diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ConvertUoMTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ConvertUoMTest.php
index 9a448824..f15725cb 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ConvertUoMTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ConvertUoMTest.php
@@ -4,15 +4,11 @@ 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 ConvertUoMTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
+    const UOM_PRECISION = 1E-12;
 
     public function testGetConversionGroups(): void
     {
@@ -52,7 +48,7 @@ class ConvertUoMTest extends TestCase
     public function testCONVERTUOM($expectedResult, ...$args): void
     {
         $result = Engineering::CONVERTUOM(...$args);
-        self::assertEquals($expectedResult, $result);
+        self::assertEqualsWithDelta($expectedResult, $result, self::UOM_PRECISION);
     }
 
     public function providerCONVERTUOM(): array
@@ -69,7 +65,7 @@ class ConvertUoMTest extends TestCase
 
         $formula = "=CONVERT({$value}, {$fromUoM}, {$toUoM})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::UOM_PRECISION);
     }
 
     public function providerConvertUoMArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfCTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfCTest.php
index f0a721c7..88e808ab 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfCTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfCTest.php
@@ -4,18 +4,12 @@ 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 ErfCTest extends TestCase
 {
     const ERF_PRECISION = 1E-12;
 
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerERFC
      *
@@ -25,7 +19,6 @@ class ErfCTest extends TestCase
     public function testERFC($expectedResult, $lower): void
     {
         $result = Engineering::ERFC($lower);
-        self::assertEquals($expectedResult, $result);
         self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
@@ -43,7 +36,7 @@ class ErfCTest extends TestCase
 
         $formula = "=ERFC({$lower})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
     public function providerErfCArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfPreciseTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfPreciseTest.php
index dc3ee84c..8a069ff1 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfPreciseTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfPreciseTest.php
@@ -4,18 +4,12 @@ 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 ErfPreciseTest extends TestCase
 {
     const ERF_PRECISION = 1E-12;
 
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerERFPRECISE
      *
@@ -25,7 +19,6 @@ class ErfPreciseTest extends TestCase
     public function testERFPRECISE($expectedResult, $limit): void
     {
         $result = Engineering::ERFPRECISE($limit);
-        self::assertEquals($expectedResult, $result);
         self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
@@ -43,7 +36,7 @@ class ErfPreciseTest extends TestCase
 
         $formula = "=ERF.PRECISE({$limit})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
     public function providerErfPreciseArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfTest.php
index 4d13d47d..26e0381c 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Engineering/ErfTest.php
@@ -4,18 +4,12 @@ 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 ErfTest extends TestCase
 {
     const ERF_PRECISION = 1E-12;
 
-    protected function setUp(): void
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-    }
-
     /**
      * @dataProvider providerERF
      *
@@ -26,7 +20,6 @@ class ErfTest extends TestCase
     public function testERF($expectedResult, $lower, $upper = null): void
     {
         $result = Engineering::ERF($lower, $upper);
-        self::assertEquals($expectedResult, $result);
         self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
@@ -44,7 +37,7 @@ class ErfTest extends TestCase
 
         $formula = "=ERF({$lower}, {$upper})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::ERF_PRECISION);
     }
 
     public function providerErfArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/FactTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/FactTest.php
index 328773e0..6bdfa570 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/FactTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/FactTest.php
@@ -6,6 +6,8 @@ use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 
 class FactTest extends AllSetupTeardown
 {
+    const FACT_PRECISION = 1E-12;
+
     /**
      * @dataProvider providerFACT
      *
@@ -53,7 +55,7 @@ class FactTest extends AllSetupTeardown
             $sheet->getCell('B1')->setValue('=FACT(A1)');
         }
         $result = $sheet->getCell('B1')->getCalculatedValue();
-        self::assertEquals($expectedResult, $result);
+        self::assertEqualsWithDelta($expectedResult, $result, self::FACT_PRECISION);
     }
 
     public function providerFACTGnumeric(): array
@@ -70,7 +72,7 @@ class FactTest extends AllSetupTeardown
 
