsloader),
+          TYPESCRIPT_VERSION: JSON.stringify(typescript),
+          WEBPACK_VERSION: JSON.stringify(webpack),
+          WEBPACK_CLI_VERSION: JSON.stringify(WEBPACK_CLI_VERSION),
+          WEBPACK_DEV_SERVER_VERSION: JSON.stringify(WEBPACK_DEV_SERVER_VERSION),
+          ASYNC: JSON.stringify(async),
         })
       );
 
       const driver = createWebpackDevServerDriver(
-        sandbox.spawn('yarn exec webpack-dev-server'),
+        sandbox.spawn('./node_modules/.bin/webpack-dev-server'),
         async
       );
       let errors: string[];
diff --git a/test/e2e/fixtures/eslint-basic.fixture b/test/e2e/fixtures/eslint-basic.fixture
index 366cae2f..137ac822 100644
--- a/test/e2e/fixtures/eslint-basic.fixture
+++ b/test/e2e/fixtures/eslint-basic.fixture
@@ -9,12 +9,12 @@
     "@typescript-eslint/eslint-plugin": "^2.27.0",
     "@typescript-eslint/parser": "^2.27.0",
     "eslint": "^6.8.0",
-    "fork-ts-checker-webpack-plugin": "${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION}",
-    "ts-loader": "${TS_LOADER_VERSION}",
-    "typescript": "${TYPESCRIPT_VERSION}",
-    "webpack": "${WEBPACK_VERSION}",
-    "webpack-cli": "${WEBPACK_CLI_VERSION}",
-    "webpack-dev-server": "${WEBPACK_DEV_SERVER_VERSION}"
+    "fork-ts-checker-webpack-plugin": ${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION},
+    "ts-loader": ${TS_LOADER_VERSION},
+    "typescript": ${TYPESCRIPT_VERSION},
+    "webpack": ${WEBPACK_VERSION},
+    "webpack-cli": ${WEBPACK_CLI_VERSION},
+    "webpack-dev-server": ${WEBPACK_DEV_SERVER_VERSION}
   }
 }
 /// tsconfig.json
diff --git a/test/e2e/fixtures/typescript-basic.fixture b/test/e2e/fixtures/typescript-basic.fixture
index d1f79dc6..fd89fcc3 100644
--- a/test/e2e/fixtures/typescript-basic.fixture
+++ b/test/e2e/fixtures/typescript-basic.fixture
@@ -5,12 +5,12 @@
   "main": "dist/index.js",
   "license": "MIT",
   "devDependencies": {
-    "fork-ts-checker-webpack-plugin": "${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION}",
-    "ts-loader": "${TS_LOADER_VERSION}",
-    "typescript": "${TYPESCRIPT_VERSION}",
-    "webpack": "${WEBPACK_VERSION}",
-    "webpack-cli": "${WEBPACK_CLI_VERSION}",
-    "webpack-dev-server": "${WEBPACK_DEV_SERVER_VERSION}"
+    "fork-ts-checker-webpack-plugin": ${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION},
+    "ts-loader": ${TS_LOADER_VERSION},
+    "typescript": ${TYPESCRIPT_VERSION},
+    "webpack": ${WEBPACK_VERSION},
+    "webpack-cli": ${WEBPACK_CLI_VERSION},
+    "webpack-dev-server": ${WEBPACK_DEV_SERVER_VERSION}
   }
 }
 /// tsconfig.json
diff --git a/test/e2e/fixtures/typescript-project-references.fixture b/test/e2e/fixtures/typescript-project-references.fixture
index 3837b273..1fbc1f97 100644
--- a/test/e2e/fixtures/typescript-project-references.fixture
+++ b/test/e2e/fixtures/typescript-project-references.fixture
@@ -8,12 +8,12 @@
     "packages/*"
   ],
   "devDependencies": {
-    "fork-ts-checker-webpack-plugin": "${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION}",
-    "ts-loader": "${TS_LOADER_VERSION}",
-    "typescript": "${TYPESCRIPT_VERSION}",
-    "webpack": "${WEBPACK_VERSION}",
-    "webpack-cli": "${WEBPACK_CLI_VERSION}",
-    "webpack-dev-server": "${WEBPACK_DEV_SERVER_VERSION}"
+    "fork-ts-checker-webpack-plugin": ${FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION},
+    "ts-loader": ${TS_LOADER_VERSION},
+    "typescript": ${TYPESCRIPT_VERSION},
+    "webpack": ${WEBPACK_VERSION},
+    "webpack-cli": ${WEBPACK_CLI_VERSION},
+    "webpack-dev-server": ${WEBPACK_DEV_SERVER_VERSION}
   }
 }
 
