diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 4040da8c3..26a92fdb3 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -58,7 +58,7 @@ jobs:
           - php-version: "8.2"
             dependencies: highest-ignore
             os: ubuntu-latest
-            experimental: false
+            experimental: true
 
     steps:
       - name: "Checkout"
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 0488fa089..a3c9dc084 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -23,6 +23,7 @@ jobs:
         php-version:
           - "7.2"
           - "8.1"
+      fail-fast: false
 
     steps:
       - name: "Checkout"
diff --git a/src/Composer/Compiler.php b/src/Composer/Compiler.php
index 622965076..9bb3e8543 100644
--- a/src/Composer/Compiler.php
+++ b/src/Composer/Compiler.php
@@ -174,10 +174,10 @@ class Compiler
         }
 
         if ($extraFiles) {
-            throw new \RuntimeException('These files were expected but not added to the phar, they might be excluded or gone from the source package:'.PHP_EOL.implode(PHP_EOL, $extraFiles));
+            throw new \RuntimeException('These files were expected but not added to the phar, they might be excluded or gone from the source package:'.PHP_EOL.var_export($extraFiles, true));
         }
         if ($unexpectedFiles) {
-            throw new \RuntimeException('These files were unexpectedly added to the phar, make sure they are excluded or listed in $extraFiles:'.PHP_EOL.implode(PHP_EOL, $unexpectedFiles));
+            throw new \RuntimeException('These files were unexpectedly added to the phar, make sure they are excluded or listed in $extraFiles:'.PHP_EOL.var_export($unexpectedFiles, true));
         }
 
         // Add bin/composer
diff --git a/src/Composer/Installer/InstallationManager.php b/src/Composer/Installer/InstallationManager.php
index 07e6709c7..e1d3d2ee2 100644
--- a/src/Composer/Installer/InstallationManager.php
+++ b/src/Composer/Installer/InstallationManager.php
@@ -223,7 +223,7 @@ class InstallationManager
         };
 
         $handleInterruptsUnix = function_exists('pcntl_async_signals') && function_exists('pcntl_signal');
-        $handleInterruptsWindows = function_exists('sapi_windows_set_ctrl_handler') && PHP_SAPI === 'cli';
+        $handleInterruptsWindows = PHP_VERSION_ID >= 70400 && function_exists('sapi_windows_set_ctrl_handler') && PHP_SAPI === 'cli';
         $prevHandler = null;
         $windowsHandler = null;
         if ($handleInterruptsUnix) {
diff --git a/tests/Composer/Test/Downloader/ZipDownloaderTest.php b/tests/Composer/Test/Downloader/ZipDownloaderTest.php
index 3885a33e6..eec37356a 100644
--- a/tests/Composer/Test/Downloader/ZipDownloaderTest.php
+++ b/tests/Composer/Test/Downloader/ZipDownloaderTest.php
@@ -114,7 +114,7 @@ class ZipDownloaderTest extends TestCase
 
         $this->setPrivateProperty('hasZipArchive', true);
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader);
-        $zipArchive = $this->getMockBuilder('ZipArchive')->onlyMethods(['open', 'extractTo'])->getMock();
+        $zipArchive = $this->getMockBuilder('ZipArchive')->getMock();
         $zipArchive->expects($this->once())
             ->method('open')
             ->will($this->returnValue(true));
@@ -137,10 +137,10 @@ class ZipDownloaderTest extends TestCase
         $this->setPrivateProperty('hasZipArchive', true);
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader);
         $zipArchive = $this->getMockBuilder('ZipArchive')->getMock();
-        $zipArchive->expects($this->at(0))
+        $zipArchive->expects($this->once())
             ->method('open')
             ->will($this->returnValue(true));
-        $zipArchive->expects($this->at(1))
+        $zipArchive->expects($this->once())
             ->method('extractTo')
             ->will($this->throwException(new \ErrorException('Not a directory')));
 
@@ -158,10 +158,10 @@ class ZipDownloaderTest extends TestCase
         $this->setPrivateProperty('hasZipArchive', true);
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader);
         $zipArchive = $this->getMockBuilder('ZipArchive')->getMock();
-        $zipArchive->expects($this->at(0))
+        $zipArchive->expects($this->once())
             ->method('open')
             ->will($this->returnValue(true));
-        $zipArchive->expects($this->at(1))
+        $zipArchive->expects($this->once())
             ->method('extractTo')
             ->will($this->returnValue(true));
 
@@ -189,7 +189,7 @@ class ZipDownloaderTest extends TestCase
             ->will($this->returnValue('output'));
 
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
-        $processExecutor->expects($this->at(0))
+        $processExecutor->expects($this->once())
             ->method('executeAsync')
             ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
@@ -216,7 +216,7 @@ class ZipDownloaderTest extends TestCase
             ->will($this->returnValue('output'));
 
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
-        $processExecutor->expects($this->at(0))
+        $processExecutor->expects($this->once())
             ->method('executeAsync')
             ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
@@ -246,15 +246,15 @@ class ZipDownloaderTest extends TestCase
             ->will($this->returnValue('output'));
 
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
-        $processExecutor->expects($this->at(0))
+        $processExecutor->expects($this->once())
             ->method('executeAsync')
             ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
         $zipArchive = $this->getMockBuilder('ZipArchive')->getMock();
-        $zipArchive->expects($this->at(0))
+        $zipArchive->expects($this->once())
             ->method('open')
             ->will($this->returnValue(true));
-        $zipArchive->expects($this->at(1))
+        $zipArchive->expects($this->once())
             ->method('extractTo')
             ->will($this->returnValue(true));
 
@@ -286,15 +286,15 @@ class ZipDownloaderTest extends TestCase
             ->will($this->returnValue('output'));
 
         $processExecutor = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
-        $processExecutor->expects($this->at(0))
+        $processExecutor->expects($this->once())
           ->method('executeAsync')
           ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
         $zipArchive = $this->getMockBuilder('ZipArchive')->getMock();
-        $zipArchive->expects($this->at(0))
+        $zipArchive->expects($this->once())
           ->method('open')
           ->will($this->returnValue(true));
-        $zipArchive->expects($this->at(1))
+        $zipArchive->expects($this->once())
           ->method('extractTo')
           ->will($this->returnValue(false));