diff --git a/tests/PhpSpreadsheetTests/Calculation/CalculationFunctionListTest.php b/tests/PhpSpreadsheetTests/Calculation/CalculationFunctionListTest.php
index bb71ee6e..e95c3267 100644
--- a/tests/PhpSpreadsheetTests/Calculation/CalculationFunctionListTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/CalculationFunctionListTest.php
@@ -41,7 +41,7 @@ class CalculationFunctionListTest extends TestCase
      * @param array|string $functionCall
      * @param string $argumentCount
      */
-    public function testGetFunctions($category, $functionCall, $argumentCount): void
+    public function testGetFunctions(/** @scrutinizer ignore-unused */ $category, $functionCall, /** @scrutinizer ignore-unused */ $argumentCount): void
     {
         self::assertIsCallable($functionCall);
     }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ComplexTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ComplexTest.php
index 451908e0..827654ad 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ComplexTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ComplexTest.php
@@ -4,16 +4,10 @@ namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Engineering;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Engineering;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class ComplexTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerCOMPLEX
      *
@@ -21,7 +15,15 @@ class ComplexTest extends TestCase
      */
     public function testCOMPLEX($expectedResult, ...$args): void
     {
-        $result = Engineering::COMPLEX(...$args);
+        if (count($args) === 0) {
+            $result = Engineering::COMPLEX();
+        } elseif (count($args) === 1) {
+            $result = Engineering::COMPLEX($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Engineering::COMPLEX($args[0], $args[1]);
+        } else {
+            $result = Engineering::COMPLEX($args[0], $args[1], $args[2]);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarDeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarDeTest.php
index cbb8e031..22d99eca 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarDeTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarDeTest.php
@@ -4,16 +4,10 @@ namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class DollarDeTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerDOLLARDE
      *
@@ -21,7 +15,13 @@ class DollarDeTest extends TestCase
      */
     public function testDOLLARDE($expectedResult, ...$args): void
     {
-        $result = Financial::DOLLARDE(...$args);
+        if (count($args) === 0) {
+            $result = Financial::DOLLARDE();
+        } elseif (count($args) === 1) {
+            $result = Financial::DOLLARDE($args[0]);
+        } else {
+            $result = Financial::DOLLARDE($args[0], $args[1]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarFrTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarFrTest.php
index ce74595a..79e3d5ca 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarFrTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/DollarFrTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class DollarFrTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerDOLLARFR
      *
@@ -20,7 +14,13 @@ class DollarFrTest extends TestCase
      */
     public function testDOLLARFR($expectedResult, ...$args): void
     {
-        $result = Financial::DOLLARFR(...$args);
+        if (count($args) === 0) {
+            $result = Financial::DOLLARFR();
+        } elseif (count($args) === 1) {
+            $result = Financial::DOLLARFR($args[0]);
+        } else {
+            $result = Financial::DOLLARFR($args[0], $args[1]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/FvTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/FvTest.php
index 8d17d852..0e621766 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/FvTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/FvTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class FvTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerFV
      *
@@ -20,7 +14,19 @@ class FvTest extends TestCase
      */
     public function testFV($expectedResult, array $args): void
     {
-        $result = Financial::FV(...$args);
+        if (count($args) === 0) {
+            $result = Financial::FV();
+        } elseif (count($args) === 1) {
+            $result = Financial::FV($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Financial::FV($args[0], $args[1]);
+        } elseif (count($args) === 3) {
+            $result = Financial::FV($args[0], $args[1], $args[2]);
+        } elseif (count($args) === 4) {
+            $result = Financial::FV($args[0], $args[1], $args[2], $args[3]);
+        } else {
+            $result = Financial::FV($args[0], $args[1], $args[2], $args[3], $args[4]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/NPerTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/NPerTest.php
index 87230eca..2d7ded04 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/NPerTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/NPerTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class NPerTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerNPER
      *
@@ -20,7 +14,19 @@ class NPerTest extends TestCase
      */
     public function testNPER($expectedResult, array $args): void
     {
-        $result = Financial::NPER(...$args);
+        if (count($args) === 0) {
+            $result = Financial::NPER();
+        } elseif (count($args) === 1) {
+            $result = Financial::NPER($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Financial::NPER($args[0], $args[1]);
+        } elseif (count($args) === 3) {
+            $result = Financial::NPER($args[0], $args[1], $args[2]);
+        } elseif (count($args) === 4) {
+            $result = Financial::NPER($args[0], $args[1], $args[2], $args[3]);
+        } else {
+            $result = Financial::NPER($args[0], $args[1], $args[2], $args[3], $args[4]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PDurationTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PDurationTest.php
index a8d3095a..dbe1b09a 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PDurationTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PDurationTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class PDurationTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerPDURATION
      *
@@ -20,7 +14,15 @@ class PDurationTest extends TestCase
      */
     public function testPDURATION($expectedResult, array $args): void
     {
-        $result = Financial::PDURATION(...$args);
+        if (count($args) === 0) {
+            $result = Financial::PDURATION();
+        } elseif (count($args) === 1) {
+            $result = Financial::PDURATION($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Financial::PDURATION($args[0], $args[1]);
+        } else {
+            $result = Financial::PDURATION($args[0], $args[1], $args[2]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PmtTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PmtTest.php
index d996db10..5c1f6556 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PmtTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PmtTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class PmtTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerPMT
      *
@@ -23,7 +17,13 @@ class PmtTest extends TestCase
         $interestRate = array_shift($args);
         $numberOfPeriods = array_shift($args);
         $presentValue = array_shift($args);
-        $result = Financial::PMT($interestRate, $numberOfPeriods, $presentValue, ...$args);
+        if (count($args) === 0) {
+            $result = Financial::PMT($interestRate, $numberOfPeriods, $presentValue);
+        } elseif (count($args) === 1) {
+            $result = Financial::PMT($interestRate, $numberOfPeriods, $presentValue, $args[0]);
+        } else {
+            $result = Financial::PMT($interestRate, $numberOfPeriods, $presentValue, $args[0], $args[1]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PvTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PvTest.php
index c1b40231..4e4a8f80 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PvTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/PvTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class PvTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerPV
      *
@@ -20,7 +14,19 @@ class PvTest extends TestCase
      */
     public function testPV($expectedResult, array $args): void
     {
-        $result = Financial::PV(...$args);
+        if (count($args) === 0) {
+            $result = Financial::PV();
+        } elseif (count($args) === 1) {
+            $result = Financial::PV($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Financial::PV($args[0], $args[1]);
+        } elseif (count($args) === 3) {
+            $result = Financial::PV($args[0], $args[1], $args[2]);
+        } elseif (count($args) === 4) {
+            $result = Financial::PV($args[0], $args[1], $args[2], $args[3]);
+        } else {
+            $result = Financial::PV($args[0], $args[1], $args[2], $args[3], $args[4]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/RriTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/RriTest.php
index e641b590..9107ba96 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/RriTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/RriTest.php
@@ -3,16 +3,10 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Financial;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Financial;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PHPUnit\Framework\TestCase;
 