diff --git a/test/e2e/sandbox/Sandbox.ts b/test/e2e/sandbox/Sandbox.ts
index d0d299fc..9e252525 100644
--- a/test/e2e/sandbox/Sandbox.ts
+++ b/test/e2e/sandbox/Sandbox.ts
@@ -2,7 +2,8 @@ import { join, resolve, dirname } from 'path';
 import fs from 'fs-extra';
 import os from 'os';
 import chalk from 'chalk';
-import { exec, spawn, ChildProcess } from 'child_process';
+import { exec, ChildProcess } from 'child_process';
+import spawn from 'cross-spawn';
 import { Fixture } from './Fixture';
 import stripAnsi from 'strip-ansi';
 
diff --git a/test/unit/formatter/WebpackFormatter.spec.ts b/test/unit/formatter/WebpackFormatter.spec.ts
index cba6998a..20718426 100644
--- a/test/unit/formatter/WebpackFormatter.spec.ts
+++ b/test/unit/formatter/WebpackFormatter.spec.ts
@@ -1,5 +1,5 @@
 import os from 'os';
-import { join } from 'path';
+import { join, sep } from 'path';
 import { Issue } from 'lib/issue';
 import { createBasicFormatter, createWebpackFormatter, Formatter } from 'lib/formatter';
 
@@ -38,7 +38,7 @@ describe('formatter/WebpackFormatter', () => {
   });
 
   it('formats issue file', () => {
-    expect(formatter(issue)).toContain('some/file.ts');
+    expect(formatter(issue)).toContain(`some${sep}file.ts`);
   });
 
   it('formats location', () => {
@@ -53,7 +53,7 @@ describe('formatter/WebpackFormatter', () => {
 
   it('formats issue header like webpack', () => {
     expect(formatter(issue)).toEqual(
-      ['ERROR in some/file.ts 1:7-16', 'TS123: Some issue content', ''].join(os.EOL)
+      [`ERROR in some${sep}file.ts 1:7-16`, 'TS123: Some issue content', ''].join(os.EOL)
     );
   });
 });
diff --git a/test/unit/typescript-reporter/TypeScriptReporterConfiguration.spec.ts b/test/unit/typescript-reporter/TypeScriptReporterConfiguration.spec.ts
index 0d595d76..ebe14518 100644
--- a/test/unit/typescript-reporter/TypeScriptReporterConfiguration.spec.ts
+++ b/test/unit/typescript-reporter/TypeScriptReporterConfiguration.spec.ts
@@ -1,4 +1,5 @@
 import webpack from 'webpack';
+import unixify from 'unixify';
 import { TypeScriptReporterConfiguration } from 'lib/typescript-reporter/TypeScriptReporterConfiguration';
 import { TypeScriptReporterOptions } from 'lib/typescript-reporter/TypeScriptReporterOptions';
 
@@ -87,7 +88,9 @@ describe('typescript-reporter/TypeScriptsReporterConfiguration', () => {
       options as TypeScriptReporterOptions
     );
 
-    expect(configuration).toEqual(expectedConfiguration);
+    expect({ ...configuration, tsconfig: unixify(configuration.tsconfig) }).toEqual(
+      expectedConfiguration
+    );
   });
 
   it('passes vue options to the vue extension', async () => {
diff --git a/yarn.lock b/yarn.lock
index b1155a9b..9c8e32ac 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -884,6 +884,13 @@
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
   integrity sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==
 
+"@types/cross-spawn@^6.0.2":
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/@types/cross-spawn/-/cross-spawn-6.0.2.tgz#168309de311cd30a2b8ae720de6475c2fbf33ac7"
+  integrity sha512-KuwNhp3eza+Rhu8IFI5HUXRP0LIhqH5cAjubUvGXXthh4YYBuP2ntwEX+Cz8GJoZUHlKo247wPWOfA9LYEq4cw==
+  dependencies:
+    "@types/node" "*"
+
 "@types/eslint-visitor-keys@^1.0.0":
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/@types/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#1ee30d79544ca84d68d4b3cdb0af4f205663dd2d"
@@ -2369,7 +2376,7 @@ cross-spawn@^6.0.0, cross-spawn@^6.0.5:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
-cross-spawn@^7.0.0:
+cross-spawn@^7.0.0, cross-spawn@^7.0.2:
   version "7.0.2"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-7.0.2.tgz#d0d7dcfa74e89115c7619f4f721a94e1fdb716d6"
   integrity sha512-PD6G8QG3S4FK/XCGFbEQrDqO2AnMMsy0meR7lerlIOHAAbkuavGU/pOqprrlvfTNjvowivTeBsjebAL0NSoMxw==
@@ -7188,6 +7195,13 @@ universalify@^1.0.0:
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-1.0.0.tgz#b61a1da173e8435b2fe3c67d29b9adf8594bd16d"
   integrity sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug==
 
+unixify@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unixify/-/unixify-1.0.0.tgz#3a641c8c2ffbce4da683a5c70f03a462940c2090"
+  integrity sha1-OmQcjC/7zk2mg6XHDwOkYpQMIJA=
+  dependencies:
+    normalize-path "^2.1.1"
+
 unset-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"