diff --git a/packages/PHPUnit/src/Rector/ArrayToYieldDataProviderRector.php b/packages/PHPUnit/src/Rector/ArrayToYieldDataProviderRector.php
index 6f7df44e8ad..59d6202779b 100644
--- a/packages/PHPUnit/src/Rector/ArrayToYieldDataProviderRector.php
+++ b/packages/PHPUnit/src/Rector/ArrayToYieldDataProviderRector.php
@@ -59,11 +59,11 @@ CODE_SAMPLE
 
     public function isCandidate(Node $node): bool
     {
-        if (! $this->isInTestClass($node)) {
+        if (! $node instanceof ClassMethod) {
             return false;
         }
 
-        if (! $node instanceof ClassMethod) {
+        if (! $this->isInTestClass($node)) {
             return false;
         }
 
diff --git a/packages/PHPUnit/src/Rector/DelegateExceptionArgumentsRector.php b/packages/PHPUnit/src/Rector/DelegateExceptionArgumentsRector.php
index bb87e7fb7f5..2728ac54712 100644
--- a/packages/PHPUnit/src/Rector/DelegateExceptionArgumentsRector.php
+++ b/packages/PHPUnit/src/Rector/DelegateExceptionArgumentsRector.php
@@ -57,6 +57,10 @@ CODE_SAMPLE
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/ExceptionAnnotationRector.php b/packages/PHPUnit/src/Rector/ExceptionAnnotationRector.php
index f456dc0ae35..b484849e978 100644
--- a/packages/PHPUnit/src/Rector/ExceptionAnnotationRector.php
+++ b/packages/PHPUnit/src/Rector/ExceptionAnnotationRector.php
@@ -75,11 +75,11 @@ CODE_SAMPLE
 
     public function isCandidate(Node $node): bool
     {
-        if (! $this->isInTestClass($node)) {
+        if (! $node instanceof ClassMethod) {
             return false;
         }
 
-        if (! $node instanceof ClassMethod) {
+        if (! $this->isInTestClass($node)) {
             return false;
         }
 
diff --git a/packages/PHPUnit/src/Rector/GetMockRector.php b/packages/PHPUnit/src/Rector/GetMockRector.php
index 1862abb39ee..c58ca21e67e 100644
--- a/packages/PHPUnit/src/Rector/GetMockRector.php
+++ b/packages/PHPUnit/src/Rector/GetMockRector.php
@@ -41,6 +41,10 @@ final class GetMockRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertCompareToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertCompareToSpecificMethodRector.php
index e68be546f7f..26f45a4b2bc 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertCompareToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertCompareToSpecificMethodRector.php
@@ -75,6 +75,10 @@ final class AssertCompareToSpecificMethodRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertComparisonToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertComparisonToSpecificMethodRector.php
index 3bc0d0c454d..5c8ad2aafc2 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertComparisonToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertComparisonToSpecificMethodRector.php
@@ -73,6 +73,10 @@ final class AssertComparisonToSpecificMethodRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertFalseStrposToContainsRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertFalseStrposToContainsRector.php
index b562a5ea9c3..f9d5a3550e1 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertFalseStrposToContainsRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertFalseStrposToContainsRector.php
@@ -59,6 +59,10 @@ final class AssertFalseStrposToContainsRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertInstanceOfComparisonRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertInstanceOfComparisonRector.php
index cd6aa80c6b3..781e76f9d7a 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertInstanceOfComparisonRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertInstanceOfComparisonRector.php
@@ -67,6 +67,10 @@ final class AssertInstanceOfComparisonRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertIssetToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertIssetToSpecificMethodRector.php
index bdbdb4bd2e0..a53fab395d1 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertIssetToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertIssetToSpecificMethodRector.php
@@ -57,6 +57,10 @@ final class AssertIssetToSpecificMethodRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertNotOperatorRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertNotOperatorRector.php
index 09d3078df81..502cbfbacd8 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertNotOperatorRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertNotOperatorRector.php
@@ -6,6 +6,7 @@ use PhpParser\Node;
 use PhpParser\Node\Arg;
 use PhpParser\Node\Expr\BooleanNot;
 use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\StaticCall;
 use Rector\Builder\IdentifierRenamer;
 use Rector\NodeAnalyzer\MethodCallAnalyzer;
 use Rector\NodeAnalyzer\StaticMethodCallAnalyzer;
@@ -61,6 +62,10 @@ final class AssertNotOperatorRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall && ! $node instanceof StaticCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertPropertyExistsRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertPropertyExistsRector.php
index 8b4e51eaea7..f9d8a712146 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertPropertyExistsRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertPropertyExistsRector.php
@@ -78,6 +78,10 @@ final class AssertPropertyExistsRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertRegExpRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertRegExpRector.php
index 27a660a3ec9..d19d9e5cddc 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertRegExpRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertRegExpRector.php
@@ -53,6 +53,10 @@ final class AssertRegExpRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertSameBoolNullToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertSameBoolNullToSpecificMethodRector.php
index f3c15d57925..d6f546f0cdc 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertSameBoolNullToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertSameBoolNullToSpecificMethodRector.php
@@ -57,6 +57,10 @@ final class AssertSameBoolNullToSpecificMethodRector extends AbstractPHPUnitRect
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseInternalTypeToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseInternalTypeToSpecificMethodRector.php
index 587e8f73012..cf6ece28a41 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseInternalTypeToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseInternalTypeToSpecificMethodRector.php
@@ -89,6 +89,10 @@ final class AssertTrueFalseInternalTypeToSpecificMethodRector extends AbstractPH
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector.php b/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector.php
index 8397c4f54b8..84a35ee4562 100644
--- a/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector.php
+++ b/packages/PHPUnit/src/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector.php
@@ -90,6 +90,10 @@ final class AssertTrueFalseToSpecificMethodRector extends AbstractPHPUnitRector
 