 class RriTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerRRI
      *
@@ -20,7 +14,15 @@ class RriTest extends TestCase
      */
     public function testRRI($expectedResult, array $args): void
     {
-        $result = Financial::RRI(...$args);
+        if (count($args) === 0) {
+            $result = Financial::RRI();
+        } elseif (count($args) === 1) {
+            $result = Financial::RRI($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Financial::RRI($args[0], $args[1]);
+        } else {
+            $result = Financial::RRI($args[0], $args[1], $args[2]);
+        }
         self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/UsDollarTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/UsDollarTest.php
index 770b8ffa..db8fa112 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/UsDollarTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Financial/UsDollarTest.php
@@ -12,9 +12,13 @@ class UsDollarTest extends TestCase
      *
      * @param mixed $expectedResult
      */
-    public function testUSDOLLAR($expectedResult, ...$args): void
+    public function testUSDOLLAR($expectedResult, float $amount, ?int $precision = null): void
     {
-        $result = Dollar::format(...$args);
+        if ($precision === null) {
+            $result = Dollar::format($amount);
+        } else {
+            $result = Dollar::format($amount, $precision);
+        }
         self::assertSame($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/IfTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/IfTest.php
index b3e21986..58997161 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/IfTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/IfTest.php
@@ -2,17 +2,11 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Logical;
 
