diff --git a/.gitignore b/.gitignore
index 9940a70..3231517 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
+/.phpunit.result.cache
 /build/
 /vendor/
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
deleted file mode 100644
index 61cd84c..0000000
--- a/tests/ExampleTest.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-
-test('example', function () {
-    expect(true)->toBeTrue();
-});
diff --git a/tests/Validator/ConfigurationValidatorTest.php b/tests/Validator/ConfigurationValidatorTest.php
new file mode 100644
index 0000000..4885b84
--- /dev/null
+++ b/tests/Validator/ConfigurationValidatorTest.php
@@ -0,0 +1,23 @@
+<?php
+
+use OliverDaviesLtd\BuildConfigs\Validator\ConfigurationValidator;
+
+beforeEach(function (): void {
+    $this->validator = new ConfigurationValidator();
+});
+
+test('The project name should be a string', function (mixed $projectName, int $expectedViolationCount) {
+    $configuration = [
+        'name' => $projectName,
+    ];
+
+    expect($this->validator->validate($configuration))
+        ->toHaveCount($expectedViolationCount);
+})->with(function () {
+    yield 'Non-empty string' => ['test', 0];
+    yield 'Empty string' => ['', 1];
+    yield 'Integer' => [1, 1];
+    yield 'Null' => [null, 1];
+    yield 'True' => [true, 1];
+    yield 'False' => [false, 2];
+});