diff --git a/.babelrc b/.babelrc
index 0bc78bd..11a8a70 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,3 +1,4 @@
 {
-	"presets": ["@babel/env", "@babel/preset-typescript"]
+	"presets": ["@babel/env", "@babel/preset-typescript"],
+	"ignore": ["**/*.spec.js", "**/*.spec.ts"]
 }
diff --git a/.editorconfig b/.editorconfig
index 4eb6462..29cb3d0 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -9,6 +9,10 @@ end_of_line = lf
 insert_final_newline = true
 indent_style = tab
 
+[*.yml]
+indent_style = space
+indent_size = 2
+
 [package.json]
 indent_style = space
 indent_size = 2
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cbf45db..48516ad 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -33,11 +33,9 @@ jobs:
 
       - run: npm install
       - run: npm run lint
-      - run: npm run lint-demo
       - run: npm run build
-      - run: npm run build-demo
-      - run: npm run build-types
       - run: npm run test
+      - run: npx testpack-cli --keep={ts-jest,typescript} src/e2e.spec.ts
 
       - name: Upload test coverage report to Codecov
         uses: codecov/codecov-action@v1
diff --git a/demo/src/demo.ts b/demo/src/demo.ts
index 13a2e18..d23c85a 100644
--- a/demo/src/demo.ts
+++ b/demo/src/demo.ts
@@ -1,4 +1,4 @@
-import { condense, condenseIgnoreCase } from '../../src/index';
+import { condense, condenseIgnoreCase } from '../../src';
 import { autoExpandTextarea } from './utils/auto-expand-field';
 import { parseString, WhitespaceHandling } from './utils/wordList';
 
diff --git a/package.json b/package.json
index 93120f4..db53502 100644
--- a/package.json
+++ b/package.json
@@ -18,17 +18,19 @@
     "node": ">=10"
   },
   "scripts": {
-    "build": "npm run clean && babel src -d lib --extensions '.js,.ts' --ignore '**/*.spec.js','**/*.spec.ts' && npm run build-types",
-    "build-demo": "wp --config demo/webpack.config.js",
-    "build-types": "tsc -p ./tsconfig.types.json",
+    "build": "run-s clean build:*",
+    "build:src": "babel src -d lib --extensions '.js,.ts'",
+    "build:demo": "wp --config demo/webpack.config.js",
+    "build:types": "tsc -p ./tsconfig.types.json",
     "clean": "rimraf lib/*",
     "format": "prettier --write 'src/**'",
-    "lint": "tsc -p ./tsconfig.json && eslint ./src --report-unused-disable-directives --ext .js,.ts --parser-options=project:./tsconfig.json",
-    "lint-demo": "tsc -p ./demo/tsconfig.json && eslint ./demo --report-unused-disable-directives --ext .js,.ts --parser-options=project:./demo/tsconfig.json",
+    "lint": "run-s lint:*",
+    "lint:src": "tsc -p ./tsconfig.json && eslint ./src --report-unused-disable-directives --ext .js,.ts --parser-options=project:./tsconfig.json",
+    "lint:demo": "tsc -p ./demo/tsconfig.json && eslint ./demo --report-unused-disable-directives --ext .js,.ts --parser-options=project:./demo/tsconfig.json",
     "precommit": "pretty-quick --staged",
     "prepublish": "npx publish-please guard",
     "publish-please": "npx publish-please",
-    "publish-please-prereqs": "npm run lint && npm run test && npm run build",
+    "publish-please-prereqs": "run-s lint test build",
     "test": "jest --coverage"
   },
   "jest": {
@@ -60,6 +62,7 @@
     "husky": "^0.14.3",
     "jest": "^26.0.0",
     "jest-when": "^2.7.0",
+    "npm-run-all": "^4.1.5",
     "prettier": "^1.13.7",
     "pretty-quick": "^1.6.0",
     "regenerator-runtime": "^0.13.3",
diff --git a/src/e2e.spec.ts b/src/e2e.spec.ts
new file mode 100644
index 0000000..5baea60
--- /dev/null
+++ b/src/e2e.spec.ts
@@ -0,0 +1,21 @@
+import { condense, condenseIgnoreCase } from '.';
+
+describe('condense end-to-end', () => {
+	it('builds a case-sensitive RegEx to match strings', () => {
+		const stringsToMatch = ['foo', 'foobar', 'Foo', 'fooBarBaz'];
+		const matcher = condense(stringsToMatch);
+
+		expect(matcher).toHaveProperty('flags', '');
+		expect(matcher).toHaveProperty('source', '(foo(|bar|BarBaz)|Foo)');
+	});
+});
+
+describe('condenseIgnoreCase end-to-end', () => {
+	it('builds a case-insensitive RegEx to match strings', () => {
+		const stringsToMatch = ['foo', 'foobar', 'Foo', 'fooBarBaz'];
+		const matcher = condenseIgnoreCase(stringsToMatch);
+
+		expect(matcher).toHaveProperty('flags', 'i');
+		expect(matcher).toHaveProperty('source', 'foo(|bar(|baz))');
+	});
+});
diff --git a/src/index.spec.ts b/src/index.spec.ts
index 2b23931..99cc60e 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -2,7 +2,7 @@ import { when } from 'jest-when';
 import { CharTrie } from './types/charTrie';
 import * as patternUtils from './utils/pattern';
 import * as trieUtils from './utils/trie';
-import { condense, condenseIgnoreCase } from './index';
+import { condense, condenseIgnoreCase } from '.';
 
 describe('condense', () => {
 	it('builds pattern from trie of words', () => {