diff --git a/build/phpstan.neon b/build/phpstan.neon
index b285f56e12..b8979d63b7 100644
--- a/build/phpstan.neon
+++ b/build/phpstan.neon
@@ -39,7 +39,6 @@ parameters:
 			- 'PHPStan\ShouldNotHappenException'
 			- 'Symfony\Component\Console\Exception\InvalidArgumentException'
 			- 'PHPStan\BetterReflection\SourceLocator\Exception\InvalidFileLocation'
-			- 'PHPStan\BetterReflection\SourceLocator\Exception\InvalidArgumentException'
 			- 'Symfony\Component\Finder\Exception\DirectoryNotFoundException'
 			- 'InvalidArgumentException'
 			- 'PHPStan\DependencyInjection\ParameterNotFoundException'
diff --git a/src/Rules/Exceptions/DefaultExceptionTypeResolver.php b/src/Rules/Exceptions/DefaultExceptionTypeResolver.php
index f428436b48..40b5a4095d 100644
--- a/src/Rules/Exceptions/DefaultExceptionTypeResolver.php
+++ b/src/Rules/Exceptions/DefaultExceptionTypeResolver.php
@@ -5,6 +5,7 @@
 use Nette\Utils\Strings;
 use PHPStan\Analyser\Scope;
 use PHPStan\Reflection\ReflectionProvider;
+use PHPStan\ShouldNotHappenException;
 use function count;
 
 /**
@@ -27,6 +28,16 @@ public function __construct(
 		private array $checkedExceptionClasses,
 	)
 	{
+		foreach ($this->checkedExceptionClasses as $checkedExceptionClass) {
+			if (!$this->reflectionProvider->hasClass($checkedExceptionClass)) {
+				throw new ShouldNotHappenException('Class ' . $checkedExceptionClass . ' used in \'checkedExceptionClasses\' does not exist.');
+			}
+		}
+		foreach ($this->uncheckedExceptionClasses as $uncheckedExceptionClass) {
+			if (!$this->reflectionProvider->hasClass($uncheckedExceptionClass)) {
+				throw new ShouldNotHappenException('Class ' . $uncheckedExceptionClass . ' used in \'uncheckedExceptionClasses\' does not exist.');
+			}
+		}
 	}
 
 	public function isCheckedException(string $className, Scope $scope): bool
diff --git a/tests/PHPStan/Rules/Exceptions/ThrowsVoidFunctionWithExplicitThrowPointRuleTest.php b/tests/PHPStan/Rules/Exceptions/ThrowsVoidFunctionWithExplicitThrowPointRuleTest.php
index ff6c4416a6..4a50e673da 100644
--- a/tests/PHPStan/Rules/Exceptions/ThrowsVoidFunctionWithExplicitThrowPointRuleTest.php
+++ b/tests/PHPStan/Rules/Exceptions/ThrowsVoidFunctionWithExplicitThrowPointRuleTest.php
@@ -4,6 +4,7 @@
 
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
+use ThrowsVoidFunction\DifferentException;
 use ThrowsVoidFunction\MyException;
 
 /**
@@ -38,7 +39,13 @@ public function dataRule(): array
 			],
 			[
 				false,
-				['DifferentException'],
+				[DifferentException::class],
+				[
+					[
+						'Function ThrowsVoidFunction\foo() throws exception ThrowsVoidFunction\MyException but the PHPDoc contains @throws void.',
+						15,
+					],
+				],
 				[
 					[
 						'Function ThrowsVoidFunction\foo() throws exception ThrowsVoidFunction\MyException but the PHPDoc contains @throws void.',
@@ -53,7 +60,7 @@ public function dataRule(): array
 			],
 			[
 				true,
-				['DifferentException'],
+				[DifferentException::class],
 				[
 					[
 						'Function ThrowsVoidFunction\foo() throws exception ThrowsVoidFunction\MyException but the PHPDoc contains @throws void.',
diff --git a/tests/PHPStan/Rules/Exceptions/ThrowsVoidMethodWithExplicitThrowPointRuleTest.php b/tests/PHPStan/Rules/Exceptions/ThrowsVoidMethodWithExplicitThrowPointRuleTest.php
index 5a2dcb0429..059bcb0bba 100644
--- a/tests/PHPStan/Rules/Exceptions/ThrowsVoidMethodWithExplicitThrowPointRuleTest.php
+++ b/tests/PHPStan/Rules/Exceptions/ThrowsVoidMethodWithExplicitThrowPointRuleTest.php
@@ -4,6 +4,7 @@
 