         $formula = "=FACT({$array})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::FACT_PRECISION);
     }
 
     public function providerFactArray(): array
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/MUnitTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/MUnitTest.php
index 96ebc45b..9ac68ee5 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/MUnitTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/MathTrig/MUnitTest.php
@@ -6,6 +6,8 @@ use PhpOffice\PhpSpreadsheet\Calculation\MathTrig\MatrixFunctions;
 
 class MUnitTest extends AllSetupTeardown
 {
+    const MU_PRECISION = 1.0E-12;
+
     public function testMUNIT(): void
     {
         $identity = MatrixFunctions::identity(3);
@@ -15,7 +17,7 @@ class MUnitTest extends AllSetupTeardown
         self::assertEquals($startArray, $resultArray);
         $inverseArray = MatrixFunctions::inverse($startArray);
         $resultArray = MatrixFunctions::multiply($startArray, $inverseArray);
-        self::assertEquals($identity, $resultArray);
+        self::assertEqualsWithDelta($identity, $resultArray, self::MU_PRECISION);
         self::assertEquals('#VALUE!', MatrixFunctions::identity(0));
         self::assertEquals('#VALUE!', MatrixFunctions::identity(-1));
         self::assertEquals('#VALUE!', MatrixFunctions::identity('X'));
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php
index a100695f..1a909932 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php
@@ -6,6 +6,8 @@ use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 
 class NumberValueTest extends AllSetupTeardown
 {
+    const NV_PRECISION = 1.0E-8;
+
     /**
      * @dataProvider providerNUMBERVALUE
      *
@@ -34,7 +36,7 @@ class NumberValueTest extends AllSetupTeardown
             $sheet->getCell('B1')->setValue('=NUMBERVALUE(A1, A2, A3)');
         }
         $result = $sheet->getCell('B1')->getCalculatedValue();
-        self::assertEquals($expectedResult, $result);
+        self::assertEqualsWithDelta($expectedResult, $result, self::NV_PRECISION);
     }
 
     public function providerNUMBERVALUE(): array
@@ -51,7 +53,7 @@ class NumberValueTest extends AllSetupTeardown
 
         $formula = "=NumberValue({$argument1}, {$argument2}, {$argument3})";
         $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+        self::assertEqualsWithDelta($expectedResult, $result, self::NV_PRECISION);
     }
 
     public function providerNumberValueArray(): array
diff --git a/tests/PhpSpreadsheetTests/Cell/AdvancedValueBinderTest.php b/tests/PhpSpreadsheetTests/Cell/AdvancedValueBinderTest.php
index 34ff2121..54f3e0cd 100644
--- a/tests/PhpSpreadsheetTests/Cell/AdvancedValueBinderTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/AdvancedValueBinderTest.php
@@ -11,6 +11,8 @@ use PHPUnit\Framework\TestCase;
 
 class AdvancedValueBinderTest extends TestCase
 {
+    const AVB_PRECISION = 1.0E-8;
+
     /**
      * @var string
      */
@@ -161,7 +163,7 @@ class AdvancedValueBinderTest extends TestCase
         $spreadsheet = new Spreadsheet();
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue($value);
-        self::assertEquals($valueBinded, $sheet->getCell('A1')->getValue());
+        self::assertEqualsWithDelta($valueBinded, $sheet->getCell('A1')->getValue(), self::AVB_PRECISION);
         $spreadsheet->disconnectWorksheets();
     }
 
diff --git a/tests/PhpSpreadsheetTests/Reader/Xlsx/XlsxTest.php b/tests/PhpSpreadsheetTests/Reader/Xlsx/XlsxTest.php
index e1271b9a..6b0ebf67 100644
--- a/tests/PhpSpreadsheetTests/Reader/Xlsx/XlsxTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Xlsx/XlsxTest.php
@@ -15,6 +15,8 @@ use PHPUnit\Framework\TestCase;
 
 class XlsxTest extends TestCase
 {
+    const XLSX_PRECISION = 1.0E-8;
+
     public function testLoadXlsxRowColumnAttributes(): void
     {
         $filename = 'tests/data/Reader/XLSX/rowColumnAttributeTest.xlsx';
@@ -133,10 +135,10 @@ class XlsxTest extends TestCase
 
