@@ -72,6 +72,7 @@ public function processCovers(
 $errors = [];
 $covers = (string) $phpDocTag->value;
 $isMethod = strpos($covers, '::') !== false;
+$fullName = $covers;
 
 if ($isMethod) {
 [$className, $method] = explode('::', $covers);
@@ -81,6 +82,7 @@ public function processCovers(
 
 if ($className === '' && $node instanceof Node\Stmt\ClassMethod && $coversDefaultClass !== null) {
 $className = (string) $coversDefaultClass->value;
+$fullName = $className . $covers;
 }
 
 if ($this->reflectionProvider->hasClass($className)) {
@@ -89,7 +91,7 @@ public function processCovers(
 if (isset($method) && $method !== '' && !$class->hasMethod($method)) {
 $errors[] = RuleErrorBuilder::message(sprintf(
 '@covers value %s references an invalid method.',
-$covers
+$fullName
 ))->build();
 }
 } else {
@@ -99,7 +101,7 @@ public function processCovers(
 
 $errors[] = RuleErrorBuilder::message(sprintf(
 '@covers value %s references an invalid %s.',
-$covers,
+$fullName,
 $isMethod ? 'method' : 'class or function'
 ))->build();
 }

@@ -26,7 +26,7 @@ public function testRule(): void
 {
 $this->analyse([__DIR__ . '/data/method-coverage.php'], [
 [
-'@covers value ::ignoreThis references an invalid method.',
+'@covers value \Not\A\Class::ignoreThis references an invalid method.',
 14,
 ],
 [
@@ -42,7 +42,7 @@ public function testRule(): void
 50,
 ],
 [
-'@covers value ::assertNotReal references an invalid method.',
+'@covers value \PHPUnit\Framework\TestCase::assertNotReal references an invalid method.',
 62,
 ],
 [