     public function isCandidate(Node $node): bool
     {
+        if (! $node instanceof MethodCall) {
+            return false;
+        }
+
         if (! $this->isInTestClass($node)) {
             return false;
         }
diff --git a/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Correct/correct.php.inc b/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Correct/correct.php.inc
index 6226ae27c20..92238b9738e 100644
--- a/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Correct/correct.php.inc
+++ b/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Correct/correct.php.inc
@@ -1,5 +1,7 @@
 <?php declare(strict_types=1);
 
+namespace Tests\AssertTrueFalseToSpecificMethodRector;
+
 abstract class Testing extends \PHPUnit\Framework\TestCase
 {
 }
diff --git a/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Wrong/wrong.php.inc b/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Wrong/wrong.php.inc
index bf0ac804e7f..4622bc4a397 100644
--- a/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Wrong/wrong.php.inc
+++ b/packages/PHPUnit/tests/Rector/SpecificMethod/AssertTrueFalseToSpecificMethodRector/Wrong/wrong.php.inc
@@ -1,5 +1,7 @@
 <?php declare(strict_types=1);
 
+namespace Tests\AssertTrueFalseToSpecificMethodRector;
+
 abstract class Testing extends \PHPUnit\Framework\TestCase
 {
 }
diff --git a/src/Rector/AbstractPHPUnitRector.php b/src/Rector/AbstractPHPUnitRector.php
index a2fbe441aec..f5794c92c6a 100644
--- a/src/Rector/AbstractPHPUnitRector.php
+++ b/src/Rector/AbstractPHPUnitRector.php
@@ -3,6 +3,9 @@
 namespace Rector\Rector;
 
 use PhpParser\Node;
+use PhpParser\Node\Stmt\Class_;
+use Rector\Exception\ShouldNotHappenException;
+use Rector\Node\Attribute;
 use Rector\NodeTypeResolver\NodeTypeResolver;
 
 abstract class AbstractPHPUnitRector extends AbstractRector
@@ -24,8 +27,19 @@ abstract class AbstractPHPUnitRector extends AbstractRector
 
     protected function isInTestClass(Node $node): bool
     {
-        $nodeResolved = $this->nodeTypeResolver->resolve($node);
+        /** @var Class_|null $classNode */
+        $classNode = $node->getAttribute(Attribute::CLASS_NODE);
 
-        return ! array_intersect(['PHPUnit\Framework\TestCase', 'PHPUnit_Framework_TestCase'], $nodeResolved);
+        if ($classNode === null) {
+            throw new ShouldNotHappenException(sprintf(
+                '"%s" should be set in "%s"',
+                Attribute::CLASS_NODE,
+                __METHOD__
+            ));
+        }
+
+        $nodeTypes = $this->nodeTypeResolver->resolve($classNode);
+
+        return (bool) array_intersect(['PHPUnit\Framework\TestCase', 'PHPUnit_Framework_TestCase'], $nodeTypes);
     }
 }