diff --git a/config/sets/phpunit90.php b/config/sets/phpunit90.php
index 34e15137..5cbaf8ff 100644
--- a/config/sets/phpunit90.php
+++ b/config/sets/phpunit90.php
@@ -3,9 +3,9 @@
 declare(strict_types=1);
 
 use Rector\Config\RectorConfig;
-use Rector\PHPUnit\PHPUnit90\Rector\MethodCall\AssertRegExpRector;
 use Rector\PHPUnit\PHPUnit100\Rector\StmtsAwareInterface\WithConsecutiveRector;
 use Rector\PHPUnit\PHPUnit90\Rector\Class_\TestListenerToHooksRector;
+use Rector\PHPUnit\PHPUnit90\Rector\MethodCall\AssertRegExpRector;
 use Rector\PHPUnit\PHPUnit90\Rector\MethodCall\ExplicitPhpErrorApiRector;
 use Rector\PHPUnit\PHPUnit90\Rector\MethodCall\SpecificAssertContainsWithoutIdentityRector;
 use Rector\Renaming\Rector\MethodCall\RenameMethodRector;
@@ -28,13 +28,8 @@
             'expectExceptionMessageMatches'
         ),
 
-
         // @see https://github.com/sebastianbergmann/phpunit/issues/4086
-        new MethodCallRename(
-            'PHPUnit\Framework\TestCase',
-            'assertRegExp',
-            'assertMatchesRegularExpression'
-        ),
+        new MethodCallRename('PHPUnit\Framework\TestCase', 'assertRegExp', 'assertMatchesRegularExpression'),
 
         // @see https://github.com/sebastianbergmann/phpunit/issues/4089
         new MethodCallRename(
diff --git a/rules-tests/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector/Fixture/skip_non_phpunit_type.php.inc b/rules-tests/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector/Fixture/skip_non_phpunit_type.php.inc
new file mode 100644
index 00000000..37a0ec8b
--- /dev/null
+++ b/rules-tests/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector/Fixture/skip_non_phpunit_type.php.inc
@@ -0,0 +1,17 @@
+<?php
+
+// skip: non-string argument (enum case) should not crash
+
+namespace Rector\PHPUnit\Tests\PHPUnit120\Rector\Class_\AssertIsTypeMethodCallRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipNonPHPUnitType extends TestCase
+{
+    public function testMethod(\stdClass $else): void
+    {
+        $else->isType('string');
+        $else->isType('array');
+        $else->isType();
+    }
+}
diff --git a/rules/CodeQuality/Rector/ClassMethod/ReplaceTestAnnotationWithPrefixedFunctionRector.php b/rules/CodeQuality/Rector/ClassMethod/ReplaceTestAnnotationWithPrefixedFunctionRector.php
index 5b9e7ae0..c7e3d88e 100644
--- a/rules/CodeQuality/Rector/ClassMethod/ReplaceTestAnnotationWithPrefixedFunctionRector.php
+++ b/rules/CodeQuality/Rector/ClassMethod/ReplaceTestAnnotationWithPrefixedFunctionRector.php
@@ -4,6 +4,7 @@
 
 namespace Rector\PHPUnit\CodeQuality\Rector\ClassMethod;
 
+use function in_array;
 use PhpParser\Comment\Doc;
 use PhpParser\Node;
 use PhpParser\Node\Stmt\ClassMethod;
@@ -15,7 +16,6 @@
 use Rector\Util\NewLineSplitter;
 use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
 use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
-use function in_array;
 
 /**
  * @see \Rector\PHPUnit\Tests\CodeQuality\Rector\ClassMethod\ReplaceTestAnnotationWithPrefixedFunctionRector\ReplaceTestAnnotationWithPrefixedFunctionRectorTest
@@ -87,7 +87,7 @@ public function refactor(Node $node): ?Node
         }
 
         $hasAnnotation = false;
-        foreach(NewLineSplitter::split($docComment->getText()) as $row) {
+        foreach (NewLineSplitter::split($docComment->getText()) as $row) {
             if (in_array(trim($row), ['*@test', '* @test'], true)) {
                 $hasAnnotation = true;
                 break;
diff --git a/rules/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector.php b/rules/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector.php
index d9bd9f59..528d7a74 100644
--- a/rules/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector.php
+++ b/rules/PHPUnit120/Rector/Class_/AssertIsTypeMethodCallRector.php
@@ -22,6 +22,9 @@
  */
 final class AssertIsTypeMethodCallRector extends AbstractRector
 {
+    /**
+     * @var array<string, string>
+     */
     private const array IS_TYPE_VALUE_TO_METHOD = [
         'array' => 'isArray',
         'bool' => 'isBool',
diff --git a/src/NodeAnalyzer/TestsNodeAnalyzer.php b/src/NodeAnalyzer/TestsNodeAnalyzer.php
index 7b0c7c1b..493f5878 100644
--- a/src/NodeAnalyzer/TestsNodeAnalyzer.php
+++ b/src/NodeAnalyzer/TestsNodeAnalyzer.php
@@ -10,6 +10,7 @@
 use PhpParser\Node\Stmt\ClassMethod;
 use PHPStan\Reflection\ClassReflection;
 use PHPStan\Type\ObjectType;
+use PHPStan\Type\StaticType;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfoFactory;
 use Rector\NodeNameResolver\NodeNameResolver;
 use Rector\NodeTypeResolver\NodeTypeResolver;
@@ -101,7 +102,22 @@ public function isPHPUnitMethodCallNames(Node $node, array $names): bool
     public function isPHPUnitTestCaseCall(Node $node): bool
     {
         if ($node instanceof MethodCall) {
-            return $this->isInTestClass($node);
+            $callerType = $this->nodeTypeResolver->getType($node->var);
+            if ($callerType instanceof StaticType) {
+                $callerType = $callerType->getStaticObjectType();
+            }
+
+            if ($callerType instanceof ObjectType) {
+                if ($callerType->isInstanceOf(PHPUnitClassName::TEST_CASE)->yes()) {
+                    return true;
+                }
+
+                if ($callerType->isInstanceOf(PHPUnitClassName::ASSERT)->yes()) {
+                    return true;
+                }
+            }
+
+            return false;
         }
 
         if ($node instanceof StaticCall) {