From 07b86e9d4a82a725bfc309f86971bc2a0ff5c41c Mon Sep 17 00:00:00 2001
From: Ondrej Mirtes <ondrej@mirtes.cz>
Date: Sun, 26 Oct 2025 12:01:12 +0100
Subject: [PATCH 1/2] failing test

---
 .../data/data-provider-trimming-args.php      | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tests/Rules/PHPUnit/data/data-provider-trimming-args.php b/tests/Rules/PHPUnit/data/data-provider-trimming-args.php
index 60fc7cf4..231d3f52 100644
--- a/tests/Rules/PHPUnit/data/data-provider-trimming-args.php
+++ b/tests/Rules/PHPUnit/data/data-provider-trimming-args.php
@@ -30,3 +30,37 @@ public function testProvide2(int $i): void
 	}
 
 }
+
+class BarTest extends TestCase
+{
+
+	/**
+	 * @return array<array<string>>
+	 */
+	public function getData(): array
+	{
+		return [];
+	}
+
+	public function dataProvide(): array
+	{
+		return $this->getData();
+	}
+
+	/**
+	 * @dataProvider dataProvide
+	 */
+	public function testProvide(string ...$arg): void
+	{
+
+	}
+
+	/**
+	 * @dataProvider dataProvide
+	 */
+	public function testProvide2(string $arg): void
+	{
+
+	}
+
+}

From eaf693336783f4003aa7ac69cf4e697ecc5a94e7 Mon Sep 17 00:00:00 2001
From: Ondrej Mirtes <ondrej@mirtes.cz>
Date: Sun, 26 Oct 2025 14:06:12 +0100
Subject: [PATCH 2/2] fix

---
 src/Rules/PHPUnit/DataProviderDataRule.php | 23 +++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/Rules/PHPUnit/DataProviderDataRule.php b/src/Rules/PHPUnit/DataProviderDataRule.php
index e241053e..45a7fa16 100644
--- a/src/Rules/PHPUnit/DataProviderDataRule.php
+++ b/src/Rules/PHPUnit/DataProviderDataRule.php
@@ -84,15 +84,20 @@ public function processNode(Node $node, Scope $scope): array
 			return [];
 		}
 
-		$maxNumberOfParameters = $testsWithProvider[0]->getNumberOfParameters();
-		if (count($testsWithProvider) > 1) {
-			foreach ($testsWithProvider as $testMethod) {
-				if ($testMethod->isVariadic()) {
-					$maxNumberOfParameters = PHP_INT_MAX;
-					break;
-				}
+		$maxNumberOfParameters = null;
+		foreach ($testsWithProvider as $testMethod) {
+			$num = $testMethod->getNumberOfParameters();
+			if ($testMethod->isVariadic()) {
+				$num = PHP_INT_MAX;
+			}
+			if ($maxNumberOfParameters === null) {
+				$maxNumberOfParameters = $num;
+				continue;
+			}
 
-				$maxNumberOfParameters = max($maxNumberOfParameters, $testMethod->getNumberOfParameters());
+			$maxNumberOfParameters = max($maxNumberOfParameters, $num);
+			if ($num === PHP_INT_MAX) {
+				break;
 			}
 		}
 
@@ -100,7 +105,7 @@ public function processNode(Node $node, Scope $scope): array
 			$numberOfParameters = $testMethod->getNumberOfParameters();
 
 			foreach ($arraysTypes as [$startLine, $arraysType]) {
-				$args = $this->arrayItemsToArgs($arraysType, $maxNumberOfParameters);
+				$args = $this->arrayItemsToArgs($arraysType, $numberOfParameters);
 				if ($args === null) {
 					continue;
 				}