diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/no_extensions_required.php b/tests/Composer/Test/Autoload/Fixtures/platform/no_extensions_required.php
index 69d65fb1b..188c0fae4 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/no_extensions_required.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/no_extensions_required.php
@@ -8,8 +8,9 @@ if (!(PHP_VERSION_ID >= 70200)) {
     $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0". You are running ' . PHP_VERSION  .  '.';
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }
diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/no_php_required.php b/tests/Composer/Test/Autoload/Fixtures/platform/no_php_required.php
index ae5a9761f..ee7d8cacd 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/no_php_required.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/no_php_required.php
@@ -12,8 +12,9 @@ if ($missingExtensions) {
     $issues[] = 'Your Composer dependencies require the following PHP extensions to be installed: ' . implode(', ', $missingExtensions);
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }
diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/no_php_upper_bound.php b/tests/Composer/Test/Autoload/Fixtures/platform/no_php_upper_bound.php
index 69d65fb1b..188c0fae4 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/no_php_upper_bound.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/no_php_upper_bound.php
@@ -8,8 +8,9 @@ if (!(PHP_VERSION_ID >= 70200)) {
     $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0". You are running ' . PHP_VERSION  .  '.';
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }
diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/replaced_provided_exts.php b/tests/Composer/Test/Autoload/Fixtures/platform/replaced_provided_exts.php
index 98c4d3d1e..c530dc59d 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/replaced_provided_exts.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/replaced_provided_exts.php
@@ -11,8 +11,9 @@ if ($missingExtensions) {
     $issues[] = 'Your Composer dependencies require the following PHP extensions to be installed: ' . implode(', ', $missingExtensions);
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }
diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/specific_php_release.php b/tests/Composer/Test/Autoload/Fixtures/platform/specific_php_release.php
index dc7cfa4f3..5a2d6dfed 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/specific_php_release.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/specific_php_release.php
@@ -8,8 +8,9 @@ if (!(PHP_VERSION_ID >= 70208)) {
     $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.8". You are running ' . PHP_VERSION  .  '.';
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }
diff --git a/tests/Composer/Test/Autoload/Fixtures/platform/typical.php b/tests/Composer/Test/Autoload/Fixtures/platform/typical.php
index 4c78d2378..ba33b7aeb 100644
--- a/tests/Composer/Test/Autoload/Fixtures/platform/typical.php
+++ b/tests/Composer/Test/Autoload/Fixtures/platform/typical.php
@@ -16,8 +16,9 @@ if ($missingExtensions) {
     $issues[] = 'Your Composer dependencies require the following PHP extensions to be installed: ' . implode(', ', $missingExtensions);
 }
 
-if ($issues && !headers_sent()) {
-    header('HTTP/1.1 500 Internal Server Error');
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues) . "\n\n";
-    exit(104);
+if ($issues) {
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(', ', $issues),
+        E_USER_ERROR
+    );
 }