diff --git a/composer.json b/composer.json
index baef10a..4b13093 100644
--- a/composer.json
+++ b/composer.json
@@ -21,11 +21,11 @@
     },
     "require-dev": {
         "symfony/var-dumper": "^8.1.0",
-        "testo/assert": "^0.1.9",
-        "testo/codecov": "^0.1.11",
-        "testo/data": "^0.1.6",
-        "testo/test": "^0.1.4",
-        "testo/testo": "^0.10.29"
+        "testo/assert": "^0.1.17",
+        "testo/codecov": "^0.2.3",
+        "testo/data": "^0.1.10",
+        "testo/test": "^0.1.8",
+        "testo/testo": "^0.10.54"
     },
     "autoload": {
         "psr-4": {
diff --git a/testo.php b/testo.php
index 2ac8ec8..a0918ea 100644
--- a/testo.php
+++ b/testo.php
@@ -6,6 +6,7 @@
 use Testo\Application\Config\SuiteConfig;
 
 return new ApplicationConfig(
+    src: ['src'],
     suites: [
         new SuiteConfig(
             name: 'All',
diff --git a/tests/Dic/Internal/Builder/SingletonStrategyTest.php b/tests/Dic/Internal/Builder/SingletonStrategyTest.php
index f96af2e..e3028aa 100644
--- a/tests/Dic/Internal/Builder/SingletonStrategyTest.php
+++ b/tests/Dic/Internal/Builder/SingletonStrategyTest.php
@@ -93,8 +93,9 @@ public function failsOnTheFirstOffendingDependency(): void
             LifetimeStrategy::Singleton->resolve(ref(), $dependencies);
             Assert::fail('Expected a BuildError to be thrown.');
         } catch (BuildError $error) {
-            Assert::true(str_contains($error->getMessage(), '$first'));
-            Assert::false(str_contains($error->getMessage(), '$second'));
+            Assert::string($error->getMessage())
+                ->contains('$first')
+                ->notContains('$second');
         }
     }