diff --git a/.gitignore b/.gitignore
index 2b40e74..fe56de9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 
 # compiled output
 dist/
+declarations/
 tmp/
 
 # dependencies
diff --git a/package.json b/package.json
index 98f6086..6778958 100644
--- a/package.json
+++ b/package.json
@@ -38,9 +38,9 @@
     "start": "concurrently 'npm:start:*'",
     "start:js": "rollup --config --watch --no-watch.clearScreen",
     "start:types": "tsc --declaration --watch",
-    "test": "vitest --run",
+    "test": "cd tests && pnpm test",
     "test:types": "tsc --noEmit --project ./tests/type-tests/tsconfig.json",
-    "test:watch": "vitest",
+    "test:watch": "cd tests && pnpm test:watch",
     "prepack": "rollup --config"
   },
   "dependencies": {
@@ -70,7 +70,6 @@
     "publint": "^0.2.7",
     "rollup": "^4.9.1",
     "rollup-plugin-copy": "^3.5.0",
-    "vitest": "^0.18.0",
     "typescript": "^5.3.3"
   },
   "publishConfig": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 48fea36..a865ce6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -84,6 +84,16 @@ importers:
       typescript:
         specifier: ^5.3.3
         version: 5.3.3
+
+  tests:
+    dependencies:
+      '@ember/string':
+        specifier: '*'
+        version: link:..
+    devDependencies:
+      typescript:
+        specifier: 4.7.4
+        version: 4.7.4
       vitest:
         specifier: ^0.18.0
         version: 0.18.1
@@ -6422,6 +6432,12 @@ packages:
     resolution: {integrity: sha512-LQPKVXK8QrBBkL/zclE6YgSWn0I8ew5m0Lf+XL00IwMhlotqRLlzHV+BRrljVQIc+NohUAuQP7mg4HQwrx5Xbg==}
     dev: true
 
+  /typescript@4.7.4:
+    resolution: {integrity: sha512-C0WQT0gezHuw6AdY1M2jxUO83Rjf0HP7Sk1DtXj6j1EwkQNZrHAg2XPWlq62oqEhYvONq5pkC2Y9oPljWToLmQ==}
+    engines: {node: '>=4.2.0'}
+    hasBin: true
+    dev: true
+
   /typescript@5.3.3:
     resolution: {integrity: sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==}
     engines: {node: '>=14.17'}
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 7a4de26..429d910 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,4 +1,3 @@
 packages:
-  - 'ember-string'
-  - 'test-app'
+  - '.'
   - 'tests'
diff --git a/tests/package.json b/tests/package.json
new file mode 100644
index 0000000..aa431a9
--- /dev/null
+++ b/tests/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "@ember/string-tests",
+  "private": true,
+  "scripts": {
+    "test": "vitest --run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@ember/string": "*"
+  },
+  "devDependencies": {
+    "@ember/string": "workspace:*",
+    "typescript": "4.7.4",
+    "vitest": "^0.18.0"
+  },
+  "volta": {
+    "extends": "../package.json"
+  }
+}
diff --git a/vitest.config.ts b/tests/vitest.config.ts
similarity index 81%
rename from vitest.config.ts
rename to tests/vitest.config.ts
index 12886bb..b55c0f5 100644
--- a/vitest.config.ts
+++ b/tests/vitest.config.ts
@@ -5,6 +5,6 @@ const extensions = '{js,mjs,cjs,ts,mts,cts,jsx,tsx}';
 export default defineConfig({
   test: {
     // relative to the directory where this config is located
-    include: [`tests/**/*test.${extensions}`],
+    include: [`**/*test.${extensions}`],
   },
 });