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Calculation\Logical;
 use PHPUnit\Framework\TestCase;
 
 class IfTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerIF
      *
@@ -20,7 +14,15 @@ class IfTest extends TestCase
      */
     public function testIF($expectedResult, ...$args): void
     {
-        $result = Logical::statementIf(...$args);
+        if (count($args) === 0) {
+            $result = Logical::statementIf();
+        } elseif (count($args) === 1) {
+            $result = Logical::statementIf($args[0]);
+        } elseif (count($args) === 2) {
+            $result = Logical::statementIf($args[0], $args[1]);
+        } else {
+            $result = Logical::statementIf($args[0], $args[1], $args[2]);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/NotTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/NotTest.php
index 03eb15ba..6d8b2ca9 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/NotTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Logical/NotTest.php
@@ -3,17 +3,11 @@
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Logical;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Calculation\Logical;
 use PHPUnit\Framework\TestCase;
 
 class NotTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerNOT
      *
@@ -21,7 +15,11 @@ class NotTest extends TestCase
      */
     public function testNOT($expectedResult, ...$args): void
     {
-        $result = Logical::NOT(...$args);
+        if (count($args) === 0) {
+            $result = Logical::NOT();
+        } else {
+            $result = Logical::NOT($args[0]);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandArrayTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandArrayTest.php
index 6e63e5ca..6fffb31c 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandArrayTest.php
@@ -17,7 +17,7 @@ class RandArrayTest extends AllSetupTeardown
 
         $result = MathTrig\Random::randArray($rows, $cols, $min, $max, true);
         self::assertIsArray($result);
-        self::assertCount($rows, $result);
+        self::assertCount($rows, /** @scrutinizer ignore-type */ $result);
         self::assertIsArray($result[0]);
         self::assertCount($cols, $result[0]);
 
@@ -40,7 +40,7 @@ class RandArrayTest extends AllSetupTeardown
 
         $result = MathTrig\Random::randArray($rows, $cols, $min, $max, false);
         self::assertIsArray($result);
-        self::assertCount($rows, $result);
+        self::assertCount($rows, /** @scrutinizer ignore-type */ $result);
         self::assertIsArray($result[0]);
         self::assertCount($cols, $result[0]);
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandBetweenTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandBetweenTest.php
index bd89d501..99cc1fa8 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandBetweenTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/RandBetweenTest.php
@@ -62,7 +62,7 @@ class RandBetweenTest extends AllSetupTeardown
         self::assertIsArray($result);
         self::assertCount($expectedRows, $result);
         self::assertIsArray($result[0]);
-        self::assertCount($expectedColumns, $result[0]);
+        self::assertCount($expectedColumns, /** @scrutinizer ignore-type */ $result[0]);
     }
 
     public function providerRandBetweenArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/SequenceTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/SequenceTest.php
index d2ba3345..9346a6cc 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/SequenceTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/SequenceTest.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\MathTrig;
 
