diff --git a/src/Exception/InvalidArgumentException.php b/src/Exception/InvalidArgumentException.php
index e02d14d..8aebbe0 100644
--- a/src/Exception/InvalidArgumentException.php
+++ b/src/Exception/InvalidArgumentException.php
@@ -23,7 +23,7 @@ class InvalidArgumentException extends Exception
         return new self('The array has zero elements');
     }
 
-    public static function arraySizeToSmall(int $minimumSize = 2): self
+    public static function arraySizeTooSmall(int $minimumSize = 2): self
     {
         return new self(sprintf('The array must have at least %d elements', $minimumSize));
     }
diff --git a/src/Math/Statistic/ANOVA.php b/src/Math/Statistic/ANOVA.php
index b0d0d37..65548a1 100644
--- a/src/Math/Statistic/ANOVA.php
+++ b/src/Math/Statistic/ANOVA.php
@@ -25,7 +25,7 @@ final class ANOVA
     {
         $classes = count($samples);
         if ($classes < 2) {
-            throw InvalidArgumentException::arraySizeToSmall(2);
+            throw InvalidArgumentException::arraySizeTooSmall(2);
         }
 
         $samplesPerClass = array_map(function (array $class): int {
diff --git a/src/Math/Statistic/Covariance.php b/src/Math/Statistic/Covariance.php
index ac24a53..3dfce4b 100644
--- a/src/Math/Statistic/Covariance.php
+++ b/src/Math/Statistic/Covariance.php
@@ -21,7 +21,7 @@ class Covariance
 
         $n = count($x);
         if ($sample && $n === 1) {
-            throw InvalidArgumentException::arraySizeToSmall(2);
+            throw InvalidArgumentException::arraySizeTooSmall(2);
         }
 
         if ($meanX === null) {
@@ -59,7 +59,7 @@ class Covariance
 
         $n = count($data);
         if ($sample && $n === 1) {
-            throw InvalidArgumentException::arraySizeToSmall(2);
+            throw InvalidArgumentException::arraySizeTooSmall(2);
         }
 
         if ($i < 0 || $k < 0 || $i >= $n || $k >= $n) {
diff --git a/src/Math/Statistic/StandardDeviation.php b/src/Math/Statistic/StandardDeviation.php
index 426e4fd..5bf4940 100644
--- a/src/Math/Statistic/StandardDeviation.php
+++ b/src/Math/Statistic/StandardDeviation.php
@@ -20,7 +20,7 @@ class StandardDeviation
         $n = count($numbers);
 
         if ($sample && $n === 1) {
-            throw InvalidArgumentException::arraySizeToSmall(2);
+            throw InvalidArgumentException::arraySizeTooSmall(2);
         }
 
         $mean = Mean::arithmetic($numbers);
diff --git a/tests/CrossValidation/RandomSplitTest.php b/tests/CrossValidation/RandomSplitTest.php
index 75f60ff..65e8d8b 100644
--- a/tests/CrossValidation/RandomSplitTest.php
+++ b/tests/CrossValidation/RandomSplitTest.php
@@ -11,7 +11,7 @@ use PHPUnit\Framework\TestCase;
 
 class RandomSplitTest extends TestCase
 {
-    public function testThrowExceptionOnToSmallTestSize(): void
+    public function testThrowExceptionOnTooSmallTestSize(): void
     {
         $this->expectException(InvalidArgumentException::class);
         new RandomSplit(new ArrayDataset([], []), 0);
diff --git a/tests/Math/Statistic/ANOVATest.php b/tests/Math/Statistic/ANOVATest.php
index 81717f8..2203bf1 100644
--- a/tests/Math/Statistic/ANOVATest.php
+++ b/tests/Math/Statistic/ANOVATest.php
@@ -32,7 +32,7 @@ final class ANOVATest extends TestCase
         self::assertEquals([0.6, 2.4, 1.24615385], ANOVA::oneWayF($samples), '', 0.00000001);
     }
 
-    public function testThrowExceptionOnToSmallSamples(): void
+    public function testThrowExceptionOnTooSmallSamples(): void
     {
         $this->expectException(InvalidArgumentException::class);
         $samples = [
diff --git a/tests/Math/Statistic/CovarianceTest.php b/tests/Math/Statistic/CovarianceTest.php
index 43b775a..fd7187a 100644
--- a/tests/Math/Statistic/CovarianceTest.php
+++ b/tests/Math/Statistic/CovarianceTest.php
@@ -73,7 +73,7 @@ class CovarianceTest extends TestCase
         Covariance::fromXYArrays([1, 2, 3], []);
     }
 
-    public function testThrowExceptionOnToSmallArrayIfSample(): void
+    public function testThrowExceptionOnTooSmallArrayIfSample(): void
     {
         $this->expectException(InvalidArgumentException::class);
         Covariance::fromXYArrays([1], [2], true);
@@ -85,7 +85,7 @@ class CovarianceTest extends TestCase
         Covariance::fromDataset([], 0, 1);
     }
 
-    public function testThrowExceptionOnToSmallDatasetIfSample(): void
+    public function testThrowExceptionOnTooSmallDatasetIfSample(): void
     {
         $this->expectException(InvalidArgumentException::class);
         Covariance::fromDataset([1], 0, 1);
diff --git a/tests/Math/Statistic/StandardDeviationTest.php b/tests/Math/Statistic/StandardDeviationTest.php
index 51c2770..c6fd47e 100644
--- a/tests/Math/Statistic/StandardDeviationTest.php
+++ b/tests/Math/Statistic/StandardDeviationTest.php
@@ -32,7 +32,7 @@ class StandardDeviationTest extends TestCase
         StandardDeviation::population([], false);
     }
 
-    public function testThrowExceptionOnToSmallArray(): void
+    public function testThrowExceptionOnTooSmallArray(): void
     {
         $this->expectException(InvalidArgumentException::class);
         StandardDeviation::population([1]);