test: stabilize ansi capability detector

Author: coisa

AGENTS.md

@@ -131,6 +131,9 @@ composer dev-tools tests -- --coverage=.dev-tools/coverage
 - Keep child-process environment policy centralized in `ProcessQueue`
   configurators, including disabling Xdebug for non-coverage subprocesses while
   preserving coverage drivers when PCOV is unavailable.
+- Prefer the project-approved `Safe\*` function imports whenever replacing or
+  adding native PHP calls that have Safe equivalents, so Rector does not have
+  to rewrite them during commit checks.
 
 **Naming Conventions:**
 

tests/Console/Output/OutputCapabilityDetectorTest.php

@@ -27,6 +27,9 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Output\StreamOutput;
 
+use function Safe\fopen;
+use function Safe\fclose;
+
 #[CoversClass(OutputCapabilityDetector::class)]
 final class OutputCapabilityDetectorTest extends TestCase
 {
@@ -69,7 +72,9 @@ public function doesNotSupportAnsiForPlainNonTtyStreamOutput(): void
         self::assertIsResource($stream);
 
         try {
-            self::assertFalse((new OutputCapabilityDetector())->supportsAnsi(new StreamOutput($stream)));
+            self::assertFalse(
+                (new OutputCapabilityDetector())->supportsAnsi(new StreamOutput($stream, decorated: false))
+            );
         } finally {
             fclose($stream);
         }