diff --git a/tests/Config/ConfigurationTest.php b/tests/Config/ConfigurationTest.php
index 0cb8c16..ae83dda 100644
--- a/tests/Config/ConfigurationTest.php
+++ b/tests/Config/ConfigurationTest.php
@@ -36,6 +36,30 @@ class ConfigurationTest extends TestCase
         $this->validateConfig($config);
     }
 
+    public function testThrowsIfNoColoursExist(): void
+    {
+        $config = $this->getValidConfig();
+        $config['colours'] = [];
+        $this->expectExceptionMessage("Colours cannot be empty!");
+        $this->validateConfig($config);
+    }
+
+    public function testThrowsIfColourHasMissingClass(): void
+    {
+        $config = $this->getValidConfig();
+        unset($config['colours']['primary']['fill']);
+        $this->expectException(\Exception::class);
+        $this->validateConfig($config);
+    }
+
+    public function testThrowsIfColourHasExtraClass(): void
+    {
+        $config = $this->getValidConfig();
+        $config['colours']['primary']['extra'] = "test";
+        $this->expectException(\Exception::class);
+        $this->validateConfig($config);
+    }
+
     private function validateConfig(array $config): void
     {
         $this->processor->processConfiguration($this->configuration, [$config]);