         $pageMargins = $worksheet->getPageMargins();
         // Convert from inches to cm for testing
-        self::assertEquals(2.5, $pageMargins->getTop() * 2.54);
-        self::assertEquals(3.3, $pageMargins->getLeft() * 2.54);
-        self::assertEquals(3.3, $pageMargins->getRight() * 2.54);
-        self::assertEquals(1.3, $pageMargins->getHeader() * 2.54);
+        self::assertEqualsWithDelta(2.5, $pageMargins->getTop() * 2.54, self::XLSX_PRECISION);
+        self::assertEqualsWithDelta(3.3, $pageMargins->getLeft() * 2.54, self::XLSX_PRECISION);
+        self::assertEqualsWithDelta(3.3, $pageMargins->getRight() * 2.54, self::XLSX_PRECISION);
+        self::assertEqualsWithDelta(1.3, $pageMargins->getHeader() * 2.54, self::XLSX_PRECISION);
 
         self::assertEquals(PageSetup::PAPERSIZE_A4, $worksheet->getPageSetup()->getPaperSize());
         self::assertEquals(['A10', 'A20', 'A30', 'A40', 'A50'], array_keys($worksheet->getBreaks()));
diff --git a/tests/PhpSpreadsheetTests/Shared/FontTest.php b/tests/PhpSpreadsheetTests/Shared/FontTest.php
index c733f8ee..2d5feb6e 100644
--- a/tests/PhpSpreadsheetTests/Shared/FontTest.php
+++ b/tests/PhpSpreadsheetTests/Shared/FontTest.php
@@ -8,6 +8,8 @@ use PHPUnit\Framework\TestCase;
 
 class FontTest extends TestCase
 {
+    const FONT_PRECISION = 1.0E-12;
+
     public function testGetAutoSizeMethod(): void
     {
         $expectedResult = Font::AUTOSIZE_METHOD_APPROX;
@@ -63,7 +65,7 @@ class FontTest extends TestCase
     public function testInchSizeToPixels($expectedResult, $size): void
     {
         $result = Font::inchSizeToPixels($size);
-        self::assertEquals($expectedResult, $result);
+        self::assertEqualsWithDelta($expectedResult, $result, self::FONT_PRECISION);
     }
 
     public function providerInchSizeToPixels(): array
@@ -80,7 +82,7 @@ class FontTest extends TestCase
     public function testCentimeterSizeToPixels($expectedResult, $size): void
     {
         $result = Font::centimeterSizeToPixels($size);
-        self::assertEquals($expectedResult, $result);
+        self::assertEqualsWithDelta($expectedResult, $result, self::FONT_PRECISION);
     }
 
     public function providerCentimeterSizeToPixels(): array
diff --git a/tests/PhpSpreadsheetTests/Shared/Trend/LinearBestFitTest.php b/tests/PhpSpreadsheetTests/Shared/Trend/LinearBestFitTest.php
index 9ada87a5..34321227 100644
--- a/tests/PhpSpreadsheetTests/Shared/Trend/LinearBestFitTest.php
+++ b/tests/PhpSpreadsheetTests/Shared/Trend/LinearBestFitTest.php
@@ -7,6 +7,8 @@ use PHPUnit\Framework\TestCase;
 
 class LinearBestFitTest extends TestCase
 {
+    const LBF_PRECISION = 1.0E-8;
+
     /**
      * @dataProvider providerLinearBestFit
      *
@@ -27,13 +29,13 @@ class LinearBestFitTest extends TestCase
     ): void {
         $bestFit = new LinearBestFit($yValues, $xValues);
         $slope = $bestFit->getSlope(1);
-        self::assertEquals($expectedSlope[0], $slope);
+        self::assertEqualsWithDelta($expectedSlope[0], $slope, self::LBF_PRECISION);
         $slope = $bestFit->getSlope();
-        self::assertEquals($expectedSlope[1], $slope);
+        self::assertEqualsWithDelta($expectedSlope[1], $slope, self::LBF_PRECISION);
         $intersect = $bestFit->getIntersect(1);
-        self::assertEquals($expectedIntersect[0], $intersect);
+        self::assertEqualsWithDelta($expectedIntersect[0], $intersect, self::LBF_PRECISION);
         $intersect = $bestFit->getIntersect();
-        self::assertEquals($expectedIntersect[1], $intersect);
+        self::assertEqualsWithDelta($expectedIntersect[1], $intersect, self::LBF_PRECISION);
 
         $equation = $bestFit->getEquation(2);
         self::assertEquals($expectedEquation, $equation);