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
+use ThrowsVoidMethod\DifferentException;
 use ThrowsVoidMethod\MyException;
 use UnhandledMatchError;
 use const PHP_VERSION_ID;
@@ -40,7 +41,7 @@ public function dataRule(): array
 			],
 			[
 				false,
-				['DifferentException'],
+				[DifferentException::class],
 				[
 					[
 						'Method ThrowsVoidMethod\Foo::doFoo() throws exception ThrowsVoidMethod\MyException but the PHPDoc contains @throws void.',
@@ -55,7 +56,7 @@ public function dataRule(): array
 			],
 			[
 				true,
-				['DifferentException'],
+				[DifferentException::class],
 				[
 					[
 						'Method ThrowsVoidMethod\Foo::doFoo() throws exception ThrowsVoidMethod\MyException but the PHPDoc contains @throws void.',
diff --git a/tests/PHPStan/Rules/Exceptions/ThrowsVoidPropertyHookWithExplicitThrowPointRuleTest.php b/tests/PHPStan/Rules/Exceptions/ThrowsVoidPropertyHookWithExplicitThrowPointRuleTest.php
index 6072db088b..757e47c6ca 100644
--- a/tests/PHPStan/Rules/Exceptions/ThrowsVoidPropertyHookWithExplicitThrowPointRuleTest.php
+++ b/tests/PHPStan/Rules/Exceptions/ThrowsVoidPropertyHookWithExplicitThrowPointRuleTest.php
@@ -38,7 +38,7 @@ public function dataRule(): array
 			],
 			[
 				false,
-				['DifferentException'],
+				['ThrowsVoidPropertyHook\\DifferentException'],
 				[
 					[
 						'Get hook for property ThrowsVoidPropertyHook\Foo::$i throws exception ThrowsVoidPropertyHook\MyException but the PHPDoc contains @throws void.',
@@ -57,7 +57,7 @@ public function dataRule(): array
 			],
 			[
 				true,
-				['DifferentException'],
+				['ThrowsVoidPropertyHook\\DifferentException'],
 				[
 					[
 						'Get hook for property ThrowsVoidPropertyHook\Foo::$i throws exception ThrowsVoidPropertyHook\MyException but the PHPDoc contains @throws void.',
diff --git a/tests/PHPStan/Rules/Exceptions/data/throws-void-function.php b/tests/PHPStan/Rules/Exceptions/data/throws-void-function.php
index d5a407ec13..c9e0e566a7 100644
--- a/tests/PHPStan/Rules/Exceptions/data/throws-void-function.php
+++ b/tests/PHPStan/Rules/Exceptions/data/throws-void-function.php
@@ -2,10 +2,10 @@
 
 namespace ThrowsVoidFunction;
 
-class MyException extends \Exception
-{
+class MyException extends \Exception {}
+
+class DifferentException extends \Exception {}
 
-}
 
 /**
  * @throws void
diff --git a/tests/PHPStan/Rules/Exceptions/data/throws-void-method.php b/tests/PHPStan/Rules/Exceptions/data/throws-void-method.php
index fec5c30a9a..084168dce1 100644
--- a/tests/PHPStan/Rules/Exceptions/data/throws-void-method.php
+++ b/tests/PHPStan/Rules/Exceptions/data/throws-void-method.php
@@ -2,10 +2,10 @@
 
 namespace ThrowsVoidMethod;
 
-class MyException extends \Exception
-{
+class MyException extends \Exception {}
+
+class DifferentException extends \Exception {}
 
-}
 
 class Foo
 {
diff --git a/tests/PHPStan/Rules/Exceptions/data/throws-void-property-hook.php b/tests/PHPStan/Rules/Exceptions/data/throws-void-property-hook.php
index 08e3f10940..e7abb0976f 100644
--- a/tests/PHPStan/Rules/Exceptions/data/throws-void-property-hook.php
+++ b/tests/PHPStan/Rules/Exceptions/data/throws-void-property-hook.php
@@ -2,10 +2,10 @@
 
 namespace ThrowsVoidPropertyHook;
 
-class MyException extends \Exception
-{
+class MyException extends \Exception {}
+
+class DifferentException extends \Exception {}
 
-}
 
 class Foo
 {