-use PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
+use PhpOffice\PhpSpreadsheet\Calculation\MathTrig\MatrixFunctions;
 
 class SequenceTest extends AllSetupTeardown
 {
@@ -14,7 +14,17 @@ class SequenceTest extends AllSetupTeardown
      */
     public function testSEQUENCE(array $arguments, $expectedResult): void
     {
-        $result = MathTrig\MatrixFunctions::sequence(...$arguments);
+        if (count($arguments) === 0) {
+            $result = MatrixFunctions::sequence();
+        } elseif (count($arguments) === 1) {
+            $result = MatrixFunctions::sequence($arguments[0]);
+        } elseif (count($arguments) === 2) {
+            $result = MatrixFunctions::sequence($arguments[0], $arguments[1]);
+        } elseif (count($arguments) === 3) {
+            $result = MatrixFunctions::sequence($arguments[0], $arguments[1], $arguments[2]);
+        } else {
+            $result = MatrixFunctions::sequence($arguments[0], $arguments[1], $arguments[2], $arguments[3]);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GrowthTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GrowthTest.php
index a5ed8223..a796c370 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GrowthTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GrowthTest.php
@@ -17,11 +17,16 @@ class GrowthTest extends TestCase
      * @dataProvider providerGROWTH
      *
      * @param mixed $expectedResult
-     * @param mixed $yValues
      */
-    public function testGROWTH($expectedResult, $yValues, ...$args): void
+    public function testGROWTH($expectedResult, array $yValues, array $xValues, ?array $newValues = null, ?bool $const = null): void
     {
-        $result = Statistical::GROWTH($yValues, ...$args);
+        if ($newValues === null) {
+            $result = Statistical::GROWTH($yValues, $xValues);
+        } elseif ($const === null) {
+            $result = Statistical::GROWTH($yValues, $xValues, $newValues);
+        } else {
+            $result = Statistical::GROWTH($yValues, $xValues, $newValues, $const);
+        }
 
         self::assertEqualsWithDelta($expectedResult, $result[0], 1E-12);
     }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/TrendTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/TrendTest.php
index c367cb10..2cb06b77 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/TrendTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/TrendTest.php
@@ -17,11 +17,16 @@ class TrendTest extends TestCase
      * @dataProvider providerGROWTH
      *
      * @param mixed $expectedResult
-     * @param mixed $yValues
      */
-    public function testTREND($expectedResult, $yValues, ...$args): void
+    public function testTREND($expectedResult, array $yValues, array $xValues, ?array $newValues = null, ?bool $const = null): void
     {
-        $result = Statistical::TREND($yValues, ...$args);
+        if ($newValues === null) {
+            $result = Statistical::TREND($yValues, $xValues);
+        } elseif ($const === null) {
+            $result = Statistical::TREND($yValues, $xValues, $newValues);
+        } else {
+            $result = Statistical::TREND($yValues, $xValues, $newValues, $const);
+        }
 
         self::assertEqualsWithDelta($expectedResult, $result[0], 1E-12);
     }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Web/WebServiceTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Web/WebServiceTest.php
index 2aff7b3d..c458fd22 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Web/WebServiceTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Web/WebServiceTest.php
@@ -23,7 +23,7 @@ class WebServiceTest extends TestCase
      */
     public function testWEBSERVICE(string $expectedResult, string $url, ?array $responseData): void
     {
-        if ($responseData) {
+        if (!empty($responseData)) {
             $body = $this->createMock(StreamInterface::class);
             $body->expects(self::atMost(1))->method('getContents')->willReturn($responseData[1]);
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
index c12bf060..9ea62400 100644
--- a/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
@@ -76,12 +76,10 @@ class FunctionsTest extends TestCase
 
