Load services_test explicitly

src/DependencyInjection/DateTimePrecisionExtension.php

@@ -16,5 +16,9 @@ public function load(array $configs, ContainerBuilder $container): void
     {
         $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yaml');
+
+        if ($container->getParameter('kernel.environment') === 'test') {
+            $loader->load('services_test.yaml');
+        }
     }
 }

src/Resources/config/services.yaml

@@ -21,12 +21,3 @@ services:
 
   DigitalCraftsman\DateTimePrecision\Serializer\YearNormalizer:
     tags: [ { name: 'serializer.normalizer' } ]
-
-when@test:
-  services:
-
-    # Interface autowiring
-    DigitalCraftsman\DateTimePrecision\Clock\Clock: '@DigitalCraftsman\DateTimePrecision\Clock\FrozenClock'
-
-    DigitalCraftsman\DateTimePrecision\Clock\FrozenClock:
-      class: DigitalCraftsman\DateTimePrecision\Clock\FrozenClock

src/Resources/config/services_test.yaml

@@ -0,0 +1,7 @@
+services:
+
+  # Interface autowiring
+  DigitalCraftsman\DateTimePrecision\Clock\Clock: '@DigitalCraftsman\DateTimePrecision\Clock\FrozenClock'
+
+  DigitalCraftsman\DateTimePrecision\Clock\FrozenClock:
+    class: DigitalCraftsman\DateTimePrecision\Clock\FrozenClock