diff --git a/rules/PHPUnit90/Rector/MethodCall/AssertRegExpRector.php b/rules/PHPUnit90/Rector/MethodCall/AssertRegExpRector.php
index ead35169..9c740f0d 100644
--- a/rules/PHPUnit90/Rector/MethodCall/AssertRegExpRector.php
+++ b/rules/PHPUnit90/Rector/MethodCall/AssertRegExpRector.php
@@ -97,8 +97,9 @@ public function refactor(Node $node): ?Node
                 continue;
             }
 
-            if (! $this->testsNodeAnalyzer->isPHPUnitMethodCallNames(
-                $stmt->expr,
+            // cheap name gate before the costly TestCase type resolution below
+            if (! $this->isNames(
+                $stmt->expr->name,
                 [self::ASSERT_SAME, self::ASSERT_EQUALS, self::ASSERT_NOT_SAME, self::ASSERT_NOT_EQUALS]
             )) {
                 continue;
@@ -108,10 +109,13 @@ public function refactor(Node $node): ?Node
                 continue;
             }
 
-            /** @var FuncCall|Node $secondArgumentValue */
-            $secondArgumentValue = $stmt->expr->getArgs()[1]
-                ->value;
+            $callArgs = $stmt->expr->getArgs();
+            if (! isset($callArgs[1])) {
+                continue;
+            }
 
+            // cheap preg_match arg gate before the costly TestCase type resolution below
+            $secondArgumentValue = $callArgs[1]->value;
             if (! $secondArgumentValue instanceof FuncCall) {
                 continue;
             }
@@ -124,6 +128,13 @@ public function refactor(Node $node): ?Node
                 continue;
             }
 
+            if (! $this->testsNodeAnalyzer->isPHPUnitMethodCallNames(
+                $stmt->expr,
+                [self::ASSERT_SAME, self::ASSERT_EQUALS, self::ASSERT_NOT_SAME, self::ASSERT_NOT_EQUALS]
+            )) {
+                continue;
+            }
+
             $oldMethodName = $this->getName($stmt->expr->name);
             if ($oldMethodName === null) {
                 continue;