     /**
      * @dataProvider providerIfCondition
-     *
-     * @param mixed $expectedResult
      */
-    public function testIfCondition($expectedResult, ...$args): void
+    public function testIfCondition(string $expectedResult, string $args): void
     {
-        $result = Functions::ifCondition(...$args);
+        $result = Functions::ifCondition($args);
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Cell/AddressHelperTest.php b/tests/PhpSpreadsheetTests/Cell/AddressHelperTest.php
index 58c696ef..f82a4ead 100644
--- a/tests/PhpSpreadsheetTests/Cell/AddressHelperTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/AddressHelperTest.php
@@ -32,15 +32,17 @@ class AddressHelperTest extends TestCase
         ?int $row = null,
         ?int $column = null
     ): void {
-        $args = [];
-        if ($row !== null) {
-            $args[] = $row;
+        if ($row === null) {
+            if ($column === null) {
+                $actualValue = AddressHelper::convertToA1($address);
+            } else {
+                $actualValue = AddressHelper::convertToA1($address, $column);
+            }
+        } elseif ($column === null) {
+            $actualValue = AddressHelper::convertToA1($address, $row);
+        } else {
+            $actualValue = AddressHelper::convertToA1($address, $row, $column);
         }
-        if ($column !== null) {
-            $args[] = $column;
-        }
-
-        $actualValue = AddressHelper::convertToA1($address, ...$args);
 
         self::assertSame($expectedValue, $actualValue);
     }
diff --git a/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php b/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
index 9a0a2c21..8ed23427 100644
--- a/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
@@ -265,7 +265,7 @@ class CoordinateTest extends TestCase
 
         $cellRange = null;
         // @phpstan-ignore-next-line
-        Coordinate::buildRange($cellRange);
+        Coordinate::buildRange(/** @scrutinizer ignore-type */ $cellRange);
     }
 
     public function testBuildRangeInvalid2(): void
diff --git a/tests/PhpSpreadsheetTests/Document/PropertiesTest.php b/tests/PhpSpreadsheetTests/Document/PropertiesTest.php
index c539da09..e6c95cd4 100644
--- a/tests/PhpSpreadsheetTests/Document/PropertiesTest.php
+++ b/tests/PhpSpreadsheetTests/Document/PropertiesTest.php
@@ -155,11 +155,17 @@ class PropertiesTest extends TestCase
      *
      * @param mixed $expectedType
      * @param mixed $expectedValue
-     * @param mixed $propertyName
+     * @param string $propertyName
+     * @param mixed $propertyValue
+     * @param ?string $propertyType
      */
-    public function testSetCustomProperties($expectedType, $expectedValue, $propertyName, ...$args): void
+    public function testSetCustomProperties($expectedType, $expectedValue, $propertyName, $propertyValue, $propertyType = null): void
     {
-        $this->properties->setCustomProperty($propertyName, ...$args);
+        if ($propertyType === null) {
+            $this->properties->setCustomProperty($propertyName, $propertyValue);
+        } else {
+            $this->properties->setCustomProperty($propertyName, $propertyValue, $propertyType);
+        }
         self::assertTrue($this->properties->isCustomPropertySet($propertyName));
         self::assertSame($expectedType, $this->properties->getCustomPropertyType($propertyName));
         $result = $this->properties->getCustomPropertyValue($propertyName);
diff --git a/tests/PhpSpreadsheetTests/IOFactoryTest.php b/tests/PhpSpreadsheetTests/IOFactoryTest.php
index 958c6eb0..b516a9f4 100644
--- a/tests/PhpSpreadsheetTests/IOFactoryTest.php
+++ b/tests/PhpSpreadsheetTests/IOFactoryTest.php
@@ -81,39 +81,13 @@ class IOFactoryTest extends TestCase
 
