diff --git a/tests/Cache/CacheTest.php b/tests/Cache/CacheTest.php
index c696aef96dd..cb04a6d9e62 100644
--- a/tests/Cache/CacheTest.php
+++ b/tests/Cache/CacheTest.php
@@ -26,6 +26,15 @@
 
 class CacheTest extends TestCase
 {
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+    }
+
     public function setUp(): void
     {
         parent::setUp();
diff --git a/tests/Config/ConfigFileTest.php b/tests/Config/ConfigFileTest.php
index a198a41c87d..746fc62d27e 100644
--- a/tests/Config/ConfigFileTest.php
+++ b/tests/Config/ConfigFileTest.php
@@ -23,6 +23,15 @@ class ConfigFileTest extends TestCase
 {
     private string $file_path;
 
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+    }
+
     public function setUp(): void
     {
         RuntimeCaches::clearAll();
diff --git a/tests/Config/ConfigTest.php b/tests/Config/ConfigTest.php
index dd6a3fa6b80..605140a8bbf 100644
--- a/tests/Config/ConfigTest.php
+++ b/tests/Config/ConfigTest.php
@@ -56,6 +56,10 @@ class ConfigTest extends TestCase
 
     public static function setUpBeforeClass(): void
     {
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+
         self::$config = new TestConfig();
 
         if (!defined('PSALM_VERSION')) {
@@ -1334,10 +1338,6 @@ function handleThrow(I $e) : void {
 
     public function testModularConfig(): void
     {
-        // hack to isolate Psalm from PHPUnit arguments
-        global $argv;
-        $argv = [];
-
         $root = __DIR__ . '/../fixtures/ModularConfig';
         $config = Config::loadFromXMLFile($root . '/psalm.xml', $root);
         $this->assertEquals(
diff --git a/tests/ForbiddenCodeTest.php b/tests/ForbiddenCodeTest.php
index a841f65fcf3..bae5147beb5 100644
--- a/tests/ForbiddenCodeTest.php
+++ b/tests/ForbiddenCodeTest.php
@@ -19,6 +19,15 @@ class ForbiddenCodeTest extends TestCase
     use InvalidCodeAnalysisTestTrait;
     use ValidCodeAnalysisTestTrait;
 
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+    }
+
     public function providerInvalidCodeParse(): iterable
     {
         return [
diff --git a/tests/StubTest.php b/tests/StubTest.php
index 1e297daf976..38b8d364474 100644
--- a/tests/StubTest.php
+++ b/tests/StubTest.php
@@ -35,6 +35,10 @@ class StubTest extends TestCase
 
     public static function setUpBeforeClass(): void
     {
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+
         self::$config = new TestConfig();
 
         if (!defined('PSALM_VERSION')) {
diff --git a/tests/VariadicTest.php b/tests/VariadicTest.php
index e77b0a142bb..8e543612b00 100644
--- a/tests/VariadicTest.php
+++ b/tests/VariadicTest.php
@@ -19,6 +19,15 @@ class VariadicTest extends TestCase
 {
     use ValidCodeAnalysisTestTrait;
 
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+
+        // hack to isolate Psalm from PHPUnit cli arguments
+        global $argv;
+        $argv = [];
+    }
+
     public function testVariadicArrayBadParam(): void
     {
         $this->expectExceptionMessage('InvalidScalarArgument');