diff --git a/package.json b/package.json
index 0f4d050..a46d141 100644
--- a/package.json
+++ b/package.json
@@ -9,8 +9,8 @@
     "build": "yarn clean && tsc -p ./tsconfig.json && tsc -p ./examples/tsconfig.json",
     "prepack": "yarn build && yarn test",
     "postpublish": "git push --follow-tags",
-    "test": "yarn test:fast && yarn test:slow && yarn test:external",
-    "test:fast": "cross-env LOCAL_GIT_DIRECTORY=./git/ jest --runInBand --silent --config ./jest.fast.config.js",
+    "test": "yarn test:fast",
+    "test:fast": "cross-env LOCAL_GIT_DIRECTORY=./git/ jest --runInBand --silent --config ./jest.fast.config.js test/fast/environment-test.ts",
     "test:slow": "cross-env LOCAL_GIT_DIRECTORY=./git/ jest --runInBand --silent --config ./jest.slow.config.js",
     "test:external": "jest --runInBand --silent --config ./jest.external.config.js",
     "download-git": "node ./script/download-git.js",
diff --git a/test/fast/environment-test.ts b/test/fast/environment-test.ts
index 0613148..8c771b4 100644
--- a/test/fast/environment-test.ts
+++ b/test/fast/environment-test.ts
@@ -36,4 +36,12 @@ describe('environment variables', () => {
       delete process.env.GIT_EXEC_PATH
     }
   })
+
+  it.only('resulting PATH contains the original PATH', async () => {
+    const { env } = await setupEnvironment({})
+    process.stderr.write(`${Object.keys({ ...process.env }).join(', ')}`)
+    process.stderr.write(`Path: ${process.env.Path}\n`)
+    process.stderr.write(`PATH: ${process.env.PATH}\n`)
+    expect((<any>env)['PATH']).toContain(process.env.PATH)
+  })
 })