     /**
      * @dataProvider providerIdentify
-     *
-     * @param string $file
-     * @param string $expectedName
-     * @param string $expectedClass
      */
-    public function testIdentify($file, $expectedName, $expectedClass): void
+    public function testIdentifyCreateLoad(string $file, string $expectedName, string $expectedClass): void
     {
         $actual = IOFactory::identify($file);
         self::assertSame($expectedName, $actual);
-    }
-
-    /**
-     * @dataProvider providerIdentify
-     *
-     * @param string $file
-     * @param string $expectedName
-     * @param string $expectedClass
-     */
-    public function testCreateReaderForFile($file, $expectedName, $expectedClass): void
-    {
         $actual = IOFactory::createReaderForFile($file);
         self::assertSame($expectedClass, get_class($actual));
-    }
-
-    /**
-     * @dataProvider providerIdentify
-     *
-     * @param string $file
-     * @param string $expectedName
-     * @param string $expectedClass
-     */
-    public function testLoad($file, $expectedName, $expectedClass): void
-    {
         $actual = IOFactory::load($file);
         self::assertInstanceOf(Spreadsheet::class, $actual);
     }
diff --git a/tests/PhpSpreadsheetTests/Shared/DateTest.php b/tests/PhpSpreadsheetTests/Shared/DateTest.php
index 9fb4d919..90ed5cc2 100644
--- a/tests/PhpSpreadsheetTests/Shared/DateTest.php
+++ b/tests/PhpSpreadsheetTests/Shared/DateTest.php
@@ -176,9 +176,9 @@ class DateTest extends TestCase
      *
      * @param mixed $expectedResult
      */
-    public function testIsDateTimeFormatCode($expectedResult, ...$args): void
+    public function testIsDateTimeFormatCode($expectedResult, string $format): void
     {
-        $result = Date::isDateTimeFormatCode(...$args);
+        $result = Date::isDateTimeFormatCode($format);
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Style/ColorTest.php b/tests/PhpSpreadsheetTests/Style/ColorTest.php
index 6575c850..9767c537 100644
--- a/tests/PhpSpreadsheetTests/Style/ColorTest.php
+++ b/tests/PhpSpreadsheetTests/Style/ColorTest.php
@@ -78,11 +78,14 @@ class ColorTest extends TestCase
      * @dataProvider providerColorGetRed
      *
      * @param mixed $expectedResult
-     * @param mixed $color
      */
-    public function testGetRed($expectedResult, $color, ...$args): void
+    public function testGetRed($expectedResult, string $color, ?bool $bool = null): void
     {
-        $result = Color::getRed($color, ...$args);
+        if ($bool === null) {
+            $result = Color::getRed($color);
+        } else {
+            $result = Color::getRed($color, $bool);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
@@ -95,11 +98,14 @@ class ColorTest extends TestCase
      * @dataProvider providerColorGetGreen
      *
      * @param mixed $expectedResult
-     * @param mixed $color
      */
-    public function testGetGreen($expectedResult, $color, ...$args): void
+    public function testGetGreen($expectedResult, string $color, ?bool $bool = null): void
     {
-        $result = Color::getGreen($color, ...$args);
+        if ($bool === null) {
+            $result = Color::getGreen($color);
+        } else {
+            $result = Color::getGreen($color, $bool);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
@@ -112,11 +118,14 @@ class ColorTest extends TestCase
      * @dataProvider providerColorGetBlue
      *
      * @param mixed $expectedResult
-     * @param mixed $color
      */
-    public function testGetBlue($expectedResult, $color, ...$args): void
+    public function testGetBlue($expectedResult, string $color, ?bool $bool = null): void
     {
-        $result = Color::getBlue($color, ...$args);
+        if ($bool === null) {
+            $result = Color::getBlue($color);
+        } else {
+            $result = Color::getBlue($color, $bool);
+        }
         self::assertEquals($expectedResult, $result);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Worksheet/ColumnCellIteratorTest.php b/tests/PhpSpreadsheetTests/Worksheet/ColumnCellIteratorTest.php
index a81058af..b9e18e43 100644
--- a/tests/PhpSpreadsheetTests/Worksheet/ColumnCellIteratorTest.php
+++ b/tests/PhpSpreadsheetTests/Worksheet/ColumnCellIteratorTest.php
@@ -44,7 +44,7 @@ class ColumnCellIteratorTest extends TestCase
             self::assertEquals($ColumnCellIndexResult++, $key);
             self::assertInstanceOf(Cell::class, $ColumnCell);
         }
-        $transposed = array_map(null, ...self::CELL_VALUES);
+        $transposed = array_map(/** @scrutinizer ignore-type */ null, ...self::CELL_VALUES);
         self::assertSame($transposed[0], $values);
         $spreadsheet->disconnectWorksheets();
     }